Astronomy:HD 46588
| Observation data {{#ifeq:J2000.0 (ICRS)|J2000.0 (ICRS)|Epoch J2000.0 Equinox J2000.0 (ICRS)| [[History:Epoch|Epoch J2000.0 (ICRS)]] [[Astronomy:Equinox (celestial coordinates)|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] |
| Apparent magnitude (V) | {{{appmag_v2}}} |
| 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[2] mas/yr Dec.: −604.042[2] mas/yr |
| Parallax (π) | 54.9380 ± 0.0595[2] mas |
| 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 | |
| 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 astronomical unit|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]
| 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
- ↑ 1.0 1.1 1.2 1.3 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 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.
- ↑ 3.0 3.1 Cutri, R. M.; Skrutskie, M. F.; Van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T. et al. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". Vizier Online Data Catalog. Bibcode: 2003yCat.2246....0C.
- ↑ 4.0 4.1 Abt, Helmut A. (23 December 2008). "Mk Classifications of Spectroscopic Binaries". The Astrophysical Journal Supplement Series 180 (1): 117–118. doi:10.1088/0067-0049/180/1/117. ISSN 0067-0049. Bibcode: 2009ApJS..180..117A.
- ↑ 5.0 5.1 5.2 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. doi:10.1088/0004-637X/739/2/81. ISSN 0004-637X. Bibcode: 2011ApJ...739...81L.
- ↑ 6.0 6.1 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. doi:10.1086/110413. ISSN 0004-6256. Bibcode: 1967AJ.....72.1334C.
- ↑ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 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. doi:10.1051/0004-6361/201732209. ISSN 0004-6361. Bibcode: 2018A&A...614A..55A.
- ↑ 8.0 8.1 8.2 8.3 8.4 Šubjak, J. et al. (March 2023). "Search for planets around stars with wide brown dwarfs". Astronomy & Astrophysics 671: A10. doi:10.1051/0004-6361/202244238. Bibcode: 2023A&A...671A..10S.
- ↑ 9.0 9.1 9.2 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. ISSN 0004-6256. Bibcode: 2019AJ....158..138S.
- ↑ "HD 46588". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+46588.
- ↑ 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.
- ↑ 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. doi:10.1051/0004-6361/200913725. ISSN 0004-6361. Bibcode: 2010A&A...520A..79M.
- ↑ 13.0 13.1 Gáspár, András; Rieke, George H.; Ballering, Nicholas (29 July 2016). "The Correlation Between Metallicity and Debris Disk Mass". The Astrophysical Journal 826 (2): 171. doi:10.3847/0004-637X/826/2/171. Bibcode: 2016ApJ...826..171G.
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