| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lepus |
| Right ascension | 06h 04m 21.47357s [1] |
| Declination | −16° 57′ 55.1087″ [1] |
| Apparent magnitude (V) | 11.35 [2] |
| Characteristics | |
| Spectral type | G6V [3] |
| Astrometry | |
| Radial velocity (Rv) | 41.81±0.38 [1] km/s |
| Proper motion (μ) |
RA: 54.671
mas/
yr
[1] Dec.: -19.055 mas/ yr [1] |
| Parallax (π) | 5.1315 ± 0.0158 mas [1] |
| Distance | 636 ± 2
ly (194.9 ± 0.6 pc) |
| Details | |
| A | |
| Mass | 1.003±0.10 [3] M☉ |
| Radius | 1.038±0.038 [3] R☉ |
| Luminosity | 0.884 [4] L☉ |
| Surface gravity (log g) | 4.5±0.1 [3] cgs |
| Temperature | 5,600±150 [5] K |
| Metallicity [Fe/H] | −0.230±0.070 [5] dex |
| Rotational velocity (v sin i) | 0.90±0.30 [5] km/s |
| Age | 11.9+0.8 −3.2 [5] Gyr |
| B | |
| Mass | 0.337+0.009 −0.024 [6] M☉ |
| Temperature | 3454+10 −25 [6] K |
| Other designations | |
| Database references | |
| SIMBAD | A |
| B | |
WASP-49 is a binary star system about 636 light-years (195 parsecs) away in the constellation Lepus. The two stars are separated by 443 AU. [6] The primary is a G-type main-sequence star, with a surface temperature of 5,600 K (5,330 °C; 9,620 °F). WASP-49 is depleted of heavy elements relative to the Sun. It has a metallicity Fe/H index of –0.23, meaning it has 59% the iron level of the Sun. [5]
Planetary system
In 2012, one exoplanet, designated WASP-49b, was discovered around the primary star by a team led by Monika Lendl. [8] This is a hot Jupiter with an equilibrium temperature of 1369±39 K. [8]
In 2017, WASP-49b was found to have an extensive sodium envelope. [3] A study in 2019 using data from the Hubble Space Telescope in near-UV found clear absorption features caused by metals, including magnesium and iron. The magnesium and iron gas is not gravitationally bound to the planet, but could be magnetically confined to it. [9] [10] The sodium envelope around WASP-49b could be due to an Io-like exomoon. [11] [12] This idea, however, is speculative. [13]
| Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.399+0.029 −0.027 MJ |
0.0379+0.0010 −0.0011 |
2.7817387(56) | <0.026 | 84.89±0.19 ° | 1.115±0.047 RJ |
References
- ^ a b c d e 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.
- ^ 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.
- ^ a b c d e 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. Bibcode: 2017A&A...602A..36W. doi: 10.1051/0004-6361/201630063. S2CID 55988055.
- ^ 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. Gaia DR2 record for this source at VizieR.
- ^ a b c d e f Bonomo, A. S.; et al. (2017), "The GAPS Programme with HARPS-N at TNG", Astronomy & Astrophysics, 602: A107, arXiv: 1704.00373, Bibcode: 2017A&A...602A.107B, doi: 10.1051/0004-6361/201629882, S2CID 118923163
- ^ a b c Mugrauer, M. (December 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): 5088–5102. Bibcode: 2019MNRAS.490.5088M. doi: 10.1093/mnras/stz2673.
- ^ "WASP-49". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-08-29.
