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Omicron Arietis

March 11, 2023

Omicron Arietis, Latinised from ο Arietis, is the Bayer designation for a single,[2] blue-white-hued star in the northern constellation of Aries. It has an apparent visual magnitude of +5.78,[2] which means it is dimly visible to the naked eye. Based upon an annual parallax shift of 5.49 mas as seen from Earth,[1] it is located roughly 590 light-years from the Sun. At that distance, the visual magnitude of the star is diminished by an extinction factor of 0.22 due to interstellar dust.[10]

Omicron Arietis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Aries
Right ascension 02h 44m 32.97317s[1]
Declination +15° 18′ 42.7085″[1]
Apparent magnitude (V) +5.78[2]
Characteristics
Spectral type B9 Vn[3]
U−B color index −0.21[4]
B−V color index −0.01[4]
Astrometry
Radial velocity (Rv)−2.4±3.3[5] km/s
Proper motion (μ) RA: +3.25[1] mas/yr
Dec.: −14.87[1] mas/yr
Parallax (π)5.49 ± 0.32 mas[1]
Distance590 ± 30 ly
(180 ± 10 pc)
Absolute magnitude (MV)−0.51[6]
Details
Mass3.45±0.09[7] M☉
Radius3.1[8] R☉
Luminosity248[7] L☉
Temperature10,715[7] K
Rotational velocity (v sin i)225[9] km/s
Age286[10] Myr
Other designations
ο Ari, 37 Arietis, BD+14° 457, HD 17036, HIP 12803, HR 809, SAO 93082[11]
Database references
SIMBADdata

This is a B-type main-sequence star with a stellar classification of B9 Vn.[3] The 'n' suffix indicates that it has nebulous absorption lines in its spectrum, which are caused by the Doppler effect and rapid rotation. Indeed, it has a projected rotational velocity of 225 km/s.[9] The star has an estimated 3.45[7] times the mass of the Sun and about 3.1[8] times the Sun's radius. It is radiating energy from its photosphere at 248 times the Sun's luminosity with an effective temperature of 10,715 K.[7]

References

  1. ^ a b c d e f van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
  2. ^ a b c Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
  3. ^ a b Cowley, A. (November 1972), "Spectral classification of the bright B8 stars", Astronomical Journal, 77: 750–755, Bibcode:1972AJ.....77..750C, doi:10.1086/111348.
  4. ^ a b Crawford, D. L. (February 1963), "U, b, v, and Hβ Photometry for the Bright B8- and B9-TYPE Stars", Astrophysical Journal, 137: 530, Bibcode:1963ApJ...137..530C, doi:10.1086/147526.
  5. ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
  6. ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
  7. ^ a b c d e Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
  8. ^ a b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics (Third ed.), 367: 5211–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
  9. ^ a b Royer, F.; et al. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224, S2CID 18475298.
  10. ^ a b Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters, 38 (11): 694–706, arXiv:1606.09028, Bibcode:2012AstL...38..694G, doi:10.1134/S1063773712110035, S2CID 119108982.
  11. ^ "omi Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-09-28.

