Astronomy:HD 24141

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Short description: Am star?; Camelopardalis
HD 24141
Camelopardalis constellation map.svg
Red circle.svg
Location of HD 24141 on the map (circled)
Observation data
Epoch J2000.0   Equinox (celestial coordinates)
Constellation Camelopardalis
Right ascension  03h 53m 43.28625s[1]
Declination +57° 58′ 30.5263″[1]
Apparent magnitude (V) 5.79±0.01[2]
Characteristics
Spectral type kA3hF0mF0[3] or A7 V[4]
U−B color index +0.11[5]
B−V color index +0.18[5]
Astrometry
Radial velocity (Rv)−0.2±0.6[6] km/s
Proper motion (μ) RA: +86.826[1] mas/yr
Dec.: −91.295[1] mas/yr
Parallax (π)18.5633 ± 0.0352[1] mas
Distance175.7 ± 0.3 ly
(53.9 ± 0.1 pc)
Absolute magnitude (MV)+2.28[7]
Position (relative to HD 24141A)
ComponentHD 24141B
Epoch of observationJ2000.0
Angular distance1.02″ [8]
Position angle69° [9]
Observed separation
(projected)		52.3 AU [8]
Details
A
Mass1.92[10] M☉
Radius1.72±0.09[11] R☉
Luminosity10.66±0.04[1] L☉
Surface gravity (log g)4.28+0.08−0.07[12] cgs
Temperature8,518±290[10] K
Metallicity [Fe/H]−0.02[13] dex
Rotational velocity (v sin i)53±10[14] km/s
Age15[10] Myr
B
Mass0.77[8] M☉
Other designations
BD+57°752, FK5 1105, GC 4668, HD 24141, HIP 18217, HR 1192, SAO 24276, WDS J03537+5759AB[15]
Database references
SIMBADdata

HD 24141, also known as HR 1192, is a star located in the northern constellation Camelopardalis, the giraffe. It is faintly visible to the naked eye as a white-hued point of light with an apparent magnitude of 5.79.[2] The object is located relatively close at a distance of 176 light-years based on Gaia DR3 parallax measurements[1] and it is slowly drifting closer with a heliocentric radial velocity of −0.2 km/s.[6] At its current distance, HD 24141's brightness is diminished by 0.17 magnitudes due to interstellar extinction[16] and it has an absolute magnitude of +2.28.[7]

It is not entirely certain whether HD 24141 is an Am star or not.[17] One stellar classification is kA3hF0mF0,[3] which indicates that it is an Am star with the calcium K-lines of an A3 star and the hydrogen and metallic lines of a F0 star. However, Abt & Levy (1985) gave a class of A7 V,[4] indicating that it is instead an ordinary A-type main-sequence star. HD 24141 has 1.92 times the mass of the Sun and it is estimated to be only 15 million years old.[10] It radiates 10.66 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 8,518 K.[10] These parameters correspond to a radius that is 72% larger than the Sun's.[11] HD 24141 has a near-solar metallicity at [Fe/H] = −0.02[13] and it spins modestly with a projected rotational velocity of 53 km/s.[14]

