| 词条 | HAT-P-4b |
| 释义 |
| name = HAT-P-4b | image = Exoplanet Comparison HAT-P-4 b.png | caption = Size comparison of HAT-P-4b with Jupiter. | discoverer = Kovacs et al. | discovery_site = Mass., {{flag|USA}} | discovered = Oct 2, 2007 | discovery_method = transit | apsis = astron | semimajor = {{val|0.04449|0.00083|0.0012}} AU | eccentricity = {{val|0.0073|p=<}} | period = {{val|3.0565254|0.0000012}}[2] d | inclination = 89.9 {{±|0.1|2.2}} | semi-amplitude = {{val|78.6|2.4|2.3}} | star = HAT-P-4 | mean_radius = 1.27 ± 0.05 {{Jupiter radius|link=y}} | mass = {{val|0.651|0.033|0.037}} {{Jupiter mass|link=y}} | density = {{convert|410|±|60|kg/m3|lk=on|abbr=on}} | surface_grav = {{convert|10.5|m/s2|lk=on|abbr=on}} }} 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.[5] It is also called BD+36 2593b, TYC 2569-01599-1b, 2MASS J15195792+3613467b, SAO 64638b. 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.[6] References1. ^1 {{cite journal | title=HAT-P-4b: A Metal-rich Low-Density Transiting Hot Jupiter | url=http://iopscience.iop.org/1538-4357/670/1/L41/fulltext/ | last1=Kovács | first1=G. | last2=Bakos | first2=G. Á. | last3=Torres | first3=G. | last4=Sozzetti | first4=A. | last5=Latham | first5=D. W. | last6=Noyes | first6=R. W. | last7=Butler | first7=R. P. | last8=Marcy | first8=G. W. | last9=Fischer | first9=D. A. | display-authors=1 | journal=The Astrophysical Journal Letters | volume=670 | issue=1 | pages=L41–L44 | year=2007 | arxiv=0710.0602 | bibcode=2007ApJ...670L..41K | doi=10.1086/524058 }} [1][2][3]2. ^1 {{cite journal | title=Extrasolar Planet Transits Observed at Kitt Peak National Observatory | jstor=10.1086/665043 | last1=Sada | first1=Pedro V. | last2=Deming | first2=Drake | last3=Jennings | first3=Donald E. | last4=Jackson | first4=Brian K. | last5=Hamilton | first5=Catrina M. | last6=Fraine | first6=Jonathan | last7=Peterson | first7=Steven W. | last8=Haase | first8=Flynn | last9=Bays | first9=Kevin | last10=Lunsford | first10=Allen | last11=O'Gorman | first11=Eamon | display-authors=1 | journal=Publications of the Astronomical Society of the Pacific | volume=124 | issue=913 | pages=212–229 | date=2012 | arxiv=1202.2799 | bibcode=2012PASP..124..212S | doi=10.1086/665043 }} 3. ^1 {{cite journal | title=Warm Spitzer Photometry of Three Hot Jupiters: HAT-P-3b, HAT-P-4b and HAT-P-12b | last1=Todorov | first1=Kamen O. | last2=Deming | first2=Drake | last3=Knutson | first3=Heather A. | last4=Burrows | first4=Adam | last5=Fortney | first5=Jonathan J. | last6=Lewis | first6=Nikole K. | last7=Cowan | first7=Nicolas B. | last8=Agol | first8=Eric | last9=Desert | first9=Jean-Michel | last10=Sada | first10=Pedro V. | last11=Charbonneau | first11=David | last12=Laughlin | first12=Gregory | last13=Langton | first13=Jonathan | last14=Showman | first14=Adam P. | display-authors=1 | journal=The Astrophysical Journal | volume=770 | issue=2 | at=102 | date=2013 | arxiv=1305.0833 | bibcode=2013ApJ...770..102T | doi=10.1088/0004-637X/770/2/102 }} }} External links{{commonscat-inline|HAT-P-4 b|HAT-P-4b}}{{Sky|15|19|58|+|36|13|47|1010}}{{extrasolar-planet-stub}} 6 : Exoplanets|Boötes|Transiting exoplanets|Hot Jupiters|Giant planets|Exoplanets discovered in 2007 |
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