TY - JOUR
T1 - Detection of sodium absorption in WASP-17b with magellan
AU - Zhou, G.
AU - Bayliss, D. D.R.
PY - 2012/11/1
Y1 - 2012/11/1
N2 - We present the detection of sodium absorption in the atmosphere of the extrasolar planet WASP-17b, an inflated 'hot Jupiter' in a tight orbit around an F6 dwarf. In-transit observations of WASP-17 made with the Magellan Inamori Kyocera Echelle (MIKE) spectrograph on the 6.5-m Magellan Telescope were analysed for excess planetary atmospheric absorption in the Na I 'D' doublet spectral region. Using the interstellar sodium absorption lines as reference, we detect a 0.58 ± 0.13 per cent transit signal, with 4.5σ confidence, at 1.5Å bandwidth around the stellar sodium absorption feature. This result is consistent with the previous Very Large Telescope detection of sodium in WASP-17b, confirming that the planet has a highly inflated atmosphere.
AB - We present the detection of sodium absorption in the atmosphere of the extrasolar planet WASP-17b, an inflated 'hot Jupiter' in a tight orbit around an F6 dwarf. In-transit observations of WASP-17 made with the Magellan Inamori Kyocera Echelle (MIKE) spectrograph on the 6.5-m Magellan Telescope were analysed for excess planetary atmospheric absorption in the Na I 'D' doublet spectral region. Using the interstellar sodium absorption lines as reference, we detect a 0.58 ± 0.13 per cent transit signal, with 4.5σ confidence, at 1.5Å bandwidth around the stellar sodium absorption feature. This result is consistent with the previous Very Large Telescope detection of sodium in WASP-17b, confirming that the planet has a highly inflated atmosphere.
KW - Methods: observational
KW - Planetary systems
KW - Planets and satellites: atmospheres
KW - Planets and satellites: individual: WASP-17b
KW - Stars: individual: WASP-17
KW - Techniques: spectroscopic
UR - http://www.scopus.com/inward/record.url?scp=84881618802&partnerID=8YFLogxK
U2 - 10.1111/j.1365-2966.2012.21817.x
DO - 10.1111/j.1365-2966.2012.21817.x
M3 - Article
SN - 0035-8711
VL - 426
SP - 2483
EP - 2488
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 3
ER -