ORBi: Absil Olivier - Direct imaging of Earth-like planets: why we care about exozodis

Reference : Direct imaging of Earth-like planets: why we care about exozodis


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
	To cite this reference:	http://hdl.handle.net/2268/81502

Title :	Direct imaging of Earth-like planets: why we care about exozodis
Language :	English
Author, co-author :	Absil, Olivier [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
	Defrère, D. [Max-Planck-Institut fur Radioastronomie (Belgium)]
	Roberge, A. [NASA Goddard Space Flight Ctr. (USA)]
	Augereau, J.-C. [Lab. d'Astrophysique de Grenoble, CNRS, Univ. Joseph Fourier (France)]
	Coudé Du Foresto, V. [LESIA, CNRS, Observatoire de Paris à Meudon (France)]
	Hanot, Charles [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
	Stark, C. [Univ. of Maryland, College Park (USA)]
	Surdej, Jean [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Publication date :	Jul-2010
Main document title :	Optical and Infrared Interferometry II
Editor :	Danchi, W. C.
	Delplancke, F.
	Rajagopal, J. K.
Publisher :	SPIE
Collection and collection volume :	Proceedings of the SPIE, volume 7734
Pages :	0L.1-0L.10
On invitation :	Yes
Audience :	International
City :	Bellingham
Country :	WA, USA
Event name :	Astronomical Telescopes and Instrumentation 2010: Optical and Infrared Interferometry II
Event date :	27/06/2010 - 2/07/2010
Event organizer :	SPIE
Event place (city) :	San Diego
Event country :	CA, USA
Abstract :	[en] The presence of large amounts of exozodiacal dust around nearby main sequence stars is considered as a potential threat for the direct detection of Earth-like exoplanets (exoEarths) with future space-based coronagraphic and interferometric missions. In this paper, we estimate the amount of exozodiacal light that can be tolerated around various stellar types without jeopardizing the detection of exoEarths with a space-based visible coronagraph or a free-flying mid-infrared interferometer. We also address the possible effects of resonant structures in exozodiacal disks. We then review the sensitivity of current ground-based interferometric instruments to exozodiacal disks, based on classical visibility measurements and on the nulling technique. We show that the current instrumental performances are not sufficient to help prepare future exoEarth imaging missions, and discuss how new groundor space-based instruments could improve the current sensitivity to exozodiacal disks down to a suitable level.
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/81502
DOI :	10.1117/12.858257
Other URL :	http://adsabs.harvard.edu/abs/2010SPIE.7734E..17A

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	File	Commentary	Version	Size	Access
Open access	spie_exozodi_v2.pdf		Author preprint	252.22 kB	View/Open

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