Messier 87 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Messier 87" in English language version.

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The Event Horizon Telescope Collaboration (10 April 2019). "First M87 Event Horizon Telescope results. I. The shadow of the supermassive black hole" (PDF). The Astrophysical Journal Letters. 875 (1): L1. arXiv:1906.11238. Bibcode:2019ApJ...875L...1E. doi:10.3847/2041-8213/ab0ec7. S2CID 145906806.

almaobservatory.org (Global: low place; English: low place)

"Telescopes unite in unprecedented observations of famous black hole" (Press release). Atacama Large Millimeter Array. Retrieved 15 April 2021.

archive.org (Global: 6^th place; English: 6^th place)

Charles, P. A.; Seward, F. D. (1995). Exploring the X-ray universe. Cambridge, United Kingdom: Cambridge University Press. p. 9. ISBN 978-0-521-43712-7.
Steinicke, W.; Jakiel, R. (2007). Galaxies and how to observe them. Astronomers' observing guides. Springer. pp. 32–33. ISBN 978-1-85233-752-0.

arxiv.org (Global: 69^th place; English: 59^th place)

Cappellari, Michele; et al. (11 May 2011). "The ATLAS^3D project – I. A volume-limited sample of 260 nearby early-type galaxies: science goals and selection criteria". Monthly Notices of the Royal Astronomical Society. 413 (2): 813–836. arXiv:1012.1551. Bibcode:2011MNRAS.413..813C. doi:10.1111/j.1365-2966.2010.18174.x. S2CID 15391206.
Bird, S.; Harris, W.E.; Blakeslee, J. P.; Flynn, C. (December 2010). "The inner halo of M87: A first direct view of the red-giant population". Astronomy and Astrophysics. 524: A71. arXiv:1009.3202. Bibcode:2010A&A...524A..71B. doi:10.1051/0004-6361/201014876. S2CID 119281578.
Doherty, M.; Arnaboldi, M.; Das, P.; Gerhard, O.; Aguerri, J.A.L.; Ciardullo, R.; et al. (August 2009). "The edge of the M87 halo and the kinematics of the diffuse light in the Virgo cluster core". Astronomy and Astrophysics. 502 (3): 771–786. arXiv:0905.1958. Bibcode:2009A&A...502..771D. doi:10.1051/0004-6361/200811532. S2CID 17110964.
Courtois, H.M.; Pomarède, D.; Tully, R.B.; Hoffman, Y.; Courtois, D. (August 2013). "Cosmography of the local universe". The Astronomical Journal. 146 (3): 69. arXiv:1306.0091. Bibcode:2013AJ....146...69C. doi:10.1088/0004-6256/146/3/69. S2CID 118625532.
Forte, Juan C.; Faifer, Favio R.; Vega, E. Irene; Bassino, Lilia P.; Smith Castelli, Analía V.; Cellone, Sergio A.; et al. (11 May 2013). "Multicolour–metallicity relations from globular clusters in NGC 4486 (M87)". Monthly Notices of the Royal Astronomical Society. 431 (2): 1405–1416. arXiv:1302.3154. doi:10.1093/mnras/stt263.
The Event Horizon Telescope Collaboration (2019). "First M87 Event Horizon Telescope results. IV. Imaging the central supermassive black hole" (PDF). The Astrophysical Journal. 875 (1): L4. arXiv:1906.11241. Bibcode:2019ApJ...875L...4E. doi:10.3847/2041-8213/ab0e85. ISSN 2041-8213. S2CID 146068771.
Kundu, A.; Whitmore, B. C. (2001). "New Insights from HST Studies of Globular Cluster Systems. I. Colors, Distances, and Specific Frequencies of 28 Elliptical Galaxies". The Astronomical Journal. 121 (6): 2950–2973. arXiv:astro-ph/0103021. Bibcode:2001AJ....121.2950K. doi:10.1086/321073. S2CID 19015891.
Chakrabarty, D. (2007). "Mass modelling with minimum kinematic information". Monthly Notices of the Royal Astronomical Society. 377 (1): 30–40. arXiv:astro-ph/0702065. Bibcode:2007MNRAS.377...30C. doi:10.1111/j.1365-2966.2007.11583.x. S2CID 16263041.
