TY - JOUR
T1 - Subaru HDS transmission spectroscopy of the transiting extrasolar planet HD 209458b
AU - Narita, Norio
AU - Suto, Yasushi
AU - Winn, Joshua N.
AU - Turner, Edwin L.
AU - Aoki, Wako
AU - Leigh, Christopher J.
AU - Sato, Bun'ei
AU - Tamura, Motohide
AU - Yamada, Toru
PY - 2005
Y1 - 2005
N2 - We have searched for absorption in several common atomic species due to the atmosphere or exosphere of the transiting extrasolar planet HD 209458b, using high precision optical spectra obtained with the Subaru High Dispersion Spectrograph (HDS). Previously we reported an upper limit on Hα absorption of 0.1% (3σ) within a 5.1 Å band. Using the same procedure, we now report upper limits on absorption due to the optical transitions of Na D, Li, Hα, Hβ, Hγ, Fe, and Ca. The 3σ upper limit for each transition is approximately 1% within a 0.3 Å band (the core of the line), and a few tenths of a per cent within a 2 Å band (the full line width). The wide-band results are close to the expected limit due to photon-counting (Poisson) statistics, although in the narrow-band case we have encountered unexplained systematic errors at a few times the Poisson level. These results are consistent with all previously reported detections and upper limits, but are significantly more sensitive.
AB - We have searched for absorption in several common atomic species due to the atmosphere or exosphere of the transiting extrasolar planet HD 209458b, using high precision optical spectra obtained with the Subaru High Dispersion Spectrograph (HDS). Previously we reported an upper limit on Hα absorption of 0.1% (3σ) within a 5.1 Å band. Using the same procedure, we now report upper limits on absorption due to the optical transitions of Na D, Li, Hα, Hβ, Hγ, Fe, and Ca. The 3σ upper limit for each transition is approximately 1% within a 0.3 Å band (the core of the line), and a few tenths of a per cent within a 2 Å band (the full line width). The wide-band results are close to the expected limit due to photon-counting (Poisson) statistics, although in the narrow-band case we have encountered unexplained systematic errors at a few times the Poisson level. These results are consistent with all previously reported detections and upper limits, but are significantly more sensitive.
KW - Stars: planetary systems: individual (HD 209458b)
KW - Techniques: spectroscopic
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U2 - 10.1093/pasj/57.3.471
DO - 10.1093/pasj/57.3.471
M3 - Review article
AN - SCOPUS:22544445842
SN - 0004-6264
VL - 57
SP - 471
EP - 480
JO - Publications of the Astronomical Society of Japan
JF - Publications of the Astronomical Society of Japan
IS - 3
ER -