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WASP-48

WASP-48
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus[1]
Right ascension 19h 24m 38.9614s[2]
Declination +55° 28′ 23.332″[2]
Apparent magnitude (V) 11.65±0.14[3]
Characteristics
Evolutionary stage main sequence[2]
Spectral type G0V[4]
Astrometry
Radial velocity (Rv)−19.47±0.65[2] km/s
Proper motion (μ) RA: +6.210[2] mas/yr
Dec.: −28.007[2] mas/yr
Parallax (π)2.1639±0.0104 mas[2]
Distance1,507 ± 7 ly
(462 ± 2 pc)
Details
Mass1.09±0.08[5] M☉
Radius1.09±0.14[5] R☉
Luminosity3.8[6] L☉
Surface gravity (log g)4.03±0.03[7] cgs
Temperature6,000±150[5] K
Metallicity−0.12±0.12[7]
Rotation7.2±0.5 d[7]
Rotational velocity (v sin i)12.2±0.7[5] km/s
Age7.9+2.0
−1.6[7] Gyr
Other designations
Gaia DR2 2141754578242371584, TYC 3925-739-1, GSC 03925-00739, 2MASS J19243895+5528233[8]
Database references
SIMBADdata

WASP-48 is a G-type main-sequence star about 1,500 light-years away. The star is likely older than Sun and slightly depleted in heavy elements. It shows an infrared excess noise of unknown origin,[9] yet has no detectable ultraviolet emissions associated with the starspot activity.[10] The discrepancy may be due to large interstellar absorption of light in interstellar medium for WASP-48.[11] The measurements are compounded by the emission from eclipsing contact binary NSVS-3071474 projected on sky plane nearby,[12] although no true stellar companions were detected by survey in 2015.[13]

The star is rotating rapidly, being spun up by the tides raised by the giant planet on close orbit.[14]

  1. ^ 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.
  2. ^ a b c d e f g 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.
  3. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355. Bibcode:2000A&A...355L..27H.
  4. ^ Zak, J.; Boffin, H. M. J.; Sedaghati, E.; Bocchieri, A.; Balkoova, Z.; Skarka, M.; Kabath, P. (2025). "Stellar obliquities of eight close-in gas giant exoplanets". Astronomy and Astrophysics. 694: A91. arXiv:2501.05615. Bibcode:2025A&A...694A..91Z. doi:10.1051/0004-6361/202452171.
  5. ^ a b c d Zak, J.; Boffin, H. M. J.; Sedaghati, E.; Bocchieri, A.; Balkoova, Z.; Skarka, M.; Kabath, P. (2025). "Stellar obliquities of eight close-in gas giant exoplanets". Astronomy and Astrophysics. 694: A91. arXiv:2501.05615. Bibcode:2025A&A...694A..91Z. doi:10.1051/0004-6361/202452171.
  6. ^ Loyd, R. O. Parke; Shkolnik, Evgenya L.; Schneider, Adam C.; Richey-Yowell, Tyler; Barman, Travis S.; Peacock, Sarah; Pagano, Isabella (2020). "Current Population Statistics do Not Favor Photoevaporation over Core-powered Mass Loss as the Dominant Cause of the Exoplanet Radius Gap". The Astrophysical Journal. 890 (1): 23. arXiv:1912.12305. Bibcode:2020ApJ...890...23L. doi:10.3847/1538-4357/ab6605.
  7. ^ a b c d Enoch, B.; Anderson, D. R.; Barros, S. C. C.; Brown, D. J. A.; Collier Cameron, A.; Faedi, F.; Gillon, M.; Hébrard, G.; Lister, T. A.; Queloz, D.; Santerne, A.; Smalley, B.; Street, R. A.; Triaud, A. H. M. J.; West, R. G.; Bouchy, F.; Bento, J.; Butters, O.; Fossati, L.; Haswell, C. A.; Hellier, C.; Holmes, S.; Jehen, E.; Lendl, M.; Maxted, P. F. L.; McCormac, J.; Miller, G. R. M.; Moulds, V.; Moutou, C.; et al. (2011). "WASP-35b, WASP-48b and WASP-51b: Two new planets and an independent discovery of HAT-P-30b". The Astronomical Journal. 142 (3): 86. arXiv:1104.2827. Bibcode:2011AJ....142...86E. doi:10.1088/0004-6256/142/3/86. S2CID 63996398.
  8. ^ Cite error: The named reference simbad was invoked but never defined (see the help page).
  9. ^ Sada, Pedro V.; Deming, Drake; Jennings, Donald E.; Jackson, Brian k.; Hamilton, Catrina M.; Fraine, Jonathan; Peterson, Steven W.; Haase, Flynn; Bays, Kevin; Lunsford, Allen; o'Gorman, Eamon (2012). "Extrasolar Planet Transits Observed at Kitt Peak National Observatory". Publications of the Astronomical Society of the Pacific. 124 (913): 212–229. arXiv:1202.2799. Bibcode:2012PASP..124..212S. doi:10.1086/665043. S2CID 29665395.
  10. ^ Shkolnik, Evgenya L. (2013). "An Ultraviolet Investigation of Activity on Exoplanet Host Stars". The Astrophysical Journal. 766 (1): 9. arXiv:1301.6192. Bibcode:2013ApJ...766....9S. doi:10.1088/0004-637X/766/1/9. S2CID 118415788.
  11. ^ Fossati, L.; Marcelja, S. E.; Staab, D.; Cubillos, P. E.; France, K.; Haswell, C. A.; Ingrassia, S.; Jenkins, J. S.; Koskinen, T.; Lanza, A. F.; Redfield, S.; Youngblood, A.; Pelzmann, G. (2017). "The effect of ISM absorption on stellar activity measurements and its relevance for exoplanet studies". Astronomy & Astrophysics. 601: A104. arXiv:1702.02883. Bibcode:2017A&A...601A.104F. doi:10.1051/0004-6361/201630339. S2CID 17549819.
  12. ^ Ciceri, S.; Mancini, L.; Southworth, J.; Bruni, I.; Nikolov, N.; d'Ago, G.; Schröder, T.; Bozza, V.; Tregloan-Reed, J.; Henning, Th. (2015). "Physical properties of the HAT-P-23 and WASP-48 planetary systems from multi-colour photometry". Astronomy & Astrophysics. 577: A54. arXiv:1503.00762. Bibcode:2015A&A...577A..54C. doi:10.1051/0004-6361/201425449. S2CID 53607610.
  13. ^ Wöllert, Maria; Brandner, Wolfgang; Bergfors, Carolina; Henning, Thomas (2015). "A Lucky Imaging search for stellar companions to transiting planet host stars". Astronomy & Astrophysics. 575: A23. arXiv:1507.01938. Bibcode:2015A&A...575A..23W. doi:10.1051/0004-6361/201424091. S2CID 119250579.
  14. ^ Brown, D. J. A. (2014). "Discrepancies between isochrone fitting and gyrochronology for exoplanet host stars?". Monthly Notices of the Royal Astronomical Society. 442 (2): 1844–1862. arXiv:1406.4402. Bibcode:2014MNRAS.442.1844B. doi:10.1093/mnras/stu950. S2CID 56052792.

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