Details

Autor(en) / Beteiligte

• Murgas, F
• Palle, E
• Zapatero Osorio, M R
• Nortmann, L
• Hoyer, S
• Cabrera-Lavers, A

Titel

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

Ist Teil von

• Astronomy and astrophysics (Berlin), 2014-03, Vol.563, p.np-np

Erscheinungsjahr

2014

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• In this work, we use long-slit spectroscopy observations of a transit event of the close-in orbiting planet WASP-43b (M[subp]=2.034 M[sub Jup, R[subp]=1.036 R[subJup] 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 520-1040 nm of the planetary host star WASP-43 and of a reference star during a full primary transit event and four partial transit observations. We measure a mean planet-to-star radius ratio in the white light curve of 0.15988[sub -0 .00145[sup +0 .00133]. 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 Na I doublet ([lambda] 588.9, 589.5 nm) when compared to the nearby continuum at the 2.9[sigma] level. 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.