Wu, X.; Tremaine, S. (2006). "Deriving the Mass Distribution of M87 from Globular Clusters". The Astrophysical Journal. 643 (1): 210–221. arXiv:astro-ph/0508463. Bibcode:2006ApJ...643..210W. doi:10.1086/501515. S2CID 9263634.
Cohen, J. G.; Ryzhov, A. (September 1997). "The Dynamics of the M87 Globular Cluster System". The Astrophysical Journal. 486 (1): 230–241. arXiv:astro-ph/9704051. Bibcode:1997ApJ...486..230C. doi:10.1086/304518. S2CID 13517745.
Murphy, J. D.; Gebhardt, K.; Adams, J. J. (March 2011). "Galaxy Kinematics with VIRUS-P: The Dark Matter Halo of M87". The Astrophysical Journal. 729 (2): 129. arXiv:1101.1957. Bibcode:2011ApJ...729..129M. doi:10.1088/0004-637X/729/2/129. S2CID 118686095.
Emsellem, E.; Krajnovic, D.; Sarzi, M. (November 2014). "A kinematically distinct core and minor-axis rotation: The MUSE perspective on M87". Monthly Notices of the Royal Astronomical Society. 445 (1): L79–L83. arXiv:1408.6844. Bibcode:2014MNRAS.445L..79E. doi:10.1093/mnrasl/slu140. S2CID 18974737.
Battaglia, G.; Helmi, A.; Morrison, H.; Harding, P.; Olszewski, E. W.; Mateo, M.; et al. (December 2005). "The radial velocity dispersion profile of the Galactic halo: Constraining the density profile of the dark halo of the Milky Way". Monthly Notices of the Royal Astronomical Society. 364 (2): 433–442. arXiv:astro-ph/0506102. Bibcode:2005MNRAS.364..433B. doi:10.1111/j.1365-2966.2005.09367.x. S2CID 15562509.
Gebhardt, K.; Thomas, J. (2009). "The black hole mass, stellar mass-to-light ratio, and dark halo in M87". The Astrophysical Journal. 700 (2): 1690–1701. arXiv:0906.1492. Bibcode:2009ApJ...700.1690G. doi:10.1088/0004-637X/700/2/1690. S2CID 15481963.
Janowiecki, S.; Mithos, J. C.; Harding, P.; Feldmeier, J.; Rudick, C.; Morrison, H. (June 2010). "Diffuse Tidal Structures in the Halos of Virgo Ellipticals". The Astrophysical Journal. 715 (2): 972–985. arXiv:1004.1473. Bibcode:2010ApJ...715..972J. doi:10.1088/0004-637X/715/2/972. S2CID 119196248.
Gavazzi, G.; Boselli, A.; Vílchez, J.M.; Iglesias-Paramo, J.; Bonfanti, C. (September 2000). "The filament of ionized gas in the outskirt of M87". Astronomy & Astrophysics. 361: 1–4. arXiv:astro-ph/0007323. Bibcode:2000A&A...361....1G.
Oldham, L.J.; Evans, N.W. (October 2016). "Is there substructure around M87?". Monthly Notices of the Royal Astronomical Society. 460 (1): 298–306. arXiv:1607.02477. Bibcode:2016MNRAS.462..298O. doi:10.1093/mnras/stw1574. S2CID 119307605.
Tsvetanov, Z.I.; Hartig, G.F.; Ford, H.C.; et al. (1999). "The Nuclear Spectrum of M87". In Röser, H.J.; Meisenheimer, K. (eds.). The Radio Galaxy Messier 87. Lecture Notes in Physics. Vol. 530. pp. 307–312. arXiv:astro-ph/9801037. Bibcode:1999LNP...530..307T. doi:10.1007/BFb0106442. ISBN 978-3-540-66209-9. S2CID 18989637.
Sabra, B.M.; Shields, J.C.; Ho, L.C.; et al. (February 2003). "Emission and Absorption in the M87 LINER". The Astrophysical Journal. 584 (1): 164–175. arXiv:astro-ph/0210391. Bibcode:2003ApJ...584..164S. doi:10.1086/345664. S2CID 16882810.
Dehnen, Walter (15–19 September 1997). "M 87 as a Galaxy". In Hermann-Josef Röser; Klaus Meisenheimer (eds.). The radio galaxy Messier 87: proceedings of a workshop. Lecture Notes in Physics. Vol. 530. Ringberg Castle, Tegernsee, Germany: Springer. p. 31. arXiv:astro-ph/9802224. Bibcode:1999LNP...530...31D. doi:10.1007/BFb0106415. ISBN 978-3-540-66209-9.
Longobardi, A.; Arnaboldi, M.; Gerhard, O.; Mihos, J.C. (July 2015). "The build-up of the cD halo of M87 – evidence for accretion in the last Gyr". Astronomy and Astrophysics. 579 (3): L3–L6. arXiv:1504.04369. Bibcode:2015A&A...579L...3L. doi:10.1051/0004-6361/201526282. S2CID 118557973.
