Perseus OB1

Perseus OB1
	Double cluster at the heart of Per OB1 ; Credit: Chrisguidry
Observation data
Constellation	Perseus
Right ascension	02h 21m[1]
Declination	+57° 36′[1]
Mean distance	5.9 kly (1.8 kpc)[2]
Span	1,000 × 750 light years[3]
Radial velocity	−43.4[2] km/s
Physical characteristics
Members	149[4]
OB stars	≥65[5]
Other designations	Per OB1[6]

Perseus OB1 is an OB association in the Northern Celestial Hemisphere in the constellation Perseus. It is centered around the double cluster (NGC 869 and NGC 884),[4] and has lent its name to the Perseus Arm of the Milky Way.[7] The brightest member of the association is the blue supergiant 9 Persei.[3]

References

Sitnik, T. G. (May 2003). "The Line-of-Sight Velocities of OB Associations and Molecular Clouds in a Wide Solar Neighborhood: The Streaming Motions of Stars and Gas in the Perseus Arm". Astronomy Letters. 29: 311–320. Bibcode:2003AstL...29..311S. doi:10.1134/1.1573280.
Mel'Nik, A. M.; Dambis, A. K. (2009). "Kinematics of OB-associations and the new reduction of the Hipparcos data". Monthly Notices of the Royal Astronomical Society. 400 (1): 518. arXiv:0909.0618. Bibcode:2009MNRAS.400..518M. doi:10.1111/j.1365-2966.2009.15484.x.
Crossen, Craig; Rhemann, Gerald (2012). Sky Vistas: Astronomy for Binoculars and Richest-Field Telescopes. Springer Science & Business Media. p. 93. ISBN 9783709106266.
Lee, Hsu-Tai; Lim, Jeremy (June 2008). "On the Formation of Perseus OB1 at High Galactic Latitudes". The Astrophysical Journal. 679 (2): 1352–1363. arXiv:0804.4520. Bibcode:2008ApJ...679.1352L. doi:10.1086/587801.
Beech, Martin; Slawson, Robert W. (December 1995). "Are There Really Blue Stragglers in Per OB1?". Astrophysics and Space Science. 234 (2): 217–221. Bibcode:1995Ap&SS.234..217B. doi:10.1007/BF00627667.
"Per OB1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-15.
Inglis, Michael (2013). Observer’s Guide to Star Clusters. New York, New York: Springer Science & Business Media. p. 184. ISBN 978-1-4614-7567-5.

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[Sitnik2003-1] Sitnik, T. G. (May 2003). "The Line-of-Sight Velocities of OB Associations and Molecular Clouds in a Wide Solar Neighborhood: The Streaming Motions of Stars and Gas in the Perseus Arm". Astronomy Letters. 29: 311–320. Bibcode:2003AstL...29..311S. doi:10.1134/1.1573280.

[MelNik2009-2] Mel'Nik, A. M.; Dambis, A. K. (2009). "Kinematics of OB-associations and the new reduction of the Hipparcos data". Monthly Notices of the Royal Astronomical Society. 400 (1): 518. arXiv:0909.0618. Bibcode:2009MNRAS.400..518M. doi:10.1111/j.1365-2966.2009.15484.x.

[Craig2012-3] Crossen, Craig; Rhemann, Gerald (2012). Sky Vistas: Astronomy for Binoculars and Richest-Field Telescopes. Springer Science & Business Media. p. 93. ISBN 9783709106266.

[Lee2008-4] Lee, Hsu-Tai; Lim, Jeremy (June 2008). "On the Formation of Perseus OB1 at High Galactic Latitudes". The Astrophysical Journal. 679 (2): 1352–1363. arXiv:0804.4520. Bibcode:2008ApJ...679.1352L. doi:10.1086/587801.

[Beech1995-5] Beech, Martin; Slawson, Robert W. (December 1995). "Are There Really Blue Stragglers in Per OB1?". Astrophysics and Space Science. 234 (2): 217–221. Bibcode:1995Ap&SS.234..217B. doi:10.1007/BF00627667.

[SIMBAD-6] "Per OB1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-15.

[Inglis2013-7] Inglis, Michael (2013). Observer’s Guide to Star Clusters. New York, New York: Springer Science & Business Media. p. 184. ISBN 978-1-4614-7567-5.