HD 37124
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Taurus |
| Right ascension | 05h 37m 02.49s [1] |
| Declination | +20° 43′ 50.8″ [1] |
| Apparent magnitude (V) | 7.68 |
| Characteristics | |
| Spectral type | G4V |
| B−V color index | 0.66 |
| Astrometry | |
| Proper motion (μ) | RA: -80.14 ± 1.05 [1] mas/yr Dec.: -419.77 ± 0.65 [1] mas/yr |
| Parallax (π) | 29.70 ± 0.70[1] mas |
| Distance | 110 ± 3 ly (33.7 ± 0.8 pc) |
| Details | |
| Mass | 0.91 M☉ |
| Radius | 0.82 R☉ |
| Temperature | 5610 ± 70 K |
| Metallicity | -0.32 Fe/H |
| Age | 3.33 billion years |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 37124 is a yellow dwarf star approximately 110 light-years away in the constellation of Taurus (the Bull). As of 2005, three extrasolar planets have been confirmed to orbit the star. This system is currently one of the only that contains multiple planet that are not hot Jupiters and are either near or within the habitable zone. The name of this star comes from its identifier in the Henry Draper Catalog.
Contents |
[edit] Planetary system
As of 2005, three extrasolar planets have been confirmed to orbit the star. This system is currently one of the only that contains multiple planet that are not hot Jupiters and are either near or within the habitable zone. Announced in 1999, the first planet (HD 37124 b)[2] was discovered orbiting its parent star around the inner edge of its star's habitable zone, causing the planet to have a somewhat similar insolation to that of Venus. The second planet (HD 37124 c) was discovered in 2002.[3] This planet also orbits within its star's habitable zone, but with an insolation similar to that of Mars. The third and currently final planet discovered (HD 37124 d) was announced in 2005.[4] Though not orbiting exactly in the habitable zone, this planet is thought to have an insolation similar to that of Jupiter. Because all planets are classified as Jovian planets, the two inner planets would be very alien in appearance, while the third planet is considered a Jupiter twin.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| b | >0.61 MJ | 0.53 | 154.46 | 0.055 |
| c | >0.6 MJ | 1.64 | 843.6 | 0.14 |
| d | >0.66 MJ | 3.19 | 2,295 | 0.2 (fixed) |
[edit] See also
[edit] References
- ^ a b c d e van Leeuwen, F. (2007). "HIP 26381". Hipparcos, the New Reduction. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=26314. Retrieved 2010-02-28.
- ^ Vogt et al.; Marcy, Geoffrey W.; Butler, R. Paul; Apps, Kevin (2000). "Six New Planets from the Keck Precision Velocity Survey". The Astrophysical Journal 536 (2): 902–914. arXiv:astro-ph/9911506. Bibcode 2000ApJ...536..902V. doi:10.1086/308981. http://www.iop.org/EJ/article/0004-637X/536/2/902/50799.html.
- ^ Butler, R. Paul et al (2003). "Seven New Keck Planets Orbiting G and K Dwarfs". The Astrophysical Journal 582 (1): 455–466. Bibcode 2003ApJ...582..455B. doi:10.1086/344570. http://www.iop.org/EJ/article/0004-637X/582/1/455/56131.html.
- ^ a b Vogt, Steven S. et al (2005). "Five New Multicomponent Planetary Systems". The Astrophysical Journal 632 (1): 638–658. Bibcode 2005ApJ...632..638V. doi:10.1086/432901. http://iopscience.iop.org/0004-637X/632/1/638/fulltext/.
[edit] External links
- "A dynamical analysis of the HD 37124 planetary system" (in French). CAT.INIST. http://cat.inist.fr/?aModele=afficheN&cpsidt=14462421. Retrieved 2008-06-22.
- "HD 37124". Extrasolar Visions. http://www.extrasolar.net/startour.asp?StarCatId=normal&StarId=74. Retrieved 2008-06-22.
- "HD 37124 System". The Final Theory. Archived from the original on 2008-03-09. http://web.archive.org/web/20080309203629/http://www.wingmakers.co.nz/HD+37124+PLanetary+System.html. Retrieved 2008-06-22.
- Jianghui Ji et al. (2003-05-23). "The Librating Companions in HD 37124, HD 12661, HD 82943, 47 Uma and GJ 876: Alignment or Antialignment?". The Astrophysical Journal 591: L57–L60. arXiv:astro-ph/0305448. Bibcode 2003ApJ...591L..57J. doi:10.1086/377038.
- "Notes for star HD 37124". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/star.php?st=HD+37124. Retrieved 2008-06-22.
- Extrasolar Planet Interactions by Rory Barnes & Richard Greenberg, Lunar and Planetary Lab, University of Arizona
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