Walsh, J.L.; Barth, A.J.; Ho, L.C.; Sarzi, M. (June 2013). "The M87 black hole mass from gas-dynamical models of Space Telescope Imaging Spectrograph observations". The Astrophysical Journal. 770 (2): 86. arXiv:1304.7273. Bibcode:2013ApJ...770...86W. doi:10.1088/0004-637X/770/2/86. S2CID 119193955.
Oldham, L.J.; Auger, M.W. (March 2016). "Galaxy structure from multiple tracers – II. M87 from parsec to megaparsec scales". Monthly Notices of the Royal Astronomical Society. 457 (1): 421–439. arXiv:1601.01323. Bibcode:2016MNRAS.457..421O. doi:10.1093/mnras/stv2982. S2CID 119166670.
The Event Horizon Telescope Collaboration (10 April 2019). "First M87 Event Horizon Telescope results. VI. The shadow and mass of the central black hole" (PDF). The Astrophysical Journal. 875 (1): L6. arXiv:1906.11243. Bibcode:2019ApJ...875L...6E. doi:10.3847/2041-8213/ab1141. S2CID 145969867.
Macchetto, F.; Marconi, A.; Axon, D.J.; Capetti, A.; Sparks, W.; Crane, P. (November 1997). "The Supermassive Black Hole of M87 and the Kinematics of Its Associated Gaseous Disk". The Astrophysical Journal. 489 (2): 579–600. arXiv:astro-ph/9706252. Bibcode:1997ApJ...489..579M. doi:10.1086/304823. S2CID 18948008.
di Matteo, .; Allen, S.W.; Fabian, A.C.; Wilson, A.S.; Young, A.J. (2003). "Accretion onto the supermassive black hole in M87". The Astrophysical Journal. 582 (1): 133–140. arXiv:astro-ph/0202238. Bibcode:2003ApJ...582..133D. doi:10.1086/344504. S2CID 16182340.
Akiyama, Kazunori; Lu, Ru-Sen; Fish, Vincent L; et al. (July 2015). "230 GHz VLBI observations of M87: Event-horizon-scale structure during an enhanced very-high-energy γ-ray state in 2012". The Astrophysical Journal. 807 (2): 150. arXiv:1505.03545. Bibcode:2015ApJ...807..150A. doi:10.1088/0004-637X/807/2/150. hdl:1721.1/98305. S2CID 50953437.
Batcheldor, D.; Robinson, A.; Axon, D. J.; Perlman, E. S.; Merritt, D. (July 2010). "A Displaced Supermassive Black Hole in M87". The Astrophysical Journal Letters. 717 (1): L6–L10. arXiv:1005.2173. Bibcode:2010ApJ...717L...6B. doi:10.1088/2041-8205/717/1/L6. S2CID 119281754.
Gebhardt, K.; et al. (March 2011). "The Black-Hole Mass in M87 from Gemini/NIFS Adaptive Optics Observations". The Astrophysical Journal. 729 (2): 119–131. arXiv:1101.1954. Bibcode:2011ApJ...729..119G. doi:10.1088/0004-637X/729/2/119. S2CID 118368884.
López-Navas, E.; Prieto, M.A. (2018). "The photocentre-AGN displacement: Is M87 actually harbouring a displaced supermassive black hole?". Monthly Notices of the Royal Astronomical Society. 480 (3): 4099. arXiv:1808.04123. Bibcode:2018MNRAS.480.4099L. doi:10.1093/mnras/sty2148. S2CID 118872175.
Falcke, Heino; Melia, Fulvio; Agol, Eric (1 January 2000). "Viewing the shadow of the black hole at the galactic center". The Astrophysical Journal. 528 (1): L13–L16. arXiv:astro-ph/9912263. Bibcode:2000ApJ...528L..13F. doi:10.1086/312423. PMID 10587484. S2CID 119433133.
The Event Horizon Telescope Collaboration (10 April 2019). "First M87 Event Horizon Telescope results. I. The shadow of the supermassive black hole" (PDF). The Astrophysical Journal Letters. 875 (1): L1. arXiv:1906.11238. Bibcode:2019ApJ...875L...1E. doi:10.3847/2041-8213/ab0ec7. S2CID 145906806.
Tamburini, F.; Thidé, B.; Della Valle, M. (November 2019). "Measurement of the spin of the M87 black hole from its observed twisted light". Monthly Notices of the Royal Astronomical Society Letters. 492 (1): L22–L27. arXiv:1904.07923. doi:10.1093/mnrasl/slz176.
