WASP-48

	WASP-48
Observationsdata; Epok: J2000
Stjärnbild	Svanen
Rektascension	19t 24m 38,9614s
Deklination	+55° 28′ 23,332″
Skenbar magnitud ()	11,65 ± 0,14
Stjärntyp
Spektraltyp	G0 V
Variabeltyp	Planetpassage-variabel
Astrometri
Radialhastighet ()	-19,47 ± 0,65 km/s
Egenrörelse (µ)	RA: +6,210 mas/år; Dek.: -28,007 mas/år
Parallax ()	2,1639 ± 0,0104
Avstånd	1 507 ± 7 lå (462 ± 2 pc)
Absolut magnitud ()	-
Detaljer
Massa	1,09 ± 0,08 M☉
Radie	1,09 ± 0,14 R☉
Luminositet	3,8 L☉
Temperatur	6 000 ± 150 K
Metallicitet	+-0,012 ± 0,12 dex
Vinkelhastighet	12,2 ± 0,7 km/s
Ålder	7,9 +2,0−1,6 miljarder år
Andra beteckningar
	TOI-1628, TIC 284475976, TYC 3925-739-1, GSC 03925-00739, 2MASS J19243895+5528233, UCAC3 291-131713, WASP-48, Gaia DR1 2141754573944019328, Gaia DR3 2141754578242371584, Gaia DR2 2141754578242371584

WASP-48 är en huvudseriestjärna av spektraltyp G, belägen i stjärnbilden Svanen på ett avstånd av ca 1 500 ljusår från solsystemet. Stjärnan är sannolikt äldre än solen och något utarmad på tunga element. Den visar ett brus av infrarött överskott av okänt ursprung, men har inga noterbara ultravioletta emissioner i samband med stjärnfläcksaktivitet. Skillnaden kan bero på stor interstellär absorption av ljus i interstellärt medium för WASP-48. Mätningarna försvåras av emissionen från den förmörkande kontaktbinära stjärnan NSVS-3071474 projicerad på ett närliggande himlaplan, även om inga riktiga följeslagare upptäcktes vid kartläggning 2015.

Stjärnan roterar snabbt och snurras upp av tidvattenkrafter orsakad av en jätteplanet i snäv omloppsbana.

Planetsystem

År 2011 upptäcktes en transiterande het exoplanet av jupiterstorlek, WASP-48b.

WASP-48 solsystem
Planet	Massa	Halv storaxel (AE)	Siderisk omloppstid (d)	Excentricitet	Inklination	Radie
b	0,98 ± 0,09 M_J	0,03444 ± 0,00043	2,143634 ± 0,000003	0	80,09 ^+0,69_−0,55	1,67 ± 0,08 M_J

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, WASP-48, 11 september 2026.

Noter

↑ 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 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.; 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.
1 2 3 4 5 6 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.
↑ 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.
1 2 3 4 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.
↑ https://simbad.cds.unistra.fr/simbad/sim-id?Ident=WASP-48. Hämtad 2020-09-20.
↑ "WASP-48". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 2025-05-12.
↑ 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.
↑ 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.
↑ 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.
↑ 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.
↑ 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.
↑ 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.

[A-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.

[B-2] 1 2 3 4 5 6 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.

[C-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.

[D-4] 1 2 3 4 5 6 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.

[E-5] 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.

[F-6] 1 2 3 4 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.

[SIMBAD-7] ttps://simbad.cds.unistra.fr/simbad/sim-id?Ident=WASP-48. Hämtad 2020-09-20.

[G-8] "WASP-48". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 2025-05-12.

[H-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.

[I-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.

[J-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.

[K-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.

[L-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.

[M-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.