WASP-79
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Eridanus[1] |
| Right ascension | 04h 25m 29.01666s[2] |
| Declination | −30° 36′ 01.6107″[2] |
| Apparent magnitude (V) | 10.04[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | F5[4] |
| Astrometry | |
| Radial velocity (Rv) | +5.39±0.27[2] km/s |
| Proper motion (μ) | RA: −0.222 mas/yr[2] Dec.: +2.615 mas/yr[2] |
| Parallax (π) | 4.0708±0.0149 mas[2] |
| Distance | 801 ± 3 ly (245.7 ± 0.9 pc) |
| Details[5] | |
| Mass | 1.26±0.10 M☉ |
| Radius | 1.73±0.02 R☉ |
| Luminosity | 4.43±0.03 L☉ |
| Surface gravity (log g) | 4.06±0.03 cgs |
| Temperature | 6365±41 K |
| Metallicity [Fe/H] | +0.03±0.10[6] dex |
| Rotational velocity (v sin i) | 21.5±0.7[6] km/s |
| Age | 1.4±0.3[6] Gyr |
| Other designations | |
| Montuno, CD−30 1812, SAO 195000, TOI-413, TIC 170634116, WASP-79, TYC 7038-834-1[3] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
WASP-79, also named Montuno, is an F-type main-sequence star about 801 light-years (246 parsecs) away in the constellation Eridanus. With an apparent magnitude of 10, it is much too faint to be visible to the naked eye. With 1.26 M☉ and 1.73 R☉, it is both larger and more massive than the Sun. Its effective temperature is 6,365 K, making it hotter than the Sun.[5] It hosts one known exoplanet, WASP-79b.
Nomenclature
[edit]The designation WASP-79 comes from the Wide Angle Search for Planets; other designations include CD−30 1812 from the Durchmusterung catalog.
This was one of the systems selected to be named in the 2019 NameExoWorlds campaign during the 100th anniversary of the IAU, which assigned each country a star and planet to be named. This system was assigned to Panama. The approved names were Montuno for the star and Pollera for the planet, after the traditional costumes worn by a man and woman in the Panamanian folk dance El Punto.[7][8]
Planetary system
[edit]The planet WASP-79b, later named Pollera, is a large, low-density hot Jupiter, discovered in 2012 by the Wide Angle Search for Planets using the transit method.[4] It has a nearly polar orbit.[9][10] Observations by the Hubble Space Telescope[11] have been used to characterize its atmosphere,[12] detecting molecules such as water vapor[13] and measuring its temperature.[14]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination (°) |
Radius |
|---|---|---|---|---|---|---|
| b / Pollera | 0.835±0.077 MJ | 0.05014+0.00035 −0.00034 |
3.66239094(60) | <0.066[16] | 85.52±0.1 | 1.5795±0.0048 RJ |
References
[edit]- ↑ 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.
- 1 2 3 4 5 6 7 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.
- 1 2 "WASP-79". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 19 September 2026.
- 1 2 Smalley, B.; Anderson, D. R.; et al. (November 2012). "WASP-78b and WASP-79b: two highly-bloated hot Jupiter-mass exoplanets orbiting F-type stars in Eridanus". Astronomy & Astrophysics. 547: A61. arXiv:1206.1177. Bibcode:2012A&A...547A..61S. doi:10.1051/0004-6361/201219731. ISSN 0004-6361.
- 1 2 de Laverny, Patrick; Ligi, Roxanne; et al. (July 2025). "The Gaia spectroscopic catalogue of exoplanets and host stars". Astronomy & Astrophysics. 699: A100. arXiv:2505.22205. Bibcode:2025A&A...699A.100D. doi:10.1051/0004-6361/202554739. ISSN 0004-6361.