Daly, R. A. (November 2019). "Black Hole Spin and Accretion Disk Magnetic Field Strength Estimates for More Than 750 Active Galactic Nuclei and Multiple Galactic Black Holes". The Astrophysical Journal. 886 (1): 37. arXiv:1905.11319. Bibcode:2019ApJ...886...37D. doi:10.3847/1538-4357/ab35e6.
Akiyama, Kazunori; et al. (Event Horizon Telescope Collaboration) (2021). "First M87 Event Horizon Telescope results. VII. Polarization of the ring". The Astrophysical Journal. 910 (1): L12. arXiv:2105.01169. Bibcode:2021ApJ...910L..12E. doi:10.3847/2041-8213/abe71d. S2CID 233851995.
Akiyama, Kazunori; et al. (Event Horizon Telescope Collaboration) (2021). "First M87 Event Horizon Telescope results. VIII. Magnetic field structure near the event horizon". The Astrophysical Journal. 910 (1): L13. arXiv:2105.01173. Bibcode:2021ApJ...910L..13E. doi:10.3847/2041-8213/abe4de. S2CID 233715131.
Medeiros, Lia; Psaltis, Dimitrios; Lauer, Tod R.; Özel, Feryal (April 2023). "The Image of the M87 Black Hole Reconstructed with PRIMO". The Astrophysical Journal Letters. 947 (1): L7. arXiv:2304.06079. Bibcode:2023ApJ...947L...7M. doi:10.3847/2041-8213/acc32d. ISSN 2041-8205.
Doeleman, S.S.; Fish, V.L.; Schenck, D.E.; Beaudoin, C.; Blundell, R.; Bower, G.C.; et al. (October 2012). "Jet-Launching Structure Resolved Near the Supermassive Black Hole in M87". Science. 338 (6105): 355–358. arXiv:1210.6132. Bibcode:2012Sci...338..355D. doi:10.1126/science.1224768. PMID 23019611. S2CID 37585603.
Kovalev, Y.Y.; Lister, M.L.; Homan, D. C.; Kellermann, K. I. (October 2007). "The inner jet of the radio galaxy M87". The Astrophysical Journal. 668 (1): L27–L30. arXiv:0708.2695. Bibcode:2007ApJ...668L..27K. doi:10.1086/522603. S2CID 16498888.
Tsvetanov, Z.I.; Hartig, G.F.; Ford, H.C.; Dopita, M.A.; Kriss, G.A.; Pei, Y.C.; et al. (February 1998). "M87: A misaligned BL Lacertae object?". The Astrophysical Journal. 493 (2): L83–L86. arXiv:astro-ph/9711241. Bibcode:1998ApJ...493L..83T. doi:10.1086/311139. S2CID 118576032.
Peterson, B.M. (26–30 June 2000). "Variability of active galactic nuclei". In Aretxaga, I.; Kunth, D.; Mújica, R. (eds.). Advanced Lectures on the Starburst-AGN Connection. Tonantzintla, Mexico: World Scientific. pp. 3–68. arXiv:astro-ph/0109495. Bibcode:2001sac..conf....3P. doi:10.1142/9789812811318_0002. ISBN 978-981-02-4616-7.
Harris, D.E.; Cheung, C.C.; Biretta, J.A.; Sparks, W.B.; Junor, W.; Perlman, E.S.; et al. (2006). "The Outburst of HST-1 in the M87 Jet". The Astrophysical Journal. 640 (1): 211–218. arXiv:astro-ph/0511755. Bibcode:2006ApJ...640..211H. doi:10.1086/500081. S2CID 17268539.
Harris, D. E.; Cheung, C. C.; Stawarz, L. (July 2009). "Variability time scales in the M87 Jet: Signatures of E squared losses, discovery of a quasi-period in HST-1, and the site of TeV flaring". The Astrophysical Journal. 699 (1): 305–314. arXiv:0904.3925. Bibcode:2009ApJ...699..305H. doi:10.1088/0004-637X/699/1/305. S2CID 14475336.
Owen, F.N.; Eilek, J.A.; Kassim, N.E. (November 2000). "M87 at 90 centimeters: A different picture". The Astrophysical Journal. 543 (2): 611–619. arXiv:astro-ph/0006150. Bibcode:2000ApJ...543..611O. doi:10.1086/317151. S2CID 15166238.
Werner, N.; Böhringer, H.; Kaastra, J. S.; de Plaa, J.; Simionescu, A.; Vink, J. (November 2006). "XMM-Newton high-resolution spectroscopy reveals the chemical evolution of M87". Astronomy and Astrophysics. 459 (2): 353–360. arXiv:astro-ph/0608177. Bibcode:2006A&A...459..353W. doi:10.1051/0004-6361:20065678. S2CID 18790420.
