Transit detection paper: "Detection of transits of the nearby hot Neptune GJ 436 b"
M. Gillon, F. Pont, B.-O. Demory, F. Mallmann, M. Mayor, T. Mazeh, D. Queloz, A. Shporer, S. Udry, C. Vuissoz 2007
A&A Letters accepted (astro-ph/0705.2219)

RV discovery paper: A Neptune-Mass Planet Orbiting the Nearby M Dwarf GJ 436
R.P. Butler, S.S. Vogt, G.W. Marcy, D.A. Fischer, J.T. Wright, G.W. Henry, G. Laughlin, J.J. Lissauer, 2004
ApJ 617, 580 (ADS)

 

Larger image

1.2-m Euler telescope V-band data GJ 436 b transit lightcurve

System parameters:

Parameter	Value	Reference
Stellar mass [M_Sun]	0.44 +/- 0.04	Maness et al. 2007
Stellar radius [R_Sun]	0.44 +/- 0.04	Gillon et al. 2007
Orbital period [d]	2.64385 +/- 0.00009	Maness et al. 2007
Orbital eccentricity	0.16 +/- 0.02	Maness et al. 2007
T_Transit [BJD]	2 454 222.616 +/- 0.001	Gillon et al. 2007
Transit impact parameter	0.84 +/- 0.03	Gillon et al. 2007
Orbital inclination [deg]	86.5 +/- 0.2	Gillon et al. 2007
Radius ratio	0.082 +/- 0.005	Gillon et al. 2007
Planet mass [M_Earth]	22.6 +/- 1.9	Gillon et al. 2007
Planet radius [R_Earth]	3.95 +/- 0.35	Gillon et al. 2007
Planet radius [km]	25200 +/- 2200	Gillon et al. 2007
Equilibrium temperature [K]	520--620	Gillon et al. 2007

Links:

Extrasolar planet page

Planet Search and Stellar Kinematics group page

Geneva observatory

University of Geneva

 

stephane.udry@obs.unige.ch