Astronomy:Perseus OB1
From HandWiki
| Perseus OB1 | |
|---|---|
 Double cluster at the heart of Per OB1 Credit: Chrisguidry | |
| Observation data (J2000 epoch) | |
| Constellation | Perseus |
| Right ascension | 02h 21m[1][2] |
| Declination | +57.6°[1][2] |
| Mean distance | 6.0 kly (1.83 kpc)[3] |
| Span | 1,000 × 750 light years[4] |
| Radial velocity | −43.4[5] km/s |
| Physical characteristics | |
| Members | 149[6] |
| OB stars | ≥65[7] |
| Other designations | Per OB1[1] |
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),[6] and has lent its name to the Perseus Arm of the Milky Way.[8] The brightest member of the association is the blue supergiant 9 Persei.[4]
References
- ↑ 1.0 1.1 1.2 "Per OB1". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Per+OB1.
- ↑ 2.0 2.1 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 (5): 311–320. doi:10.1134/1.1573280. Bibcode: 2003AstL...29..311S.
- ↑ Melnik, A. M.; Dambis, A. K. (2020). "Distance scale for high-luminosity stars in OB associations and in field with Gaia DR2. Spurious systematic motions". Astrophysics and Space Science 365 (7): 112. doi:10.1007/s10509-020-03827-0. Bibcode: 2020Ap&SS.365..112M.
- ↑ 4.0 4.1 Crossen, Craig; Rhemann, Gerald (2012). Sky Vistas: Astronomy for Binoculars and Richest-Field Telescopes. Springer Science & Business Media. p. 93. ISBN 9783709106266. https://books.google.com/books?id=3vELBwAAQBAJ&pg=PA93.
- ↑ 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. doi:10.1111/j.1365-2966.2009.15484.x. Bibcode: 2009MNRAS.400..518M.
- ↑ 6.0 6.1 Lee, Hsu-Tai; Lim, Jeremy (June 2008). "On the Formation of Perseus OB1 at High Galactic Latitudes". The Astrophysical Journal 679 (2): 1352–1363. doi:10.1086/587801. Bibcode: 2008ApJ...679.1352L.
- ↑ Beech, Martin; Slawson, Robert W. (December 1995). "Are There Really Blue Stragglers in Per OB1?". Astrophysics and Space Science 234 (2): 217–221. doi:10.1007/BF00627667. Bibcode: 1995Ap&SS.234..217B.
- ↑ 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. https://books.google.com/books?id=ewHABAAAQBAJ&pg=PA184.
 |  |
