Astronomy:HD 142245

From HandWiki
Short description: Triple star system in the constellation Serpens
HD 142245
Observation data
Equinox J2000.0]] (ICRS)
Constellation Serpens[1]
Right ascension  15h 52m 56.28008s[2]
Declination +15° 25′ 50.5379″[2]
Apparent magnitude (V) 7.45[3]
Characteristics
Evolutionary stage subgiant[4]
Spectral type K0IV+M1[5]
Astrometry
Radial velocity (Rv)6.92 km/s
Proper motion (μ) RA: −57.312[2] mas/yr
Dec.: −21.641[2] mas/yr
Parallax (π)10.2374 ± 0.0224[2] mas
Distance318.6 ± 0.7 ly
(97.7 ± 0.2 pc)
Absolute magnitude (MV)+2.27[1]
Orbit
PrimaryHD 142245 A
CompanionHD 142245 BC
Semi-major axis (a)2.5"
(237 AU[6])
Details[7]
HD 142245 A
Mass1.52±0.05[5] M☉
Radius4.8±0.1[8] R☉
Luminosity11.4[8] L☉
Surface gravity (log g)3.21±0.14 cgs
Temperature4,838±36[9] K
Metallicity0.20±0.02[9]
Age2.855±0.514 Gyr
HD 142245 BC
Mass0.56[6] M☉
Other designations
BD+15 2925, Gaia DR2 1193193836691820032, HD 142245, HIP 77783, TYC 1496-1841-1, 2MASS J15525629+1525507[10]
Database references
SIMBADdata

HD 142245 is a hierarchical triple star system about 318 light-years away.

The primary subgiant star HD 142245 A belongs to the spectral class of K0. Its age is much younger than Sun`s at 2.855±0.514 billion years.[9] The primary star is slightly enriched by heavy elements, having 160% of solar abundance.[9]

In 2014, the co-moving binary stellar companion HD 142245 BC was detected. It consists of pair of red dwarf stars with composite spectral class M1, orbiting each other on 4 AU orbit.[6]

No other stellar companions were found at projected separations from 5.48 to 153.34 AU around HD 142245 A.[5]

Planetary system

In 2011 one superjovian planet HD 142245 A b on a mildly eccentric orbit around star HD 142245 A was discovered utilizing the radial velocity method.[11]

The HD 142245 planetary system[12]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
HD 142245 A b ≥1.9±0.2 MJ 2.77±0.09 1299±48 0.32 — —

References

  1. ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 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. ↑ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355. Bibcode: 2000A&A...355L..27H. 
  4. ↑ Bonsor, Amy; Kennedy, Grant M.; Wyatt, Mark C.; Johnson, John A.; Sibthorpe, Bruce (2014). "Herschel observations of debris discs orbiting planet-hosting subgiants". Monthly Notices of the Royal Astronomical Society 437 (4): 3288. doi:10.1093/mnras/stt2128. Bibcode: 2014MNRAS.437.3288B. 
  5. ↑ 5.0 5.1 5.2 Wittrock, Justin M.; Kane, Stephen R.; Horch, Elliott P.; Howell, Steve B.; Ciardi, David R.; Everett, Mark E. (2017). "Exclusion of Stellar Companions to Exoplanet Host Stars". The Astronomical Journal 154 (5): 184. doi:10.3847/1538-3881/aa8d69. Bibcode: 2017AJ....154..184W. 
  6. ↑ 6.0 6.1 6.2 M. Mugrauer, C. Ginski, "High-contrast imaging search for stellar and substellar companions of exoplanet host stars", 2014
  7. ↑ Sousa, S. G.; Adibekyan, V.; Delgado-Mena, E.; Santos, N. C.; Andreasen, D. T.; Ferreira, A. C. S.; Tsantaki, M.; Barros, S. C. C. et al. (2018). "SWEET-Cat updated New homogenous spectroscopic parameters". Astronomy & Astrophysics A58: 620. doi:10.1051/0004-6361/201833350. Bibcode: 2018A&A...620A..58S. 
  8. ↑ 8.0 8.1 Bonfanti, A.; Ortolani, S.; Piotto, G.; Nascimbeni, V. (2015). "Revising the ages of planet-hosting stars". Astronomy & Astrophysics 575: A18. doi:10.1051/0004-6361/201424951. Bibcode: 2015A&A...575A..18B. 
  9. ↑ 9.0 9.1 9.2 9.3 Ghezzi, Luan; Montet, Benjamin T.; Johnson, John Asher (2018). "Retired a Stars Revisited: An Updated Giant Planet Occurrence Rate as a Function of Stellar Metallicity and Mass". The Astrophysical Journal 860 (2): 109. doi:10.3847/1538-4357/aac37c. Bibcode: 2018ApJ...860..109G. 
  10. ↑ "HD 142245". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+142245. 
  11. ↑ John Asher Johnson; Clanton, Christian; Howard, Andrew W.; Bowler, Brendan P.; Henry, Gregory W.; Marcy, Geoffrey W.; Crepp, Justin R.; Endl, Michael et al. (2011). "Retired a Stars and Their Companions. Vii. 18 New Jovian Planets". The Astrophysical Journal Supplement Series 197 (2): 26. doi:10.1088/0067-0049/197/2/26. Bibcode: 2011ApJS..197...26J. 
  12. ↑ Planet HD 142245 A b on exoplanet.eu

Coordinates: Sky map 15h 52m 56.2803s, +15° 25′ 50.5399″



Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:HD_142245&oldid=3942980"