2006A&A...445..341H


C.D.S. - SIMBAD4 rel 1.7 - 2020.05.27CEST12:29:19

2006A&A...445..341H - Astronomy and Astrophysics, volume 445, 341-346 (2006/1-1)

A posteriori detection of the planetary transit of HD 189733b in the Hipparcos photometry.

HEBRARD G. and LECAVELIER DES ETANGS A.

Abstract (from CDS):

Using observations performed at the Haute-Provence Observatory, the detection of a 2.2-day orbital period extra-solar planet that transits the disk of its parent star, HD 189733, has been recently reported. We searched in the Hipparcos photometry Catalogue for possible detections of those transits. Statistic studies were performed on the Hipparcos data in order to detect transits of HD 189733b and to quantify the significance of their detection. With a high level of confidence, we find that Hipparcos likely observed one transit of HD 189733b in October 1991, and possibly two others in February 1991 and February 1993. Using the range of possible periods for HD 189733b, we find that the probability that none of those events are due to planetary transits but are instead all due to artifacts is lower than 0.15%. Using the 15-year temporal baseline available, we can measure the orbital period of the planet HD 189733b with particularly high accuracy. We obtain a period of 2.218574+0.000006–0.000010days, corresponding to an accuracy of ∼1s. Such accurate measurements might provide clues for the presence of companions.

Abstract Copyright:

Journal keyword(s): stars: individual: HD 189733 - stars: planetary systems

Status at CDS:  

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 HD 149026b Pl 16 30 29.6184841164 +38 20 50.310893575           ~ 295 1
2 HD 189733b Pl 20 00 43.7130382888 +22 42 39.071811263           ~ 1064 1
3 HD 189733 BY* 20 00 43.7130382888 +22 42 39.071811263 9.241 8.578 7.648 7.126 6.68 K2V 712 1
4 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1452 1
5 V* V376 Peg EP* 22 03 10.7729598762 +18 53 03.548248479   8.21 7.63     F9V 990 1

    Equat.    Gal    SGal    Ecl

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2020.05.27-12:29:19

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