Lacour, S.; Thiébaut, E.; Perrin, G.; Meimon, S.; Haubois, X.; Pedretti, E.; Ridgway, S. T.; Monnier, J. D.; Berger, J. P.; Schuller, P. A.; Woodruff, H.; Poncelet, A.; Le Coroller, H.; Millan-Gabet, R.; Lacasse, M.; Traub, W. (2009). «The Pulsation of χ Cygni Imaged by Optical Interferometry: A Novel Technique to Derive Distance and Mass of Mira Stars». The Astrophysical Journal. 707. 632 páginas. Bibcode:2009ApJ...707..632L. arXiv:0910.3869. doi:10.1088/0004-637X/707/1/632
Justtanont, K.; Decin, L.; Schöier, F. L.; Maercker, M.; Olofsson, H.; Bujarrabal, V.; Marston, A. P.; Teyssier, D.; Alcolea, J.; Cernicharo, J.; Dominik, C.; De Koter, A.; Melnick, G.; Menten, K.; Neufeld, D.; Planesas, P.; Schmidt, M.; Szczerba, R.; Waters, R.; De Graauw, Th.; Whyborn, N.; Finn, T.; Helmich, F.; Siebertz, O.; Schmülling, F.; Ossenkopf, V.; Lai, R. (2010). «A HIFI preview of warm molecular gas around χ Cygni: First detection of H2O emission toward an S-type AGB star». Astronomy and Astrophysics. 521: L6. Bibcode:2010A&A...521L...6J. arXiv:1007.1536. doi:10.1051/0004-6361/201015092
Forestini, M; Charbonnel, C (1997). «Nucleosynthesis of light elements inside thermally pulsing AGB stars: I. The case of intermediate-mass stars». Astronomy and Astrophysics Supplement Series. 123 (2). 241 páginas. Bibcode:1997A&AS..123..241F. arXiv:astro-ph/9608153. doi:10.1051/aas:1997348
Keenan, P. C.; Boeshaar, P. C. (1980). «Spectral types of S and SC stars on the revised MK system». Astrophysical Journal Supplement Series. 43. 379 páginas. Bibcode:1980ApJS...43..379K. doi:10.1086/190673
Keenan, Philip C.; Garrison, Robert F.; Deutsch, Armin J. (1974). «Revised Catalog of Spectra of Mira Variables of Types ME and Se». Astrophysical Journal Supplement. 28. 271 páginas. Bibcode:1974ApJS...28..271K. doi:10.1086/190318
Lacour, S.; Thiébaut, E.; Perrin, G.; Meimon, S.; Haubois, X.; Pedretti, E.; Ridgway, S. T.; Monnier, J. D.; Berger, J. P.; Schuller, P. A.; Woodruff, H.; Poncelet, A.; Le Coroller, H.; Millan-Gabet, R.; Lacasse, M.; Traub, W. (2009). «The Pulsation of χ Cygni Imaged by Optical Interferometry: A Novel Technique to Derive Distance and Mass of Mira Stars». The Astrophysical Journal. 707. 632 páginas. Bibcode:2009ApJ...707..632L. arXiv:0910.3869. doi:10.1088/0004-637X/707/1/632
Davis, Dorothy N. (1934). «The Spectral Sequence in Stars of Class S». Publications of the Astronomical Society of the Pacific. 46. 267 páginas. Bibcode:1934PASP...46..267D. doi:10.1086/124485
Cameron, D. M.; Nassau, J. J. (1955). «Classification of Late M-Type Stars from Low-Dispersion Spectra in the Near Infrared». Astrophysical Journal. 122. 177 páginas. Bibcode:1955ApJ...122..177C. doi:10.1086/146066
Snyder, L. E.; Buhl, D. (1975). «Detection of new stellar sources of vibrationally excited silicon monoxide maser emission at 6.95 millimeters». Astrophysical Journal. 197. 329 páginas. Bibcode:1975ApJ...197..329S. doi:10.1086/153517
Justtanont, K.; Decin, L.; Schöier, F. L.; Maercker, M.; Olofsson, H.; Bujarrabal, V.; Marston, A. P.; Teyssier, D.; Alcolea, J.; Cernicharo, J.; Dominik, C.; De Koter, A.; Melnick, G.; Menten, K.; Neufeld, D.; Planesas, P.; Schmidt, M.; Szczerba, R.; Waters, R.; De Graauw, Th.; Whyborn, N.; Finn, T.; Helmich, F.; Siebertz, O.; Schmülling, F.; Ossenkopf, V.; Lai, R. (2010). «A HIFI preview of warm molecular gas around χ Cygni: First detection of H2O emission toward an S-type AGB star». Astronomy and Astrophysics. 521: L6. Bibcode:2010A&A...521L...6J. arXiv:1007.1536. doi:10.1051/0004-6361/201015092
Herbig, George H. (1956). «Identification of Aluminum Hydride as the Emitter of Bright Lines Observed in χ Cygni Near Minimum Light». Publications of the Astronomical Society of the Pacific. 68. 204 páginas. Bibcode:1956PASP...68..204H. doi:10.1086/126916
Stein, John W. (1991). «Multichannel astrometric photometer-based parallaxes of evolved stars – Chi Cygni, 51 Andromedae, and OP Andromedae». Astrophysical Journal. 377. 669 páginas. Bibcode:1991ApJ...377..669S. doi:10.1086/170394
