WASP-48

Last updated
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]
Distance 1,507 ± 7  ly
(462 ± 2  pc)
Details
Mass 1.09±0.08 [5]   M☉
Radius 1.09±0.14 [5]   R☉
Luminosity 3.8 [6]   L☉
Surface gravity (log g)4.03±0.03 [7]   cgs
Temperature 6,000±150 [5]   K
Metallicity −0.12±0.12 [7]
Rotation 7.2±0.5 d [7]
Rotational velocity (v sin i)12.2±0.7 [5]  km/s
Age 7.9+2.0
−1.6 [7]   Gyr
Other designations
TOI-1628, TIC 284475976, WASP-48, TYC 3925-739-1, GSC 03925-00739, 2MASS J19243895+5528233 [8]
Database references
SIMBAD data
Exoplanet Archive data

WASP-48 is a G-type main-sequence star about 1,500 light-years away in the constellation Cygnus. The star is likely older than the 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 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]

Planetary system

In 2011 a transiting hot Jupiter planet, WASP-48b, was detected. [7]

The WASP-48 planetary system [5]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 0.98±0.09  MJ 0.03444±0.000432.143634±0.000003080.09+0.69
−0.55 ° 		1.67±0.08  RJ

References

  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. 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.
  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. 1 2 3 4 5 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. 1 2 3 4 5 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. ↑ "WASP-48". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2025-05-12.
  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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