WASP-11b/HAT-P-10b

Planetbox begin
name = WASP-11b/HAT-P-10b Planetbox star
star = WASP-11/HAT-P-10cite web|url=http://exoplanet.eu/star.php?st=WASP-11/HAT-P-10|title=Notes for star WASP-11/HAT-P-10|author=Schneider, J.|work=The Extrasolar Planets Encyclopaedia|accessdate=2008-09-29]
RA = RA|03|09|28.55cite arXiv|title=HAT-P-10b: A light and moderately hot Jupiter transiting a K dwarf|author=Bakos, G. A. "et al."|eprint=0809.4295|class=astro-ph|year=2008|version=v1|accessdate=2008-09-26]
DEC = DEC|+30|40|24.9
constell = Perseus
dist_ly = 408±|20|16
dist_pc = 125±|6|5
class = K3Vcite arXiv|title=The sub-Jupiter mass transiting exoplanet WASP-11b|author=West, R. G. "et al."|year=2008|accessdate=2008-09-26|eprint=0809.4597|version=v1|class=astro-ph] Planetbox orbit
semimajor = 0.0439±|0.0006|0.0009
period = 3.7224690 ± 0.0000067
inclination = 88.5 ± 0.6
eccentricity = 0
t_transit = 2454729.90631 ± 0.00030
semi-amp = 69.1 ± 3.5Planetbox character
mass = 0.460 ± 0.028
radius = 1.045±|0.050|0.033
density = 498 ± 64
gravity = 10.5
temperature = 1030±|26|19Assumes the planet has zero albedo. Its secondary transit of the planet behind its star has not yet been observed and so the temperature provided is a hypothetical "equilibrium temperature".] Planetbox discovery
discovery_date = April 1, 2008 (announced)
September 26, 2008 (preprints)
discoverers = West et al. (SuperWASP)
Bakos et al. (HATNet)
discovery_method = Transit
discovery_status=Independently confirmedPlanetbox catalog
names = WASP-11b, HAT-P-10b

WASP-11b/HAT-P-10b is an extrasolar planet discovered in 2008. The discovery was announced (under the designation WASP-11b) by press release by the SuperWASP project in April 2008 along with planets WASP-6b through to WASP-15b, however at this stage more data was needed to confirm the parameters of the planets and the coordinates were not given. [cite web|url=http://www.superwasp.org/wasp_planets.htm|title=The Planets|work=SuperWASP|accessdate=2008-09-26] On 26 September 2008, the HATNet Project's paper describing the planet which they designated HAT-P-10b appeared on the arXiv preprint server. The SuperWASP team's paper appeared as a preprint on the Extrasolar Planets Encyclopaedia on the same day, confirming that the two objects (WASP-11b and HAT-P-10b) were in fact the same, and the teams agreed to use the combined designation.

The planet has the third lowest insolation of the known transiting planets (only Gliese 436 b and HD 17156 b have lower insolation). The temperature implies it falls into the pL class of hot Jupiters: planets which lack significant quantities of titanium(II) oxide and vanadium(II) oxide in their atmospheres and do not have temperature inversions. [cite journal|url=http://www.journals.uchicago.edu/doi/abs/10.1086/528370|author=Fortney, J. J. "et al."|title=A Unified Theory for the Atmospheres of the Hot and Very Hot Jupiters: Two Classes of Irradiated Atmospheres|journal=The Astrophysical Journal|year=2008|volume=678|pages=1419–1435|doi=10.1086/528370|bibcode=2008ApJ...678.1419F] An alternative classification system for hot Jupiters is based on the equilibrium temperature and the planet's Safronov number. [The Safronov number is defined as $extstyle\; Theta\; =\; frac\{1\}\{2\}\; left(frac\{mathrm\{Planetary\; escape\; velocity\{mathrm\{Orbital\; velocity\; ight)^2$] In this scheme, for a given temperature, class I planets have high Safronov numbers and tend to be in orbit around cooler host stars, while class II planets have lower Safronov numbers. [cite journal|url=http://www.journals.uchicago.edu/doi/abs/10.1086/523038?journalCode=apj|title=Two Classes of Hot Jupiters|author=Hansen, B. M. S. and Barman, T.|year=2007|journal=The Astrophysical Journal|volume=671|pages=861–871|doi=10.1086/523038|bibcode=2007ApJ...671..861H] In the case of WASP-11b/HAT-P-10b, the equilibrium temperature is 1030 K and the Safronov number is 0.047±0.003, which means it is located close to the dividing line between the class I and class II planets.

Notes

References

ee also

*OGLE-TR-111b