TY - GEN
T1 - Enabling the direct detection of earth-sized exoplanets with the LBTI HOSTS project
T2 - Optical and Infrared Interferometry and Imaging V
AU - Danchi, W.
AU - Bailey, V.
AU - Bryden, G.
AU - Defrère, D.
AU - Ertel, S.
AU - Haniff, C.
AU - Hinz, P.
AU - Kennedy, G.
AU - Mennesson, B.
AU - Millan-Gabet, R.
AU - Rieke, G.
AU - Roberge, A.
AU - Serabyn, E.
AU - Skemer, A.
AU - Stapelfeldt, K.
AU - Weinberger, A.
AU - Wyatt, M.
AU - Vaz, A.
N1 - Publisher Copyright:
© 2016 SPIE.
PY - 2016
Y1 - 2016
N2 - NASA has funded a project called the Hunt for Observable Signatures of Terrestrial Systems (HOSTS) to survey nearby solar type stars to determine the amount of warm zodiacal dust in their habitable zones. The goal is not only to determine the luminosity distribution function but also to know which individual stars have the least amount of zodiacal dust. It is important to have this information for future missions that directly image exoplanets as this dust is the main source of astrophysical noise for them. The HOSTS project utilizes the Large Binocular Telescope Interferometer (LBTI), which consists of two 8.4-m apertures separated by a 14.4-m baseline on Mt. Graham, Arizona. The LBTI operates in a nulling mode in the mid-infrared spectral window (8-13 μm), in which light from the two telescopes is coherently combined with a 180 degree phase shift between them, producing a dark fringe at the location of the target star. In doing so the starlight is greatly reduced, increasing the contrast, analogous to a coronagraph operating at shorter wavelengths. The LBTI is a unique instrument, having only three warm reflections before the starlight reaches cold mirrors, giving it the best photometric sensitivity of any interferometer operating in the mid-infrared. It also has a superb Adaptive Optics (AO) system giving it Strehl ratios greater than 98% at 10 μm. In 2014 into early 2015 LBTI was undergoing commissioning. The HOSTS project team passed its Operational Readiness Review (ORR) in April 2015. The team recently published papers on the target sample, modeling of the nulled disk images, and initial results such as the detection of warm dust around I Corvi. Recently a paper was published on the data pipeline and on-sky performance. An additional paper is in preparation on β Leo. We will discuss the scientific and programmatic context for the LBTI project, and we will report recent progress, new results, and plans for the science verification phase that started in February 2016, and for the survey.
AB - NASA has funded a project called the Hunt for Observable Signatures of Terrestrial Systems (HOSTS) to survey nearby solar type stars to determine the amount of warm zodiacal dust in their habitable zones. The goal is not only to determine the luminosity distribution function but also to know which individual stars have the least amount of zodiacal dust. It is important to have this information for future missions that directly image exoplanets as this dust is the main source of astrophysical noise for them. The HOSTS project utilizes the Large Binocular Telescope Interferometer (LBTI), which consists of two 8.4-m apertures separated by a 14.4-m baseline on Mt. Graham, Arizona. The LBTI operates in a nulling mode in the mid-infrared spectral window (8-13 μm), in which light from the two telescopes is coherently combined with a 180 degree phase shift between them, producing a dark fringe at the location of the target star. In doing so the starlight is greatly reduced, increasing the contrast, analogous to a coronagraph operating at shorter wavelengths. The LBTI is a unique instrument, having only three warm reflections before the starlight reaches cold mirrors, giving it the best photometric sensitivity of any interferometer operating in the mid-infrared. It also has a superb Adaptive Optics (AO) system giving it Strehl ratios greater than 98% at 10 μm. In 2014 into early 2015 LBTI was undergoing commissioning. The HOSTS project team passed its Operational Readiness Review (ORR) in April 2015. The team recently published papers on the target sample, modeling of the nulled disk images, and initial results such as the detection of warm dust around I Corvi. Recently a paper was published on the data pipeline and on-sky performance. An additional paper is in preparation on β Leo. We will discuss the scientific and programmatic context for the LBTI project, and we will report recent progress, new results, and plans for the science verification phase that started in February 2016, and for the survey.
KW - Debris Disks
KW - Exoplanet Detection
KW - Exozodiacal Dust
KW - Infrared Astronomy
KW - Nulling Interferometry
KW - Stellar Interferometry
UR - http://www.scopus.com/inward/record.url?scp=85006850987&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85006850987&partnerID=8YFLogxK
U2 - 10.1117/12.2233397
DO - 10.1117/12.2233397
M3 - Conference contribution
AN - SCOPUS:85006850987
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Optical and Infrared Interferometry and Imaging V
A2 - Creech-Eakman, Michelle J.
A2 - Malbet, Fabien
A2 - Tuthill, Peter G.
PB - SPIE
Y2 - 27 June 2016 through 1 July 2016
ER -