Werner, N.; Durret, F.; Ohashi, T.; Schindler, S.; Wiersma, R.P.C. (February 2008). "Observations of metals in the intra-cluster medium". Space Science Reviews. 134 (1–4): 337–362. arXiv:0801.1052. Bibcode:2008SSRv..134..337W. doi:10.1007/s11214-008-9320-9. S2CID 15906129.
Finoguenov, A.; Matsushita, K.; Böhringer, H.; Ikebe, Y.; Arnaud, M. (January 2002). "X-ray evidence for spectroscopic diversity of type Ia supernovae: XMM observation of the elemental abundance pattern in M87". Astronomy and Astrophysics. 381 (1): 21–31. arXiv:astro-ph/0110516. Bibcode:2002A&A...381...21F. doi:10.1051/0004-6361:20011477. S2CID 119426359.
Shi, Y.; Rieke, G.H.; Hines, D.C.; Gordon, K.D.; Egami, E. (2007). "Thermal and Nonthermal Infrared Emission from M87". The Astrophysical Journal. 655 (2): 781–789. arXiv:astro-ph/0610494. Bibcode:2007ApJ...655..781S. doi:10.1086/510188. S2CID 14424125.
Baes, M.; et al. (July 2010). "The Herschel Virgo Cluster Survey. VI. The far-infrared view of M87". Astronomy and Astrophysics. 518: L53. arXiv:1005.3059. Bibcode:2010A&A...518L..53B. doi:10.1051/0004-6361/201014555. S2CID 27004145.
Clemens, M. S.; et al. (July 2010). "The Herschel Virgo Cluster Survey. III. A constraint on dust grain lifetime in early-type galaxies". Astronomy and Astrophysics. 518: L50. arXiv:1005.3056. Bibcode:2010A&A...518L..50C. doi:10.1051/0004-6361/201014533. S2CID 119280598.
Harris, William E.; Harris, Gretchen L. H.; McLaughlin, Dean E. (May 1998). "M87, Globular Clusters, and Galactic Winds: Issues in Giant Galaxy Formation". The Astronomical Journal. 115 (5): 1801–1822. arXiv:astro-ph/9801214. Bibcode:1998AJ....115.1801H. doi:10.1086/300322. S2CID 119490384. The authors give a metallicity of:
${\begin{smallmatrix}\left[{\frac {Fe}{H}}\right]\ =\ -0.3\end{smallmatrix}}$
within a 3-kiloparsec radius of the galactic core.
Tamura, N.; Sharples, R.M.; Arimoto, N.; Onodera, M.; Ohta, K.; Yamada, Y. (2006). "A Subaru/Suprime-Cam wide-field survey of globular cluster populations around M87 – I. Observation, data analysis and luminosity function". Monthly Notices of the Royal Astronomical Society. 373 (2): 588–600. arXiv:astro-ph/0609067. Bibcode:2006MNRAS.373..588T. doi:10.1111/j.1365-2966.2006.11067.x. S2CID 15127905.
Madrid, J.P.; Harris, W.E.; Blakeslee, J.P.; Gómez, M. (2009). "Structural Parameters of the Messier 87 Globular Clusters". The Astrophysical Journal. 705 (1): 237–244. arXiv:0909.0272. Bibcode:2009ApJ...705..237M. doi:10.1088/0004-637X/705/1/237. S2CID 15019649. See Fig. 6. for a plot of the effective cluster radius versus galactocentric distance.
Caldwell, N.; Strader, J.; Romanowsky, A.J.; Brodie, J.P.; Moore, B.; Diemand, J.; et al. (May 2014). "A globular cluster toward M87 with a radial velocity < −1000 km/s: The first hypervelocity cluster". The Astrophysical Journal Letters. 787 (1): L11. arXiv:1402.6319. Bibcode:2014ApJ...787L..11C. doi:10.1088/2041-8205/787/1/L11. S2CID 116929202.
Zhang, H.X.; Peng, E.W.; Côté, P.; Liu, C.; Ferrarese, L.; Cuillandre, J.-C.; et al. (March 2015). "The Next Generation Virgo Cluster Survey. VI. The kinematics of ultra-compact dwarfs and globular clusters in M87". The Astrophysical Journal. 802 (1): 30. arXiv:1501.03167. Bibcode:2015ApJ...802...30Z. doi:10.1088/0004-637X/802/1/30. S2CID 73517961.
Côté, P.; et al. (July 2004). "The ACS Virgo Cluster Survey. I. Introduction to the survey". The Astrophysical Journal Supplement Series. 153 (1): 223–242. arXiv:astro-ph/0404138. Bibcode:2004ApJS..153..223C. doi:10.1086/421490. S2CID 18021414.

