2009ApJ...699L..48D


Query : 2009ApJ...699L..48D

2009ApJ...699L..48D - Astrophys. J., 699, L48-L51 (2009/July-1)

Follow-up observations of the Neptune mass transiting extrasolar planet HAT-P-11b.

DITTMANN J.A., CLOSE L.M., GREEN E.M., SCUDERI L.J. and MALES J.R.

Abstract (from CDS):

We have confirmed the existence of the transiting super Neptune extrasolar planet HAT-P-11b. On 2009 May 1 UT, the transit of HAT-P-11b was detected at the University of Arizona's 1.55 m Kuiper telescope with 1.7 millimag rms accuracy. We find a central transit time of Tc= 2454952.92534±0.00060 BJD; this transit occurred 80±73 s sooner than previous measurements (71 orbits in the past) would have predicted. Hence, our transit timing rules out the presence of any large (>200 s) deviations from the ephemeris of Bakos et al. We obtain a slightly more accurate period of P = 4.8878045±0.0000043 days. We measure a slightly larger planetary radius of Rp= 0.452±0.020 RJ(5.07±0.22 R) compared to Bakos and coworkers' value of 0.422±0.014 RJ(4.73±0.16 R). Our values confirm that HAT-P-11b is very similar to GJ 436b (the only other known transiting super Neptune) in radius and other bulk properties.

Abstract Copyright:

Journal keyword(s): planetary systems - stars: individual: HAT-P-11

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 - 2024
#notes
1 CoRoT-7b Pl 06 43 49.4690164104 -01 03 46.826642700           ~ 402 1
2 Ross 905b Pl 11 42 11.0933350978 +26 42 23.650782778           ~ 811 1
3 BD+47 2936 EB* 19 50 50.2472976936 +48 04 51.101390496       8.8   K4V 300 2
4 BD+47 2936b Pl 19 50 50.2472976936 +48 04 51.101390496           ~ 416 1

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