- ^ a b Lendl, M.; Anderson, D. R.; Collier-Cameron, A.; Doyle, A. P.; Gillon, M.; Hellier, C.; Jehin, E.; Lister, T. A.; Maxted, P. F. L.; Pepe, F.; Pollacco, D.; Queloz, D.; Smalley, B.; Ségransan, D.; Smith, A. M. S.; Triaud, A. H. M. J.; Udry, S.; West, R. G.; Wheatley, P. J. (2012), "WASP-42 b and WASP-49 b: Two new transiting sub-Jupiters", Astronomy & Astrophysics, 544: A72, arXiv: 1205.2757, Bibcode: 2012A&A...544A..72L, doi: 10.1051/0004-6361/201219585, S2CID 54186638
- ^ Sing, David K.; Lavvas, Panayotis; Ballester, Gilda E.; Etangs, Alain Lecavelier des; Marley, Mark S.; Nikolov, Nikolay; Ben-Jaffel, Lotfi; Bourrier, Vincent; Buchhave, Lars A.; Deming, Drake L.; Ehrenreich, David; et al. (2019-08-01). "The HST PanCET Program: Exospheric Mg II and Fe II in the Near-UV transmission spectrum of WASP-121b using Jitter Decorrelation". The Astronomical Journal. 158 (2): 91. arXiv: 1908.00619. doi: 10.3847/1538-3881/ab2986. hdl: 10150/634666. ISSN 1538-3881. S2CID 199405274.
- ^ "Hubble Uncovers a 'Heavy Metal' Exoplanet Shaped Like a Football". HubbleSite.org. Retrieved 2020-01-01.
- ^ Oza, Apurva V.; Johnson, Robert E.; Lellouch, Emmanuel; Schmidt, Carl; Schneider, Nick; Huang, Chenliang; Gamborino, Diana; Gebek, Andrea; Wyttenbach, Aurelien; Demory, Brice-Olivier; Mordasini, Christoph; Saxena, Prabal; Dubois, David; Moullet, Arielle; Thomas, Nicolas (2019-08-28). "Sodium and Potassium Signatures of Volcanic Satellites Orbiting Close-in Gas Giant Exoplanets". The Astrophysical Journal. 885 (2): 168. arXiv: 1908.10732. Bibcode: 2019ApJ...885..168O. doi: 10.3847/1538-4357/ab40cc. S2CID 201651224.
- ^ "Hints of a volcanically active exomoon". Portal. 2019-08-29. Retrieved 2020-01-01.
- ^ waspplanets (2019-09-02). "Hints of volcanic exo-moons?". WASP Planets. Retrieved 2020-01-01.
 | This main-sequence-star-related article is a stub. You can help Wikipedia by expanding it. |
 | This extrasolar-planet-related article is a stub. You can help Wikipedia by expanding it. |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lepus |
| Right ascension | 06h 04m 21.47357s [1] |
| Declination | −16° 57′ 55.1087″ [1] |
| Apparent magnitude (V) | 11.35 [2] |
| Characteristics | |
| Spectral type | G6V [3] |
| Astrometry | |
| Radial velocity (Rv) | 41.81±0.38 [1] km/s |
| Proper motion (μ) |
RA: 54.671
mas/
yr
[1] Dec.: -19.055 mas/ yr [1] |
| Parallax (π) | 5.1315 ± 0.0158 mas [1] |
| Distance | 636 ± 2
ly (194.9 ± 0.6 pc) |
| Details | |
| A | |
| Mass | 1.003±0.10 [3] M☉ |
| Radius | 1.038±0.038 [3] R☉ |
| Luminosity | 0.884 [4] L☉ |
| Surface gravity (log g) | 4.5±0.1 [3] cgs |
| Temperature | 5,600±150 [5] K |
| Metallicity [Fe/H] | −0.230±0.070 [5] dex |
| Rotational velocity (v sin i) | 0.90±0.30 [5] km/s |
| Age | 11.9+0.8 −3.2 [5] Gyr |
| B | |
| Mass | 0.337+0.009 −0.024 [6] M☉ |
| Temperature | 3454+10 −25 [6] K |
| Other designations | |
| Database references | |
| SIMBAD | A |
| B | |
WASP-49 is a binary star system about 636 light-years (195 parsecs) away in the constellation Lepus. The two stars are separated by 443 AU. [6] The primary is a G-type main-sequence star, with a surface temperature of 5,600 K (5,330 °C; 9,620 °F). WASP-49 is depleted of heavy elements relative to the Sun. It has a metallicity Fe/H index of –0.23, meaning it has 59% the iron level of the Sun. [5]
Planetary system
In 2012, one exoplanet, designated WASP-49b, was discovered around the primary star by a team led by Monika Lendl. [8] This is a hot Jupiter with an equilibrium temperature of 1369±39 K. [8]
In 2017, WASP-49b was found to have an extensive sodium envelope. [3] A study in 2019 using data from the Hubble Space Telescope in near-UV found clear absorption features caused by metals, including magnesium and iron. The magnesium and iron gas is not gravitationally bound to the planet, but could be magnetically confined to it. [9] [10] The sodium envelope around WASP-49b could be due to an Io-like exomoon. [11] [12] This idea, however, is speculative. [13]
| Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.399+0.029 −0.027 MJ |
0.0379+0.0010 −0.0011 |
2.7817387(56) | <0.026 | 84.89±0.19 ° | 1.115±0.047 RJ |
References
- ^ a b c d e 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.
