HD 46588

HD 46588
Location of HD 46588 (circled in red)
Observation data
Epoch J2000.0      Equinox ICRS
Constellation Camelopardalis
A
Right ascension 06h 46m 14.1500s
Declination +79° 33′ 53.319″
Apparent magnitude (V) +5.44
B
Right ascension 06h 46m 27.5604s
Declination +79° 35′ 04.513″
Characteristics
A
Evolutionary stage main sequence
Spectral type F7 V
U−B color index −0.02
B−V color index +0.53
B
Evolutionary stage brown dwarf
Spectral type L9
Astrometry
A
Radial velocity (Rv)15.30±0.13 km/s
Proper motion (μ) RA: −99.163 mas/yr
Dec.: −604.042 mas/yr
Parallax (π)54.9380±0.0595 mas
Distance59.37 ± 0.06 ly
(18.20 ± 0.02 pc)
Absolute magnitude (MV)+4.18
Details
A
Mass1.13+0.03
−0.02 M☉
Radius1.16±0.04 R☉
Luminosity1.82 L☉
Surface gravity (log g)4.40±0.02 cgs
Temperature6,273±91 K
Metallicity [Fe/H]−0.12±0.06 dex
Rotation10.3 d
Rotational velocity (v sin i)2.50±1.74 km/s
Age1.27+1.65
−0.22 Gyr
B
Mass0.064+0.008
−0.019 M☉
Temperature1360+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
Database references
SIMBADA
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, allowing it to be faintly seen with the naked eye. The object is relatively close at a distance of only 59 light-years but is receding with a heliocentric radial velocity of 15 km/s.

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

Due to the star's close proximity to Earth and similarity to the Sun, it has been well studied by astronomers. 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. An infrared excess has been discovered around HD 46588, indicating a cold debris disk with a temperature of 60 K. In addition, a 2022 study detected a candidate planet around the star using the radial velocity method.

The HD 46588 A planetary system
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±3 0.42+0.19
−0.14		 — —
dust disk 26.34 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 8 9 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 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.
  6. 1 2 3 Loutrel, N. P.; Luhman, K. L.; Lowrance, P. J.; Bochanski, J. J. (2011). "Discovery of a Companion at the L/T Transition with the Wide-field Infrared Survey Explorer". The Astrophysical Journal. 739 (2): 81. arXiv:1107.1812. Bibcode:2011ApJ...739...81L. doi:10.1088/0004-637X/739/2/81.
  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.