Hinkle, K. H.; Hall, D. N. B.; Ridgway, S. T. (1982). «Time series infrared spectroscopy of the Mira variable Chi Cygni». Astrophysical Journal. 252. 697 páginas. Bibcode:1982ApJ...252..697H. doi:10.1086/159596
Vanture, Andrew D.; Wallerstein, George; Brown, Jeffrey A.; Bazan, Grant (1991). «Abundances of TC and related elements in stars of type M, MS, and S». Astrophysical Journal. 381. 278 páginas. Bibcode:1991ApJ...381..278V. doi:10.1086/170649
Schöier, F. L.; Maercker, M.; Justtanont, K.; Olofsson, H.; Black, J. H.; Decin, L.; De Koter, A.; Waters, R. (2011). «A chemical inventory of the S-type AGB star χ Cygni based on Herschel/HIFI observations of circumstellar line emission. The importance of non-LTE chemical processes in a dynamical region». Astronomy & Astrophysics. 530: A83. Bibcode:2011A&A...530A..83S. doi:10.1051/0004-6361/201116597
Percy, John R.; Au, Winnie W.-Y. (1999). «Long-Term Changes in Mira Stars. II. A Search for Evolutionary Period Changes in Mira Stars». The Publications of the Astronomical Society of the Pacific. 111 (755). 98 páginas. Bibcode:1999PASP..111...98P. doi:10.1086/316303
Boothroyd, Arnold I.; Sackmann, I.-Juliana; Ahern, Sean C. (1993). «Prevention of High-Luminosity Carbon Stars by Hot Bottom Burning». Astrophysical Journal. 416. 762 páginas. Bibcode:1993ApJ...416..762B. doi:10.1086/173275
Forestini, M; Charbonnel, C (1997). «Nucleosynthesis of light elements inside thermally pulsing AGB stars: I. The case of intermediate-mass stars». Astronomy and Astrophysics Supplement Series. 123 (2). 241 páginas. Bibcode:1997A&AS..123..241F. arXiv:astro-ph/9608153. doi:10.1051/aas:1997348
harvard.edu
ui.adsabs.harvard.edu
Samus, N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (janeiro de 2009). «VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+, 2007-2017)». VizieR On-line Data Catalog: B/gcvs. Bibcode:2009yCat....102025S !CS1 manut: Nomes múltiplos: lista de autores (link)
Keenan, P. C.; Boeshaar, P. C. (1980). «Spectral types of S and SC stars on the revised MK system». Astrophysical Journal Supplement Series. 43. 379 páginas. Bibcode:1980ApJS...43..379K. doi:10.1086/190673
Keenan, Philip C.; Garrison, Robert F.; Deutsch, Armin J. (1974). «Revised Catalog of Spectra of Mira Variables of Types ME and Se». Astrophysical Journal Supplement. 28. 271 páginas. Bibcode:1974ApJS...28..271K. doi:10.1086/190318
Oja, T. (2011). «Photoelectric UBV photometry of variable stars observed during the years 1961–1999». The Journal of Astronomical Data. 17. Bibcode:2011JAD....17....1O
Lacour, S.; Thiébaut, E.; Perrin, G.; Meimon, S.; Haubois, X.; Pedretti, E.; Ridgway, S. T.; Monnier, J. D.; Berger, J. P.; Schuller, P. A.; Woodruff, H.; Poncelet, A.; Le Coroller, H.; Millan-Gabet, R.; Lacasse, M.; Traub, W. (2009). «The Pulsation of χ Cygni Imaged by Optical Interferometry: A Novel Technique to Derive Distance and Mass of Mira Stars». The Astrophysical Journal. 707. 632 páginas. Bibcode:2009ApJ...707..632L. arXiv:0910.3869. doi:10.1088/0004-637X/707/1/632
Bujarrabal, V.; Planesas, P.; Del Romero, A. (1987). «SiO maser emission in evolved stars – Relation to IR continuum». Astronomy and Astrophysics. 175. 164 páginas. Bibcode:1987A&A...175..164B
Sterken, C.; Broens, E.; Koen, C. (1999). «On the period history of chi Cygni». Astronomy and Astrophysics. 342. 167 páginas. Bibcode:1999A&A...342..167S
Sterken, C.; Broens, E. (1998). «Long-term visual magnitude estimates of the Mira variable chi Cygni. I. 1686–1900». The Journal of Astronomical Data. 4. Bibcode:1998JAD.....4....7S
Davis, Dorothy N. (1934). «The Spectral Sequence in Stars of Class S». Publications of the Astronomical Society of the Pacific. 46. 267 páginas. Bibcode:1934PASP...46..267D. doi:10.1086/124485
