Astronomy:BD+00 316

From HandWiki
(Redirected from Astronomy:WASP-71)
Short description: F-class main sequence star in the constellation Cetus
BD+00 316 / Mpingo
Observation data
Equinox J2000.0]] (ICRS)
Constellation Cetus
Right ascension  01h 57m 03.204s[1]
Declination 00° 45′ 31.88″[1]
Apparent magnitude (V) 10.56[2]
Characteristics
Spectral type F8[3]
B−V color index 0.896[2]
Astrometry
Radial velocity (Rv)7.690±0.004[4] km/s
Proper motion (μ) RA: 23.418[1] mas/yr
Dec.: −6.844[1] mas/yr
Parallax (π)2.8158 ± 0.0265[1] mas
Distance1,160 ± 10 ly
(355 ± 3 pc)
Details[5]
Mass1.53+0.07−0.06 M☉
Radius2.17+0.18−0.10 R☉
Surface gravity (log g)3.944+0.036−0.050 cgs
Temperature6,050±100 K
Metallicity [Fe/H]0.15±0.07 dex
Rotational velocity (v sin i)7.8±0.3 km/s
Age3.6+1.6−1.0 Gyr
Other designations
Mpingo, BD+00 316, Gaia DR2 2507901914613005056, TYC 30-116-1, 2MASS J01570320+0045318[6]
Database references
SIMBAD436 data

BD+00 316 is an ordinary star with a close-orbiting planetary companion in the equatorial constellation of Cetus. It is also known as WASP-71 since 2019;[3] BD+00 316 is the stellar identifier from the Bonner Durchmusterung catalogue. With an apparent visual magnitude of 10.56,[2] it is too faint to be visible to the naked eye. This star is located at a distance of 1,160 light-years based on parallax measurements, and is drifting further away with a heliocentric radial velocity of 7.7 km/s.[4]

This is classified as an F-type star with a stellar classification of F8.[3] It is more than double the diameter of the Sun with 1.5 times the Sun's mass. The star is younger than the Sun at about 3.6 billion years,[5] yet is already evolving away from the main sequence.[3] BD+00 316 is enriched in heavy elements, having 140% of the solar abundance of iron.[5] Imaging surveys in 2015 and 2020 failed to find any stellar companions for BD+00 316.[7][8]

The star was named Mpingo by Tanzanian amateur astronomers in 2020 as part of the NameExoWorlds contest, after the mpingo tree (Dalbergia melanoxylon) whose wood is a type of ebony used in musical instruments.[9]

Planetary system

In 2012 a transiting superjovian planet, designated component b, was detected on a tight, circular orbit.[3] The planetary orbit is well aligned with the equatorial plane of the star, the misalignment angle being equal to −1.9+7.1−7.5°.[5] Its equilibrium temperature is 2,016.1+67.0−52.5 K.[5]

The planet was named Tanzanite by Tanzanian amateur astronomers in 2020 as part of the NameExoWorlds contest, after the mineral also known as tanzanite.[9]

The WASP-71 planetary system[5]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b (Tanzanite) 2.14±0.08 MJ 0.0460±0.0006 2.903676±0.000008 <0.019[10] 85.8+2.4−2.1° 1.35+0.13−0.07 RJ

References

  1. ↑ 1.0 1.1 1.2 1.3 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.
  2. ↑ 2.0 2.1 2.2 Høg, E. et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27. doi:10.1888/0333750888/2862. ISBN 978-0333750889. Bibcode: 2000A&A...355L..27H. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 Smith, A. M. S.; Anderson, D. R.; Bouchy, F.; Collier Cameron, A.; Doyle, A. P.; Fumel, A.; Gillon, M.; Hébrard, G. et al. (2013), "WASP-71b: a bloated hot Jupiter in a 2.9-day, prograde orbit around an evolved F8 star", Astronomy & Astrophysics 552: A120, doi:10.1051/0004-6361/201220727, Bibcode: 2013A&A...552A.120S 
  4. ↑ 4.0 4.1 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  5. ↑ 5.0 5.1 5.2 5.3 5.4 5.5 Brown, D. J. A.; Triaud, A. H. M. J.; Doyle, A. P.; Gillon, M.; Lendl, M.; Anderson, D. R.; Collier Cameron, A.; Hébrard, G. et al. (2016), "Rossiter–McLaughlin models and their effect on estimates of stellar rotation, illustrated using six WASP systems", Monthly Notices of the Royal Astronomical Society 464: 810–839, doi:10.1093/mnras/stw2316 
  6. ↑ "BD+00 316". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=BD%2B00+316. 
  7. ↑ Wöllert, Maria; Brandner, Wolfgang (2015), "A Lucky Imaging search for stellar sources near 74 transit hosts", Astronomy & Astrophysics 579: A129, doi:10.1051/0004-6361/201526525, Bibcode: 2015A&A...579A.129W 
  8. ↑ Bohn, A. J.; Southworth, J.; Ginski, C.; Kenworthy, M. A.; Maxted, P. F. L.; Evans, D. F. (2020), "A multiplicity study of transiting exoplanet host stars. I. High-contrast imaging with VLT/SPHERE", Astronomy & Astrophysics 635: A73, doi:10.1051/0004-6361/201937127, Bibcode: 2020A&A...635A..73B 
  9. ↑ 9.0 9.1 The IAU announces names for WASP exoplanets
  10. ↑ Bonomo, A. S.; Desidera, S.; Benatti, S.; Borsa, F.; Crespi, S.; Damasso, M.; Lanza, A. F.; Sozzetti, A. et al. (2017), "The GAPS Programme with HARPS-N@TNG XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets", Astronomy & Astrophysics A107: 602, doi:10.1051/0004-6361/201629882, Bibcode: 2017A&A...602A.107B 

Coordinates: Sky map 01h 57m 03.2041s, +00° 45′ 31.8789″



Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:BD%2B00_316&oldid=3423783"