2007A&A...471L..51G

Query : 2007A&A...471L..51G

2007A&A...471L..51G - Astronomy and Astrophysics, volume 471L51-54 (2007/9-1)

Accurate Spitzer infrared radius measurement for the hot Neptune GJ 436b.

GILLON M., DEMORY B.-O., BARMAN T., BONFILS X., MAZEH T., PONT F., UDRY S., MAYOR M. and QUELOZ D.

Abstract (from CDS):

We present Spitzer Space Telescope infrared photometry of a primary transit of the hot Neptune GJ 436b. The observations were obtained using the 8 µm band of the InfraRed Array Camera (IRAC). The high accuracy of the transit data and the weak limb-darkening in the 8 µm IRAC band allow us to derive (assuming M=0.44±0.04M☉ for the primary) a precise value for the planetary radius (4.19+0.21–0.16R⊕), the stellar radius (0.463+0.022–0.017R☉), the orbital inclination (85.90°+0.19°–0.18°) and transit timing (2454280.78186+0.00015–0.00008HJD). Assuming current planet models, an internal structure similar to that of Neptune with a small H/He envelope is necessary to account for the measured radius of GJ 436b.

Abstract Copyright: ∼

Journal keyword(s): techniques: photometric - eclipses - stars: individual: GJ 436 - planetary systems - infrared: general

VizieR on-line data: <Available at CDS (J/A+A/471/L51): phot.dat>

Errata: erratum vol. 490, p. L1 (2008)

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Ross 905b Pl 11 42 11.0933350978 +26 42 23.650782778           ~ 913 1
2 Ross 905 PM* 11 42 11.0933350978 +26 42 23.650782778   12.06 10.613 10.272 8.24 M3V 750 1
3 HD 189733b Pl 20 00 43.7129433648 +22 42 39.073143456           ~ 1610 1
4 HD 209458b Pl 22 03 10.7727465312 +18 53 03.549393384           ~ 2037 1

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