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A new look at NICMOS transmission spectroscopy of HD189733, GJ-436 and XO-1: no conclusive evidence for molecular features

Abstract:

We present a re-analysis of archival HST/NICMOS transmission spectroscopy of three exoplanet systems; HD 189733, GJ-436 and XO-1. Detections of several molecules, including H20, CH4 and CO2, have been claimed for HD 189733 and XO-1, but similarly sized features are attributed to systematic noise for GJ-436. The data consist of time-series grism spectra covering a planetary transit. After extracting light curves in independent wavelength channels, we use a linear decorrelation technique accoun...

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Publication status:
Published

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Publisher copy:
10.1017/S1743921311020874

Authors


More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Astrophysics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Astrophysics
Role:
Author
Host title:
ASTROPHYSICS OF PLANETARY SYSTEMS: FORMATION, STRUCTURE, AND DYNAMICAL EVOLUTION
Volume:
276
Issue:
S276
Pages:
478-479
Publication date:
2010-10-08
DOI:
EISSN:
1743-9221
ISSN:
1743-9213
ISBN:
9780521196529
Keywords:
Pubs id:
pubs:310816
UUID:
uuid:0a5a94d4-5599-4cd6-b146-10e8bcf7653a
Local pid:
pubs:310816
Source identifiers:
310816
Deposit date:
2012-12-19

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