astro.wikisort.org - Meteorite
HAT-P-4b is a confirmed extrasolar planet orbiting the star HAT-P-4 over 1000 light years away in Boötes constellation. It was discovered by transit on October 2, 2007, which looks for slight dimming of stars caused by planets that passed in front of them. It is the fourth planet discovered by the HATNet Project.[4] It is also called BD+36 2593b, TYC 2569-01599-1b, 2MASS J15195792+3613467b, SAO 64638b.
 Size comparison of HAT-P-4b with Jupiter. | |
| Discovery | |
|---|---|
| Discovered by | Kovacs et al. |
| Discovery site | Mass.,  USA |
| Discovery date | Oct 2, 2007 |
Detection method | transit |
| Orbital characteristics | |
Semi-major axis | 0.04449+0.00083 −0.0012 AU |
| Eccentricity | <0.0073[1] |
Orbital period (sidereal) | 3.0565254±0.0000012[2] d |
| Inclination | 89.9 +0.1 −2.2 |
| Semi-amplitude | 78.6+2.4 −2.3[1] |
| Star | HAT-P-4 |
| Physical characteristics | |
Mean radius | 1.28+0.016 −0.015 RJ[3] |
| Mass | 0.651+0.033 −0.037[1] MJ |
Mean density | 410 ± 60 kg/m3 (690 ± 100 lb/cu yd) |
Surface gravity | 10.5 m/s2 (34 ft/s2) |
It is a hot Jupiter with 68% the mass and 127% the radius of Jupiter, and 41% the density of water (31% of Jupiter). Since the inclination is known by transit observation, the true mass is known. The secondary eclipse where the planet passes behind the star was detected by the Spitzer Space Telescope leading to the discovery that the planet has inefficient heat transfer from its day to night side.[5]
The study in 2012, utilizing a Rossiter–McLaughlin effect, have determined the planetary orbit is probably aligned with the rotational axis of the star, misalignment equal to -4.9±11.9°.[6]
References
- Bonomo, A. S.; et al. (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 and Astrophysics. 602. A107. arXiv:1704.00373. Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882.
- Sada, Pedro V.; et al. (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. JSTOR 10.1086/665043.
- Wang, Xian-Yu; et al. (1 July 2021). "Transiting Exoplanet Monitoring Project (TEMP). VI. The Homogeneous Refinement of System Parameters for 39 Transiting Hot Jupiters with 127 New Light Curves". The Astrophysical Journal Supplement Series. 255 (1). 15. arXiv:2105.14851. Bibcode:2021ApJS..255...15W. doi:10.3847/1538-4365/ac0835.
- Kovács, G.; et al. (2007). "HAT-P-4b: A Metal-rich Low-Density Transiting Hot Jupiter". The Astrophysical Journal Letters. 670 (1): L41–L44. arXiv:0710.0602. Bibcode:2007ApJ...670L..41K. doi:10.1086/524058.
- Todorov, Kamen O.; et al. (2013). "Warm Spitzer Photometry of Three Hot Jupiters: HAT-P-3b, HAT-P-4b and HAT-P-12b". The Astrophysical Journal. 770 (2). 102. arXiv:1305.0833. Bibcode:2013ApJ...770..102T. doi:10.1088/0004-637X/770/2/102.
- Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments, 2012, arXiv:1206.6105
External links
Media related to HAT-P-4b at Wikimedia Commons
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На других языках
[de] HAT-P-4b
HAT-P-4b ist ein Exoplanet, der den gelben Zwerg HAT-P-4 alle 3,057 Tage umkreist und der im Jahr 2007 im Rahmen des HATNet Projects, also mittels der Transitmethode, entdeckt wurde. Der Exoplanet umkreist seinen Stern in einer Entfernung von ca. 0,0446 Astronomischen Einheiten und hat eine Masse von ca. 216,2 Erdmassen bzw. 0,68 Jupitermassen.- [en] HAT-P-4b
[es] HAT-P-4b
HAT-P-4b es un planeta extrasolar que orbita la estrella BD+36º2593 a más de 1000 años luz de distancia en la constelación de Bootes. Fue descubierto por medio de un tránsito astronómico el 21 de octubre de 2007. Es el cuarto planeta detectado por el Proyecto HATNet.[ru] HAT-P-4 b
HAT-P-4 b — экзопланета, вращающаяся вокруг одной из звёзд широкой двойной HAT-P-4. Находится на расстоянии более чем 1000 световых лет от Земли в созвездии Волопаса. Планета была открыта транзитным методом 2 октября 2007 года. Это была четвёртая планета, открытая в рамках Проекта HATNet.Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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