Μεσιέ 4 (Greek Wikipedia)

Analysis of information sources in references of the Wikipedia article "Μεσιέ 4" in Greek language version.

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archive.org

Caputo, F.; Castellani, V.; Quarta, M. L. (February 1985). «Reddening, distance modulus and age of the globular cluster NGC 6121 (M4) from the properties of RR Lyrae variables». Astronomy and Astrophysics 143 (1): 8-12. Bibcode: 1985A&A...143....8C. https://archive.org/details/sim_astronomy-and-astrophysics_1985-02_143_1/page/8.
Dinescu, Dana I.; Girard, Terrence M.; van Altena, William F. (April 1999). «Space Velocities of Globular Clusters. III. Cluster Orbits and Halo Substructure». The Astronomical Journal 117 (4): 1792-1815. doi:10.1086/300807. Bibcode: 1999AJ....117.1792D. https://archive.org/details/sim_astronomical-journal_1999-04_117_4/page/1792.

doi.org

dx.doi.org

Marino, A. F.; et al. (November 2008). «Spectroscopic and photometric evidence of two stellar populations in the Galactic globular cluster NGC 6121 (M 4)». Astronomy and Astrophysics 490 (2): 625–640. doi:10.1051/0004-6361:200810389. Bibcode: 2008A&A...490..625M.
Dinescu, Dana I.; Girard, Terrence M.; van Altena, William F. (April 1999). «Space Velocities of Globular Clusters. III. Cluster Orbits and Halo Substructure». The Astronomical Journal 117 (4): 1792-1815. doi:10.1086/300807. Bibcode: 1999AJ....117.1792D. https://archive.org/details/sim_astronomical-journal_1999-04_117_4/page/1792.

harvard.edu

adsabs.harvard.edu

Caputo, F.; Castellani, V.; Quarta, M. L. (February 1985). «Reddening, distance modulus and age of the globular cluster NGC 6121 (M4) from the properties of RR Lyrae variables». Astronomy and Astrophysics 143 (1): 8-12. Bibcode: 1985A&A...143....8C. https://archive.org/details/sim_astronomy-and-astrophysics_1985-02_143_1/page/8.
Marino, A. F.; et al. (November 2008). «Spectroscopic and photometric evidence of two stellar populations in the Galactic globular cluster NGC 6121 (M 4)». Astronomy and Astrophysics 490 (2): 625–640. doi:10.1051/0004-6361:200810389. Bibcode: 2008A&A...490..625M.
Dinescu, Dana I.; Girard, Terrence M.; van Altena, William F. (April 1999). «Space Velocities of Globular Clusters. III. Cluster Orbits and Halo Substructure». The Astronomical Journal 117 (4): 1792-1815. doi:10.1086/300807. Bibcode: 1999AJ....117.1792D. https://archive.org/details/sim_astronomical-journal_1999-04_117_4/page/1792.

u-strasbg.fr

simbad.u-strasbg.fr

«M 4 -- Globular Cluster». SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Ανακτήθηκε στις 25 Μαρτίου 2010.