HD 46588

Last updated
HD 46588
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Camelopardalis [1]
A
Right ascension 06h 46m 14.1500s [2]
Declination +79° 33′ 53.319″ [2]
Apparent magnitude  (V)+5.44 [1]
B
Right ascension 06h 46m 27.5604s [3]
Declination +79° 35′ 04.513″ [3]
Characteristics
Spectral type F7 V [4] + L9 [5]
U−B color index −0.02 [6]
B−V color index +0.53 [6]
Astrometry
A
Radial velocity (Rv)15.30±0.13 [2] km/s
Proper motion (μ)RA: −99.163 mas/yr [2]
Dec.: −604.042 mas/yr [2]
Parallax (π)54.9380±0.0595  mas [2]
Distance 59.37 ± 0.06  ly
(18.20 ± 0.02  pc)
Absolute magnitude  (MV)+4.18 [1]
Details
A
Mass 1.13+0.03
−0.02 [7]   M☉
Radius 1.16±0.04 [8]   R☉
Luminosity 1.82 [9]   L☉
Surface gravity (log g)4.40±0.02 [7]   cgs
Temperature 6,273±91 [7]   K
Metallicity [Fe/H]−0.12±0.06 [7]   dex
Rotation 10.3  d [8]
Rotational velocity (v sin i)2.50±1.74 [8]  km/s
Age 1.27+1.65
−0.22 [7]   Gyr
B
Mass 0.064+0.008
−0.019  M☉
Temperature 1360+50
−80  K
Other designations
23 H. Camelopardalis, AG+79°200, BD+79°212, GC 8711, GJ 240.1, HD 46588, HIP 32439, HR 2401, SAO 5946, WDS J06462+7934 [10]
Database references
SIMBAD A
B

HD 46588 (HR 2401; Gliese 240.1) is a star with a brown dwarf companion in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.44, [1] allowing it to be faintly seen with the naked eye. The object is relatively close at a distance of only 59 light-years [2] but is receding with a heliocentric radial velocity of 15  km/s . [11]

HD 46588 is an ordinary F-type main-sequence star with a spectral classification of F7 V. [4] It has 113% the mass of the Sun [7] and 119% its radius. [9] It shines at 182% the luminosity of the Sun [9] from its photosphere at an effective temperature of 6,273 K, [7] giving it a yellow white glow. Isochronic measurements place HD 46588's age at 1.27 billion years, [7] but it is poorly constrained. The star's metallicity is 76% that of the Sun [7] and spins modestly with a projected rotational velocity of 6.63  km/s . [12]

Due to the star's close proximity to Earth and similarity to the Sun, it has been well studied by astronomers. [5] A brown dwarf companion, HD 46588 B, was discovered in a WISE survey in 2011, at a distance of 1420  AU from the primary. It has a mass of 67+8
−20  Jupiter masses and a temperature of 1360+50
−80 K. [5] An infrared excess has been discovered around HD 46588, indicating a cold debris disk with a temperature of 60 K. [13] In addition, a 2022 study detected a candidate planet around the star using the radial velocity method. [8]

The HD 46588 A planetary system [13] [8]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b(unconfirmed)≥0.25+0.06
−0.04 MJ 		—223±30.42+0.19
−0.14		——
dust disk26.34 AU ——

References

  1. 1 2 3 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. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 6 7 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 Cutri, R. M.; Skrutskie, M. F.; Van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T.; Fowler, J.; Gizis, J.; Howard, E.; Huchra, J.; Jarrett, T.; Kopan, E. L.; Kirkpatrick, J. D.; Light, R. M.; Marsh, K. A.; McCallon, H.; Schneider, S.; Stiening, R.; Sykes, M.; Weinberg, M.; Wheaton, W. A.; Wheelock, S.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". Vizier Online Data Catalog. Bibcode:2003yCat.2246....0C.
  4. 1 2 Abt, Helmut A. (23 December 2008). "Mk Classifications of Spectroscopic Binaries". The Astrophysical Journal Supplement Series. 180 (1): 117–118. Bibcode:2009ApJS..180..117A. doi: 10.1088/0067-0049/180/1/117 . eISSN   1538-4365. ISSN   0067-0049.
  5. 1 2 3 Loutrel, N. P.; Luhman, K. L.; Lowrance, P. J.; Bochanski, J. J. (12 September 2011). "DISCOVERY OF A COMPANION AT THE L/T TRANSITION WITH THE<i>WIDE-FIELD INFRARED SURVEY EXPLORER</i>". The Astrophysical Journal. 739 (2): 81. arXiv: 1107.1812 . Bibcode:2011ApJ...739...81L. doi: 10.1088/0004-637X/739/2/81 . eISSN   1538-4357. ISSN   0004-637X.
  6. 1 2 Cowley, A. P.; Hiltner, W. A.; Witt, A. N. (December 1967). "Spectral classification and photometry of high proper motion stars". The Astronomical Journal. 72: 1334. Bibcode:1967AJ.....72.1334C. doi: 10.1086/110413 . ISSN   0004-6256.
  7. 1 2 3 4 5 6 7 8 9 Aguilera-Gómez, Claudia; Ramírez, Iván; Chanamé, Julio (June 2018). "Lithium abundance patterns of late-F stars: an in-depth analysis of the lithium desert". Astronomy & Astrophysics. 614: A55. arXiv: 1803.05922 . Bibcode:2018A&A...614A..55A. doi: 10.1051/0004-6361/201732209 . eISSN   1432-0746. ISSN   0004-6361.
  8. 1 2 3 4 5 Šubjak, J.; Lodieu, N.; et al. (March 2023). "Search for planets around stars with wide brown dwarfs". Astronomy & Astrophysics . 671: A10. arXiv: 2212.03757 . Bibcode:2023A&A...671A..10S. doi:10.1051/0004-6361/202244238.
  9. 1 2 3 Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694 . Bibcode:2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467 . ISSN   0004-6256.
  10. ↑ "HD 46588". SIMBAD . Centre de données astronomiques de Strasbourg.
  11. ↑ 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. arXiv: 1606.08053 . Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. eISSN   1562-6873. ISSN   1063-7737. S2CID   119231169.
  12. ↑ Martínez-Arnáiz, R.; Maldonado, J.; Montes, D.; Eiroa, C.; Montesinos, B. (September 2010). "Chromospheric activity and rotation of FGK stars in the solar vicinity". Astronomy and Astrophysics. 520: A79. arXiv: 1002.4391 . Bibcode:2010A&A...520A..79M. doi: 10.1051/0004-6361/200913725 . eISSN   1432-0746. ISSN   0004-6361.
  13. 1 2 Gáspár, András; Rieke, George H.; Ballering, Nicholas (29 July 2016). "The Correlation Between Metallicity and Debris Disk Mass". The Astrophysical Journal. 826 (2): 171. arXiv: 1604.07403 . Bibcode:2016ApJ...826..171G. doi: 10.3847/0004-637X/826/2/171 . eISSN   1538-4357.
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