External links

  • HR 809
  • Image Omicron Arietis

March 11, 2023
omicron, arietis, latinised, from, arietis, bayer, designation, single, blue, white, hued, star, northern, constellation, aries, apparent, visual, magnitude, which, means, dimly, visible, naked, based, upon, annual, parallax, shift, seen, from, earth, located,. Omicron Arietis Latinised from o Arietis is the Bayer designation for a single 2 blue white hued star in the northern constellation of Aries It has an apparent visual magnitude of 5 78 2 which means it is dimly visible to the naked eye Based upon an annual parallax shift of 5 49 mas as seen from Earth 1 it is located roughly 590 light years from the Sun At that distance the visual magnitude of the star is diminished by an extinction factor of 0 22 due to interstellar dust 10 Omicron Arietis Observation dataEpoch J2000 0 Equinox J2000 0 ICRS Constellation AriesRight ascension 02h 44m 32 97317s 1 Declination 15 18 42 7085 1 Apparent magnitude V 5 78 2 CharacteristicsSpectral type B9 Vn 3 U B color index 0 21 4 B V color index 0 01 4 AstrometryRadial velocity Rv 2 4 3 3 5 km sProper motion m RA 3 25 1 mas yr Dec 14 87 1 mas yrParallax p 5 49 0 32 mas 1 Distance590 30 ly 180 10 pc Absolute magnitude MV 0 51 6 DetailsMass3 45 0 09 7 M Radius3 1 8 R Luminosity248 7 L Temperature10 715 7 KRotational velocity v sin i 225 9 km sAge286 10 MyrOther designationso Ari 37 Arietis BD 14 457 HD 17036 HIP 12803 HR 809 SAO 93082 11 Database referencesSIMBADdataThis is a B type main sequence star with a stellar classification of B9 Vn 3 The n suffix indicates that it has nebulous absorption lines in its spectrum which are caused by the Doppler effect and rapid rotation Indeed it has a projected rotational velocity of 225 km s 9 The star has an estimated 3 45 7 times the mass of the Sun and about 3 1 8 times the Sun s radius It is radiating energy from its photosphere at 248 times the Sun s luminosity with an effective temperature of 10 715 K 7 References Edit a b c d e f van Leeuwen F 2007 Validation of the new Hipparcos reduction Astronomy and Astrophysics 474 2 653 664 arXiv 0708 1752 Bibcode 2007A amp A 474 653V doi 10 1051 0004 6361 20078357 S2CID 18759600 a b c Eggleton P P Tokovinin A A 2008 A catalogue of multiplicity among bright stellar systems Monthly Notices of the Royal Astronomical Society 389 2 869 arXiv 0806 2878 Bibcode 2008MNRAS 389 869E doi 10 1111 j 1365 2966 2008 13596 x S2CID 14878976 a b Cowley A November 1972 Spectral classification of the bright B8 stars Astronomical Journal 77 750 755 Bibcode 1972AJ 77 750C doi 10 1086 111348 a b Crawford D L February 1963 U b v and Hb Photometry for the Bright B8 and B9 TYPE Stars Astrophysical Journal 137 530 Bibcode 1963ApJ 137 530C doi 10 1086 147526 de Bruijne J H J Eilers A C October 2012 Radial velocities for the HIPPARCOS Gaia Hundred Thousand Proper Motion project Astronomy amp Astrophysics 546 14 arXiv 1208 3048 Bibcode 2012A amp A 546A 61D doi 10 1051 0004 6361 201219219 S2CID 59451347 A61 Anderson E Francis Ch 2012 XHIP An extended hipparcos compilation Astronomy Letters 38 5 331 arXiv 1108 4971 Bibcode 2012AstL 38 331A doi 10 1134 S1063773712050015 S2CID 119257644 a b c d e Zorec J Royer F January 2012 Rotational velocities of A type stars IV Evolution of rotational velocities Astronomy amp Astrophysics 537 A120 arXiv 1201 2052 Bibcode 2012A amp A 537A 120Z doi 10 1051 0004 6361 201117691 S2CID 55586789 a b Pasinetti Fracassini L E et al February 2001 Catalogue of Apparent Diameters and Absolute Radii of Stars CADARS Astronomy and Astrophysics Third ed 367 5211 524 arXiv astro ph 0012289 Bibcode 2001A amp A 367 521P doi 10 1051 0004 6361 20000451 S2CID 425754 a b Royer F et al February 2007 Rotational velocities of A type stars III Velocity distributions Astronomy and Astrophysics 463 2 671 682 arXiv astro ph 0610785 Bibcode 2007A amp A 463 671R doi 10 1051 0004 6361 20065224 S2CID 18475298 a b Gontcharov G A November 2012 Spatial distribution and kinematics of OB stars Astronomy Letters 38 11 694 706 arXiv 1606 09028 Bibcode 2012AstL 38 694G doi 10 1134 S1063773712110035 S2CID 119108982 omi Ari SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved 2017 09 28 External links EditHR 809 Image Omicron Arietis Retrieved from https en wikipedia org w index php title Omicron Arietis amp oldid 1123320836, wikipedia, wiki, book, books, library,

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