- ^ 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.
- ^ a b c d e 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. Bibcode: 2017A&A...602A..36W. doi: 10.1051/0004-6361/201630063. S2CID 55988055.
- ^ 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. Gaia DR2 record for this source at VizieR.
- ^ a b c d e f Bonomo, A. S.; et al. (2017), "The GAPS Programme with HARPS-N at TNG", Astronomy & Astrophysics, 602: A107, arXiv: 1704.00373, Bibcode: 2017A&A...602A.107B, doi: 10.1051/0004-6361/201629882, S2CID 118923163
- ^ a b c Mugrauer, M. (December 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): 5088–5102. Bibcode: 2019MNRAS.490.5088M. doi: 10.1093/mnras/stz2673.
- ^ "WASP-49". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-08-29.
- ^ a b Lendl, M.; Anderson, D. R.; Collier-Cameron, A.; Doyle, A. P.; Gillon, M.; Hellier, C.; Jehin, E.; Lister, T. A.; Maxted, P. F. L.; Pepe, F.; Pollacco, D.; Queloz, D.; Smalley, B.; Ségransan, D.; Smith, A. M. S.; Triaud, A. H. M. J.; Udry, S.; West, R. G.; Wheatley, P. J. (2012), "WASP-42 b and WASP-49 b: Two new transiting sub-Jupiters", Astronomy & Astrophysics, 544: A72, arXiv: 1205.2757, Bibcode: 2012A&A...544A..72L, doi: 10.1051/0004-6361/201219585, S2CID 54186638
- ^ Sing, David K.; Lavvas, Panayotis; Ballester, Gilda E.; Etangs, Alain Lecavelier des; Marley, Mark S.; Nikolov, Nikolay; Ben-Jaffel, Lotfi; Bourrier, Vincent; Buchhave, Lars A.; Deming, Drake L.; Ehrenreich, David; et al. (2019-08-01). "The HST PanCET Program: Exospheric Mg II and Fe II in the Near-UV transmission spectrum of WASP-121b using Jitter Decorrelation". The Astronomical Journal. 158 (2): 91. arXiv: 1908.00619. doi: 10.3847/1538-3881/ab2986. hdl: 10150/634666. ISSN 1538-3881. S2CID 199405274.
- ^ "Hubble Uncovers a 'Heavy Metal' Exoplanet Shaped Like a Football". HubbleSite.org. Retrieved 2020-01-01.
- ^ Oza, Apurva V.; Johnson, Robert E.; Lellouch, Emmanuel; Schmidt, Carl; Schneider, Nick; Huang, Chenliang; Gamborino, Diana; Gebek, Andrea; Wyttenbach, Aurelien; Demory, Brice-Olivier; Mordasini, Christoph; Saxena, Prabal; Dubois, David; Moullet, Arielle; Thomas, Nicolas (2019-08-28). "Sodium and Potassium Signatures of Volcanic Satellites Orbiting Close-in Gas Giant Exoplanets". The Astrophysical Journal. 885 (2): 168. arXiv: 1908.10732. Bibcode: 2019ApJ...885..168O. doi: 10.3847/1538-4357/ab40cc. S2CID 201651224.
- ^ "Hints of a volcanically active exomoon". Portal. 2019-08-29. Retrieved 2020-01-01.
- ^ waspplanets (2019-09-02). "Hints of volcanic exo-moons?". WASP Planets. Retrieved 2020-01-01.
|
| This main-sequence-star-related article is a stub. You can help Wikipedia by expanding it. |
|
| This extrasolar-planet-related article is a stub. You can help Wikipedia by expanding it. |