49 Arietis

49 Arietis is a single[9] star in the northern constellation of Aries. 49 Arietis is the Flamsteed designation. It is visible to the naked eye as a faint, white hued star with an apparent visual magnitude of 5.90.[2] The star is located at a distance of about 218 light-years (67 parsecs) distant from Earth based on parallax.[1]

49 Arietis
Observation data
Epoch J2000      Equinox J2000
Constellation Aries
Right ascension 03h 01m 54.14148s[1]
Declination +26° 27′ 44.4799″[1]
Apparent magnitude (V) 5.90[2]
Characteristics
Spectral type kA2hA6mA7[3]
U−B color index +0.12[2]
B−V color index +0.141±0.006[4]
Astrometry
Radial velocity (Rv)−1.0[5] km/s
Proper motion (μ) RA: −14.509[1] mas/yr
Dec.: +4.810[1] mas/yr
Parallax (π)14.9367 ± 0.1377[1] mas
Distance218 ± 2 ly
(66.9 ± 0.6 pc)
Absolute magnitude (MV)1.87[4]
Details
Radius1.9[6] R☉
Luminosity14.99[4] L☉
Surface gravity (log g)4.34[7] cgs
Temperature8,424[7] K
Metallicity [Fe/H]–0.02[7] dex
Rotational velocity (v sin i)52[5] km/s
Other designations
49 Ari, NSV 1021, BD+25°477, HD 18769, HIP 14109, HR 905, SAO 75693[8]
Database references
SIMBADdata

This object is classified as an Am star,[10] or non-magnetic chemically peculiar star of the CP1[11] class, which means the spectrum displays abnormal abundances of certain heavier elements. It has a stellar classification of kA2hA6mA7,[3] which means it has the calcium K line of an A2 class star, the Hydrogen lines of an A6 star, and the metal lines of an A7 star. 49 Arietis has a moderately high rate of spin, showing a projected rotational velocity of 52 km/s,[5] and is radiating 15[4] times the luminosity of the Sun from its photosphere at an effective temperature of 8,424 K.[7]

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. Oja, T. (April 1983), "UBV photometry of FK4 and FK4 supplement stars", Astronomy and Astrophysics Supplement Series, 52: 131–134, Bibcode:1983A&AS...52..131O.
  3. Abt, Helmut A.; Morrell, Nidia I. (1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", Astrophysical Journal Supplement, 99: 135, Bibcode:1995ApJS...99..135A, doi:10.1086/192182.
  4. 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.
  5. Wielen, R.; et al. (1999), "Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions", Veroeffentlichungen des Astronomischen Rechen-Instituts Heidelberg, Astronomisches Rechen-Institut Heidelberg, 35 (35): 1, Bibcode:1999VeARI..35....1W.
  6. Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics (Third ed.), 367 (2): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
  7. Koleva, M.; Vazdekis, A. (February 2012), "Stellar population models in the UV. I. Characterisation of the New Generation Stellar Library", Astronomy & Astrophysics, 538: A143, arXiv:1111.5449, Bibcode:2012A&A...538A.143K, doi:10.1051/0004-6361/201118065, S2CID 53999614.
  8. "49 Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-06-03.
  9. 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.
  10. Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819.
  11. Paunzen, E.; et al. (February 2013), "A photometric study of chemically peculiar stars with the STEREO satellites - II. Non-magnetic chemically peculiar stars", Monthly Notices of the Royal Astronomical Society, 429 (1): 119–125, arXiv:1211.1535, Bibcode:2013MNRAS.429..119P, doi:10.1093/mnras/sts318, S2CID 119231581.
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