NDLI: Brown dwarf characterization with EChO

Content Provider	Springer Nature Link
Author	Morales, J. C. Beaulieu, J. P. Coudé du Foresto, V. Drossart, P. Tinetti, G.
Copyright Year	2015
Abstract	The Exoplanet Characterization Observatory (EChO) is a space mission concept dedicated to the analysis of exoplanet atmospheres using low-resolution spectroscopy in the infrared region between 0.55 and 11 μm. A fraction of its time will be used for ancillary science. We discuss here the prospect of a small survey of L and T-type brown dwarfs. These cold objects show properties comparable to those of giant planets, with the advantage of being brighter and not perturbed by host stars, therefore, they are very useful to understand processes and properties of planet atmospheres. At the same time, brown dwarfs still pose some challenges to stellar models that must include the formation of clouds and sedimentation processes that occur at the low temperatures of these objects. Hence, our aim is to build up an homogeneous catalogue of spectra of brown dwarfs as well as to characterize the spectral variability observed on some of them, which is attributed to the presence of clouds in their atmospheres. We demonstrate that EChO could provide the spectra of brown dwarfs between 1 and 11 μm with enough accuracy to reach these goals. We also present the current number of known brown dwarfs and we suggest a list of possible targets, although future surveys will probably provide better targets at the time of EChO launch if the mission is selected.
Starting Page	733
Ending Page	751
Page Count	19
File Format	PDF
ISSN	09226435
Journal	Experimental Astronomy
Volume Number	40
Issue Number	2-3
e-ISSN	15729508
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-01-18
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Brown dwarfs Stars: fundamental parameters Stars: atmospheres Instrumentation: spectrographs Techniques: spectroscopic Astronomy, Observations and Techniques Statistics for Engineering, Physics, Computer Science, Chemistry and Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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