astronomy-mall.com (Global: low place; English: low place)

"Visual observations of the M87 jet". Adventures in Deep Space. Astronomy-Mall. Archived from the original on 7 July 2011. Retrieved 7 December 2010.

books.google.com (Global: 3^rd place; English: 3^rd place)

Hubble, E.P. (1936). The Realm of the Nebulae. Mrs. Hepsa Ely Silliman Memorial Lectures. Vol. 25. New Haven, CT: Yale University Press. ISBN 978-0-300-02500-2. OCLC 611263346. Archived from the original on 5 September 2015. {{cite book}}: ISBN / Date incompatibility (help)(pp. 16–17)

caltech.edu (Global: 887^th place; English: 714^th place)

ned.ipac.caltech.edu

"Results for NGC 4486". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 8 April 2019.
"Virgo cluster". NASA-IPAC Extragalactic Database (NED). NASA. Archived from the original on 10 November 2013. Retrieved 25 December 2012.

coolcosmos.ipac.caltech.edu

"M87–Giant Elliptical Galaxy". Cool Cosmos. Caltech. Archived from the original on 15 June 2018. Retrieved 22 March 2018.

discovery.com (Global: 1,299^th place; English: 903^rd place)

dsc.discovery.com

Klotz, I. (8 June 2009). "Galaxy's outer halo lopped off". Discovery. News. Archived from the original on 23 August 2009. Retrieved 25 April 2010.

doi.org (Global: 2^nd place; English: 2^nd place)

Lambert, S.B.; Gontier, A.-M. (January 2009). "On radio source selection to define a stable celestial frame". Astronomy and Astrophysics. 493 (1): 317–323. Bibcode:2009A&A...493..317L. doi:10.1051/0004-6361:200810582. See the tables in particular.
Cappellari, Michele; et al. (11 May 2011). "The ATLAS^3D project – I. A volume-limited sample of 260 nearby early-type galaxies: science goals and selection criteria". Monthly Notices of the Royal Astronomical Society. 413 (2): 813–836. arXiv:1012.1551. Bibcode:2011MNRAS.413..813C. doi:10.1111/j.1365-2966.2010.18174.x. S2CID 15391206.
Bird, S.; Harris, W.E.; Blakeslee, J. P.; Flynn, C. (December 2010). "The inner halo of M87: A first direct view of the red-giant population". Astronomy and Astrophysics. 524: A71. arXiv:1009.3202. Bibcode:2010A&A...524A..71B. doi:10.1051/0004-6361/201014876. S2CID 119281578.
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hdl.handle.net

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Akiyama, Kazunori; Lu, Ru-Sen; Fish, Vincent L; et al. (July 2015). "230 GHz VLBI observations of M87: Event-horizon-scale structure during an enhanced very-high-energy γ-ray state in 2012". The Astrophysical Journal. 807 (2): 150. arXiv:1505.03545. Bibcode:2015ApJ...807..150A. doi:10.1088/0004-637X/807/2/150. hdl:1721.1/98305. S2CID 50953437.

harvard.edu (Global: 18^th place; English: 17^th place)

ui.adsabs.harvard.edu

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${\begin{smallmatrix}\left[{\frac {Fe}{H}}\right]\ =\ -0.3\end{smallmatrix}}$
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${\begin{smallmatrix}\left[{\frac {Fe}{H}}\right]\ =\ -0.3\end{smallmatrix}}$
within a 3-kiloparsec radius of the galactic core.
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