- 1 2 3 Brown, D. J. A.; Triaud, A. H. M. J.; et al. (January 2017). "Rossiter–McLaughlin models and their effect on estimates of stellar rotation, illustrated using six WASP systems". Monthly Notices of the Royal Astronomical Society. 464 (1): 810–839. arXiv:1610.00600. Bibcode:2017MNRAS.464..810B. doi:10.1093/mnras/stw2316. ISSN 0035-8711.
- ↑ "Approved names". NameExoWorlds. IAU. Retrieved 19 September 2026.
- ↑ "Panama". NameExoWorlds. IAU. Retrieved 19 September 2026.
- ↑ Addison, B. C.; Tinney, C. G.; et al. (August 2013). "A Nearly Polar Orbit for the Extrasolar Hot Jupiter WASP-79b". The Astrophysical Journal. 774 (1): L9. arXiv:1306.0878. Bibcode:2013ApJ...774L...9A. doi:10.1088/2041-8205/774/1/L9. ISSN 2041-8205.
- ↑ Johnson, Marshall C.; Cochran, William D.; et al. (October 2017). "Spin–Orbit Misalignments of Three Jovian Planets via Doppler Tomography". The Astronomical Journal. 154 (4): 137. arXiv:1708.01291. Bibcode:2017AJ....154..137J. doi:10.3847/1538-3881/aa8462. ISSN 0004-6256.
- ↑ Skaf, Nour; Bieger, Michelle Fabienne; et al. (September 2020). "ARES. II. Characterizing the Hot Jupiters WASP-127 b, WASP-79 b, and WASP-62b with the Hubble Space Telescope". The Astronomical Journal. 160 (3): 109. arXiv:2005.09615. Bibcode:2020AJ....160..109S. doi:10.3847/1538-3881/ab94a3. ISSN 0004-6256.
- ↑ Sotzen, Kristin S.; Stevenson, Kevin B.; et al. (January 2020). "Transmission Spectroscopy of WASP-79b from 0.6 to 5.0 μm". The Astronomical Journal. 159 (1): 5. arXiv:1911.02051. Bibcode:2020AJ....159....5S. doi:10.3847/1538-3881/ab5442. ISSN 0004-6256.
- ↑ Rathcke, Alexander D.; MacDonald, Ryan J.; et al. (October 2021). "HST PanCET Program: A Complete Near-UV to Infrared Transmission Spectrum for the Hot Jupiter WASP-79b". The Astronomical Journal. 162 (4): 138. arXiv:2104.10688. Bibcode:2021AJ....162..138R. doi:10.3847/1538-3881/ac0e99. ISSN 0004-6256.
- ↑ Foote, Trevor O.; Lewis, Nikole K.; et al. (January 2022). "The Emission Spectrum of the Hot Jupiter WASP-79b from HST/WFC3". The Astronomical Journal. 163 (1): 7. arXiv:2107.14334. Bibcode:2022AJ....163....7F. doi:10.3847/1538-3881/ac2f4a. ISSN 0004-6256.
- ↑ Saha, Suman (September 2024). "Precise Transit Photometry Using TESS. II. Revisiting 28 Additional Transiting Systems with Updated Physical Properties". The Astrophysical Journal Supplement Series. 274 (1): 13. arXiv:2407.20846. Bibcode:2024ApJS..274...13S. doi:10.3847/1538-4365/ad6a60. ISSN 0067-0049.
- ↑ Bonomo, A. S.; Desidera, S.; et al. (June 2017). "The GAPS Programme with HARPS-N at TNG: XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy & Astrophysics. 602: A107. arXiv:1704.00373. Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882. ISSN 0004-6361.
Further reading
[edit]- Gressier, A.; Lecavelier des Etangs, A.; et al. (April 2023). "The Hubble PanCET program: The near-ultraviolet transmission spectrum of WASP-79b". Astronomy & Astrophysics. 672: A34. arXiv:2302.08962. Bibcode:2023A&A...672A..34G. doi:10.1051/0004-6361/202244429. ISSN 0004-6361.
