HAT-P-29

HAT-P-29 / Muspelheim
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus[1]
Right ascension 02h 12m 31.47875s[2]
Declination +51° 46′ 43.5637″[2]
Apparent magnitude (V) 11.83[3]
Characteristics
Evolutionary stage main-sequence[2][4]
Spectral type F8[4]
Astrometry
Radial velocity (Rv)−21.91±0.69[2] km/s
Proper motion (μ) RA: −9.972 mas/yr[2]
Dec.: +1.790 mas/yr[2]
Parallax (π)3.1358±0.0201 mas[2]
Distance1,040 ± 7 ly
(319 ± 2 pc)
Absolute magnitude (MV)+4.11[4]
Details[5]
Mass1.198+0.065
−0.063 M☉
Radius1.229+0.080
−0.073 R☉
Luminosity1.89+0.3
−0.25 L☉
Surface gravity (log g)4.337+0.045
−0.045 cgs
Temperature6,112±88 K
Metallicity [Fe/H]0.128+0.079
−0.080 dex
Age2.2±1.0[4] Gyr
Other designations
Muspelheim, TYC 3293-1539-1, GSC 03293-01539, 2MASS J02123147+5146435[6]
Database references
SIMBADdata
Exoplanet Archivedata

HAT-P-29, also known as Muspelheim since 2019 (as part of the IAU's NameExoWorlds project),[7] is a star about 1,040 light-years (320 parsecs) away. It is an F-type main-sequence star. The star's age of 2.2±1.0 billion years is less than half that of the Sun.[4] HAT-P-29 is slightly enriched in heavy elements, having 35% more iron than the Sun.

A very faint 19th-magnitude stellar companion was detected in 2016 at a projected separation of 3.290±0.002″,[8] but Gaia DR2 astrometry suggests that this is an unrelated background object.[9]

Planetary system

In 2011 a transiting hot Jupiter planet, HAT-P-29b, was detected on a mildly eccentric orbit.[4] The planet was named "Surt" by Denmark in 2019.[10] The planetary orbit is likely aligned with the equatorial plane of the star, with a misalignment equal to 26±16 degrees.[11]

The HAT-P-29 planetary system[5]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b (Surt) 0.767+0.046
−0.045 MJ 		0.0665±0.0012 5.723376±0.000021 0.073+0.029
−0.028 		88.06+0.78
−0.59° 		1.055+0.079
−0.072 RJ

References

  1. ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
  2. ^ a b c d e f 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. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862.
  4. ^ a b c d e f Buchhave, L. A.; Bakos, G. Á.; Hartman, J. D.; Torres, G.; Latham, D. W.; Andersen, J.; Kovács, G.; Noyes, R. W.; Shporer, A.; Esquerdo, G. A.; Fischer, D. A.; Johnson, J. A.; Marcy, G. W.; Howard, A. W.; Béky, B.; Sasselov, D. D.; Fűrész, G.; Quinn, S. N.; Stefanik, R. P.; Szklenár, T.; Berlind, P.; Calkins, M. L.; Lázár, J.; Papp, I.; Sári, P. (2011). "HAT-P-28b AND HAT-P-29b: Two Sub-Jupiter Mass Transiting Planets". The Astrophysical Journal. 733 (2): 116. arXiv:1103.1813. Bibcode:2011ApJ...733..116B. doi:10.1088/0004-637X/733/2/116. S2CID 119293967.
  5. ^ a b Wang, Songhu; Wang, Xian-Yu; Wang, Yong-Hao; Liu, Hui-Gen; Hinse, Tobias C.; Eastman, Jason; Bayliss, Daniel; Hori, Yasunori; Hu, Shao-Ming; Li, Kai; Liu, Jinzhong; Narita, Norio; Peng, Xiyan; Wittenmyer, R. A.; Wu, Zhen-Yu; Zhang, Hui; Zhang, Xiaojia; Zhao, Haibin; Zhou, Ji-Lin; Zhou, George; Zhou, Xu; Laughlin, Gregory (2018). "Transiting Exoplanet Monitoring Project (TEMP). I. Refined System Parameters and Transit Timing Variations of HAT-P-29b". The Astronomical Journal. 156 (4): 181. arXiv:1807.10107. Bibcode:2018AJ....156..181W. doi:10.3847/1538-3881/aadcfc. S2CID 119415237.
  6. ^ "HAT-P-29". SIMBAD. Centre de données astronomiques de Strasbourg.
  7. ^ IAU100 NameExoWorlds APPROVED NAMES
  8. ^ Ngo, Henry; Knutson, Heather A.; Hinkley, Sasha; Bryan, Marta; Crepp, Justin R.; Batygin, Konstantin; Crossfield, Ian; Hansen, Brad; Howard, Andrew W.; Johnson, John A.; Mawet, Dimitri; Morton, Timothy D.; Muirhead, Philip S.; Wang, Ji (2016). "Friends of Hot Jupiters. IV. Stellar Companions Beyond 50 au Might Facilitate Giant Planet Formation, but Most are Unlikely to Cause Kozai-Lidov Migration". The Astrophysical Journal. 827 (1): 8. arXiv:1606.07102. Bibcode:2016ApJ...827....8N. doi:10.3847/0004-637X/827/1/8. S2CID 41083068.
  9. ^ Mugrauer, M.; et al. (2019). "Search for stellar companions of exoplanet host stars by exploring the second ESA-Gaia data release". Monthly Notices of the Royal Astronomical Society. 490 (4): 5088. Bibcode:2019MNRAS.490.5088M. doi:10.1093/mnras/stz2673.
  10. ^ Denmark names new planet after Norse fire giant Surt
  11. ^ Mancini, L.; et al. (2022). "The GAPS Programme at TNG". Astronomy & Astrophysics. 664: A162. arXiv:2205.10549. doi:10.1051/0004-6361/202243742. S2CID 248986121.


This article is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.