Most sources generally agree that HD 24141 is a solitary star.[18][4][19] A 2014 multiplicity survey found a 7th magnitude companion with a mass of 0.77 M☉[8] located 1.02" away from the star[8] along a position angle of 69°. Another 15th magnitude companion designated as C is located 1216″ away along a position angle of 187°.[20] The object appears to share the same proper motion as HD 24141,[9] but the Gaia DR3 parallax is different and it is considered very unlikely that the two are physically associated.[21]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. ISSN 0004-6361. Bibcode: 2000A&A...355L..27H. 
  3. ↑ 3.0 3.1 Sato, K.; Kuji, S. (November 1990). "MK classification and photometry of stars used for time and latitude observations at Mizusawa and Washington.". Astronomy and Astrophysics Supplement Series 85: 1069. ISSN 0365-0138. Bibcode: 1990A&AS...85.1069S. 
  4. ↑ 4.0 4.1 4.2 Abt, H. A.; Levy, S. G. (October 1985). "Improved study of metallic-line binaries". The Astrophysical Journal Supplement Series (American Astronomical Society) 59: 229. doi:10.1086/191070. ISSN 0067-0049. Bibcode: 1985ApJS...59..229A. 
  5. ↑ 5.0 5.1 Mendoza, E. E.; Gomez, V. T.; Gonzalez, S. (June 1978). "UBVRI photometry of 225 AM stars". The Astronomical Journal (American Astronomical Society) 83: 606. doi:10.1086/112242. ISSN 0004-6256. Bibcode: 1978AJ.....83..606M. 
  6. ↑ 6.0 6.1 Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. ISSN 1063-7737. Bibcode: 2006AstL...32..759G. 
  7. ↑ 7.0 7.1 Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A. 
  8. ↑ 8.0 8.1 8.2 8.3 8.4 De Rosa, R. J. et al. (26 November 2013). "The VAST Survey – III. The multiplicity of A-type stars within 75 pc". Monthly Notices of the Royal Astronomical Society 437 (2): 1216–1240. doi:10.1093/mnras/stt1932. ISSN 0035-8711. Bibcode: 2014MNRAS.437.1216D. 
  9. ↑ 9.0 9.1 Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal 122 (6): 3466–3471. doi:10.1086/323920. ISSN 0004-6256. Bibcode: 2001AJ....122.3466M. 
  10. ↑ 10.0 10.1 10.2 10.3 10.4 David, Trevor J.; Hillenbrand, Lynne A. (12 May 2015). "The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal 804 (2): 146. doi:10.1088/0004-637X/804/2/146. Bibcode: 2015ApJ...804..146D. 
  11. ↑ 11.0 11.1 Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants". Astronomy & Astrophysics 426 (1): 297–307. doi:10.1051/0004-6361:20035930. ISSN 0004-6361. Bibcode: 2004A&A...426..297K. 
  12. ↑ Stassun, Keivan G. et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S. 
  13. ↑ 13.0 13.1 Gontcharov, G. A. (December 2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters 38 (12): 771–782. doi:10.1134/S1063773712120031. ISSN 1063-7737. Bibcode: 2012AstL...38..771G. 
  14. ↑ 14.0 14.1 Abt, Helmut A.; Morrell, Nidia I. (July 1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". The Astrophysical Journal Supplement Series 99: 135. doi:10.1086/192182. ISSN 0067-0049. Bibcode: 1995ApJS...99..135A. 
  15. ↑ "HD 24141". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+24141. 
  16. ↑ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society 472 (4): 3805–3820. doi:10.1093/mnras/stx2219. ISSN 0035-8711. Bibcode: 2017MNRAS.472.3805G. 
  17. ↑ Renson, P.; Manfroid, J. (19 March 2009). "Catalogue of Ap, HgMn and Am stars". Astronomy & Astrophysics 498 (3): 961–966. doi:10.1051/0004-6361/200810788. ISSN 0004-6361. Bibcode: 2009A&A...498..961R. 
  18. ↑ Abt, Helmut A. (1961). "The Frequency of Binaries among Metalmc-Line Stars.". The Astrophysical Journal Supplement Series (American Astronomical Society) 6: 37. doi:10.1086/190060. ISSN 0067-0049. Bibcode: 1961ApJS....6...37A. 
  19. ↑ Eggleton, P. P.; Tokovinin, A. A. (11 September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society 389 (2): 869–879. doi:10.1111/j.1365-2966.2008.13596.x. ISSN 0035-8711. Bibcode: 2008MNRAS.389..869E. 
  20. ↑ Tokovinin, Andrei; Lépine, Sébastien (2012). "Wide Companions to Hipparcos Stars within 67 pc of the Sun". The Astronomical Journal 144 (4): 102. doi:10.1088/0004-6256/144/4/102. Bibcode: 2012AJ....144..102T. 
  21. ↑ Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.



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