Cameron, D. M.; Nassau, J. J. (1955). «Classification of Late M-Type Stars from Low-Dispersion Spectra in the Near Infrared». Astrophysical Journal. 122. 177 páginas. Bibcode:1955ApJ...122..177C. doi:10.1086/146066
Snyder, L. E.; Buhl, D. (1975). «Detection of new stellar sources of vibrationally excited silicon monoxide maser emission at 6.95 millimeters». Astrophysical Journal. 197. 329 páginas. Bibcode:1975ApJ...197..329S. doi:10.1086/153517
Justtanont, K.; Decin, L.; Schöier, F. L.; Maercker, M.; Olofsson, H.; Bujarrabal, V.; Marston, A. P.; Teyssier, D.; Alcolea, J.; Cernicharo, J.; Dominik, C.; De Koter, A.; Melnick, G.; Menten, K.; Neufeld, D.; Planesas, P.; Schmidt, M.; Szczerba, R.; Waters, R.; De Graauw, Th.; Whyborn, N.; Finn, T.; Helmich, F.; Siebertz, O.; Schmülling, F.; Ossenkopf, V.; Lai, R. (2010). «A HIFI preview of warm molecular gas around χ Cygni: First detection of H2O emission toward an S-type AGB star». Astronomy and Astrophysics. 521: L6. Bibcode:2010A&A...521L...6J. arXiv:1007.1536. doi:10.1051/0004-6361/201015092
Mattei, Janet Akyuz (1997). «Introducing Mira Variables». The Journal of the American Association of Variable Star Observers. 25. 57 páginas. Bibcode:1997JAVSO..25...57M
Herbig, George H. (1956). «Identification of Aluminum Hydride as the Emitter of Bright Lines Observed in χ Cygni Near Minimum Light». Publications of the Astronomical Society of the Pacific. 68. 204 páginas. Bibcode:1956PASP...68..204H. doi:10.1086/126916
Stein, John W. (1991). «Multichannel astrometric photometer-based parallaxes of evolved stars – Chi Cygni, 51 Andromedae, and OP Andromedae». Astrophysical Journal. 377. 669 páginas. Bibcode:1991ApJ...377..669S. doi:10.1086/170394
Hinkle, K. H.; Hall, D. N. B.; Ridgway, S. T. (1982). «Time series infrared spectroscopy of the Mira variable Chi Cygni». Astrophysical Journal. 252. 697 páginas. Bibcode:1982ApJ...252..697H. doi:10.1086/159596
Perryman, M. A. C.; Lindegren, L.; Kovalevsky, J.; Hoeg, E.; Bastian, U.; Bernacca, P. L.; Crézé, M.; Donati, F.; Grenon, M.; Grewing, M.; Van Leeuwen, F.; Van Der Marel, H.; Mignard, F.; Murray, C. A.; Le Poole, R. S.; Schrijver, H.; Turon, C.; Arenou, F.; Froeschlé, M.; Petersen, C. S. (1997). «The HIPPARCOS Catalogue». Astronomy and Astrophysics. 323: L49. Bibcode:1997A&A...323L..49P
Vanture, Andrew D.; Wallerstein, George; Brown, Jeffrey A.; Bazan, Grant (1991). «Abundances of TC and related elements in stars of type M, MS, and S». Astrophysical Journal. 381. 278 páginas. Bibcode:1991ApJ...381..278V. doi:10.1086/170649
Schöier, F. L.; Maercker, M.; Justtanont, K.; Olofsson, H.; Black, J. H.; Decin, L.; De Koter, A.; Waters, R. (2011). «A chemical inventory of the S-type AGB star χ Cygni based on Herschel/HIFI observations of circumstellar line emission. The importance of non-LTE chemical processes in a dynamical region». Astronomy & Astrophysics. 530: A83. Bibcode:2011A&A...530A..83S. doi:10.1051/0004-6361/201116597
Marigo, P.; Bressan, A.; Chiosi, C. (1996). «The TP-AGB phase: A new model». Astronomy and Astrophysics. 313. 545 páginas. Bibcode:1996A&A...313..545M
Percy, John R.; Au, Winnie W.-Y. (1999). «Long-Term Changes in Mira Stars. II. A Search for Evolutionary Period Changes in Mira Stars». The Publications of the Astronomical Society of the Pacific. 111 (755). 98 páginas. Bibcode:1999PASP..111...98P. doi:10.1086/316303
Boothroyd, Arnold I.; Sackmann, I.-Juliana; Ahern, Sean C. (1993). «Prevention of High-Luminosity Carbon Stars by Hot Bottom Burning». Astrophysical Journal. 416. 762 páginas. Bibcode:1993ApJ...416..762B. doi:10.1086/173275
Forestini, M; Charbonnel, C (1997). «Nucleosynthesis of light elements inside thermally pulsing AGB stars: I. The case of intermediate-mass stars». Astronomy and Astrophysics Supplement Series. 123 (2). 241 páginas. Bibcode:1997A&AS..123..241F. arXiv:astro-ph/9608153. doi:10.1051/aas:1997348
u-strasbg.fr
simbad.u-strasbg.fr
«* chi Cyg -- S Star». SIMBAD. Centre de Données astronomiques de Strasbourg. Consultado em 7 de julho de 2018