2014A&A...563A..41M


C.D.S. - SIMBAD4 rel 1.7 - 2019.08.22CEST01:27:34

2014A&A...563A..41M - Astronomy and Astrophysics, volume 563A, 41-41 (2014/3-1)

The GTC exoplanet transit spectroscopy survey. I. OSIRIS transmission spectroscopy of the short period planet WASP-43b.

MURGAS F., PALLE E., ZAPATERO OSORIO M.R., NORTMANN L., HOYER S. and CABRERA-LAVERS A.

Abstract (from CDS):

In this work, we use long-slit spectroscopy observations of a transit event of the close-in orbiting planet WASP-43b (Mp=2.034MJup, Rp=1.036RJup) in an effort to detect its atmosphere. We used the Gran Telescopio Canarias (GTC) instrument OSIRIS to obtain long-slit spectra in the optical range 520-1040nm of the planetary host star WASP-43 and of a reference star during a full primary transit event and four partial transit observations. We integrated the stellar flux of both stars in different wavelength regions producing several light curves. We fitted transit models to these curves to measure the star-to-planet radius ratio, Rp/Rs, across wavelength among other physical parameters. We measure a mean planet-to-star radius ratio in the white light curve of 0.15988+0.00133–0.00145. Using broadband filters, we detect the color signature of WASP-43. We present a tentative detection in the planet-to-star radius ratio around the Nai doublet (λ 588.9, 589.5nm) when compared to the nearby continuum at the 2.9σ level. We find no significant excess of the measured planet-to-star radius ratio around the Ki doublet (λ 766.5nm, 769.9nm) when compared to the nearby continuum. Combining our observations with previously published epochs, we refine the estimation of the orbital period. Using a linear ephemeris, we obtained a period of P=0.81347385±1.5x10–7-days. Using a quadratic ephemeris, we obtained an orbital period of 0.81347688±8.6x10–7-days, and a change in this parameter of {dot}(P)=-0.15±0.06s/year. As previous results, this hints to the orbital decay of this planet although a timing analysis over several years needs to be made to confirm this.

Abstract Copyright:

Journal keyword(s): planets and satellites: atmospheres - planets and satellites: gaseous planets - techniques: spectroscopic

VizieR on-line data: <Available at CDS (J/A+A/563/A41): table1.dat table2.dat table3.dat table4.dat>

Simbad objects: 12

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Number of rows : 12

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 WASP-18b Pl 01 37 25.0335097438 -45 40 40.376513381           ~ 180 1
2 CoRoT-7b Pl 06 43 49.4690410679 -01 03 46.825797768           ~ 328 1
3 NAME XO-2Nb Pl 07 48 06.4726006390 +50 13 32.921121328           ~ 126 1
4 * rho01 Cnc e Pl 08 52 35.81093 +28 19 50.9511           ~ 350 1
5 WASP-19b Pl 09 53 40.0764883458 -45 39 33.055979403           ~ 213 1
6 WASP-43b Pl 10 19 38.0089444408 -09 48 22.603103969           ~ 166 1
7 WASP-43 PM* 10 19 38.0089444408 -09 48 22.603103969   13.4 12.4 12.08 11.10 K7V 68 1
8 2MASS J10200126-0948099 * 10 20 01.2672396349 -09 48 09.988468600           ~ 2 0
9 NAME KIC 12557548b Pl? 19 23 51.8899069766 +51 30 16.983558676           ~ 54 1
10 WTS-2b Pl 19 34 55.8667829791 +36 48 55.847125414           ~ 10 2
11 HD 189733b Pl 20 00 43.7130382888 +22 42 39.071811263           ~ 987 1
12 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1373 1

    Equat.    Gal    SGal    Ecl

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2019.08.22-01:27:34

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