WASP-49

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
WASP-49
Observation data
Epoch J2000      Equinox J2000
Constellation Lepus
Right ascension  06h 04m 21.47346s[1]
Declination −16° 57′ 55.1088″[1]
Apparent magnitude (V) 11.35[2]
Characteristics
Spectral type G6V[3]
Astrometry
Radial velocity (Rv)41.25[1] km/s
Proper motion (μ) RA: 54.769[1] mas/yr
Dec.: -19.061[1] mas/yr
Parallax (π)5.1113 ± 0.0314[1] mas
Distance638 ± 4 ly
(196 ± 1 pc)
Details
Mass0.94 ± 0.07 M
Radius0.90 ± 0.11 R
Other designations
WDS J06044-1658A, TYC 5936-2086-1, 2MASS J06042146-1657550[4]
Database references
SIMBADdata
WASP-49b
Discovery[5]
Discovered byMonika Lendl et al.
Discovery date2011
Primary Transit
Orbital characteristics
0.0379±0.011 AU
2.7817387 day
Inclination84.89±0.19 deg
Physical characteristics
Mean radius
1.115+0.047
−0.047
 RJ
Mass0.378+0.027
−0.027
 MJ

WASP-49 is a yellow dwarf main-sequence star. Its surface temperature is 5600 K. WASP-49 is depleted of heavy elements relative to Sun, with metallicity Fe/H index of -0.23, meaning it have abundance of iron 59% of the Sun's level.

Planetary system[edit]

In 2011, one planet, named WASP-49b was discovered. In 2017, it was found to have an extensive sodium envelope,[3] likely due to Io-like exomoon.[6]

References[edit]

  1. ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
  2. ^ Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
  3. ^ a b Wyttenbach, A.; Lovis, C.; Ehrenreich, D.; Bourrier, V.; Pino, L.; Allart, R.; Astudillo-Defru, N.; Cegla, H. M.; Heng, K.; Lavie, B.; Melo, C.; Murgas, F.; Santerne, A.; Ségransan, D.; Udry, S.; Pepe, F. (2017). "Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS)". Astronomy & Astrophysics. 602: A36. arXiv:1702.00448. doi:10.1051/0004-6361/201630063.
  4. ^ "WASP-49". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-08-29.
  5. ^ "European exoplanet catalog". Retrieved 2019-08-29.
  6. ^ Wyttenbach, A.; Lovis, C.; Ehrenreich, D.; Bourrier, V.; Pino, L.; Allart, R.; Astudillo-Defru, N.; Cegla, H. M.; Heng, K.; Lavie, B.; Melo, C.; Murgas, F.; Santerne, A.; Ségransan, D.; Udry, S.; Pepe, F. (2019). "Sodium and Potassium Signatures of Volcanic Satellites Orbiting Close-in Gas Giant Exoplanets". arXiv:1908.10732 [astro-ph.EP].

Coordinates: Sky map 6h 4m 21.462s, −16° 57′ 55.06″