Direct imaging and spectroscopy of exoplanets with the ELT/HARMONI high-contrast module

2013 ◽

Vol 8 (S299) ◽

pp. 1-11 ◽

Cited By ~ 2

Author(s):

Beth Biller

Keyword(s):

Extrasolar Planets ◽

Direct Detection ◽

High Mass ◽

High Contrast ◽

Future Prospects ◽

Contrast Imaging ◽

Direct Imaging ◽

Planet Detection ◽

High Contrast Imaging ◽

Imaging And Spectroscopy

AbstractThe last decade has yielded the first images of exoplanets, considerably advancing our understanding of the properties of young giant planets. In this talk I will discuss current results from ongoing direct imaging efforts as well as future prospects for detection and characterization of exoplanets via high contrast imaging. Direct detection, and direct spectroscopy in particular, have great potential for advancing our understanding of extrasolar planets. In combination with other methods of planet detection, direct imaging and spectroscopy will allow us to eventually: 1) study the physical properties of exoplanets (colors, temperatures, etc.) in depth and 2) fully map out the architecture of typical planetary systems. Direct imaging has offered us the first glimpse into the atmospheric properties of young high-mass (3-10 MJup) exoplanets. Deep direct imaging surveys for exoplanets have also yielded the strongest constraints to date on the statistical properties of wide giant exoplanets. A number of extremely high contrast exoplanet imaging instruments have recently come online or will come online within the next year (including Project 1640, SCExAO, SPHERE, GPI, among others). I will discuss future prospects with these instruments.

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Extreme Adaptive Optics

Annual Review of Astronomy and Astrophysics ◽

10.1146/annurev-astro-081817-052000 ◽

2018 ◽

Vol 56 (1) ◽

pp. 315-355 ◽

Cited By ~ 16

Author(s):

Olivier Guyon

Keyword(s):

Adaptive Optics ◽

Thermal Emission ◽

Contrast Ratio ◽

Angular Separation ◽

Circumstellar Disks ◽

Spectroscopic Characterization ◽

Central Star ◽

High Contrast ◽

Direct Imaging ◽

Segmented Mirror

Over the last two decades, several thousand exoplanets have been identified, and their study has become a high scientific priority. Direct imaging of nearby exoplanets and the circumstellar disks in which they form and evolve is challenging due to the high contrast ratio and small angular separation relative to the central star. Exoplanets are typically within 1 arcsec of, and between 4 and 10 orders of magnitude fainter than, the stars they orbit. To meet these challenges, ground-based telescopes must be equipped with extreme adaptive optics (ExAO) systems optimized to acquire high-contrast images of the immediate surrounding of nearby bright stars. Current ExAO systems have the sensitivity to image thermal emission from young massive planets in near-IR, while future systems deployed on Giant Segmented Mirror Telescopes will image starlight reflected by lower-mass rocky planets. Thanks to rapid progress in optical coronagraphy, wavefront control, and data analysis techniques, direct imaging and spectroscopic characterization of habitable exoplanets will be within reach of the next generation of large ground-based telescopes.

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High-fidelity photometry and astrometry of high-contrast imaged companions using LOCI processing.

Proceedings of the International Astronomical Union ◽

10.1017/s1743921313007795 ◽

2013 ◽

Vol 8 (S299) ◽

pp. 44-45

Author(s):

Jérôme Maire ◽

Jonathan Gagné ◽

David Lafrenière ◽

James R. Graham ◽

René Doyon

Keyword(s):

Contrast Ratio ◽

Angular Separation ◽

Speckle Noise ◽

High Contrast ◽

Contrast Imaging ◽

High Contrast Imaging ◽

Suppression Technique ◽

Imaging And Spectroscopy ◽

And Migration ◽

Imaging Performance

RésuméDirect imaging and spectroscopy of exoplanets is a key element for understanding planet formation and migration. Such direct detections and characterizations remains technologically challenging, since a very high contrast ratio and small angular separation are involved, and futhermore speckle noise limits the high-contrast imaging performance. We further discuss a speckle subtraction and suppression technique that fully takes advantage of spectral and time-domain information on quasi-static speckles to measure the highest-fidelity photometry as well as accurate astrometry of detected companions.

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Direct Imaging and Spectroscopy of Substellar Companions Next to Young Nearby Stars in TWA

The Origins of Stars and Planets: The VLT View - ESO Astrophysics Symposia ◽

10.1007/978-3-662-40277-1_50 ◽

2002 ◽

pp. 381-388 ◽

Cited By ~ 1

Author(s):

Ralph Neuhäuser ◽

Eike Guenther ◽

Wolfgang Brandner ◽

Nuria Húelamo ◽

Thomas Ott ◽

...

Keyword(s):

Direct Imaging ◽

Nearby Stars ◽

Substellar Companions ◽

Imaging And Spectroscopy

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How many suns are in the sky? Multiplicity surveys of exoplanet host stars

Proceedings of the International Astronomical Union ◽

10.1017/s1743921319001595 ◽

2018 ◽

Vol 14 (S345) ◽

pp. 316-317 ◽

Cited By ~ 1

Author(s):

M. Mugrauer ◽

C. Ginski ◽

N. Vogt ◽

R. Neuhäuser ◽

C. Adam

Keyword(s):

Milky Way ◽

Planet Formation ◽

High Contrast ◽

Contrast Imaging ◽

Direct Imaging ◽

High Contrast Imaging ◽

Multiple Stars ◽

First Results ◽

Formation And Evolution ◽

Host Stars

AbstractIn order to determine the true impact of stellar multiplicity on the formation and evolution of planets, we initiated direct imaging surveys to search for (sub)stellar companions of exoplanet host stars on close orbits, as their gravitational impact on the planet bearing disk at first and on formed planets afterwards is expected to be maximal. According to theory these are the most challenging environments for planet formation and evolution but might occur quite frequently in the milky way, due to the large number of multiple stars within our galaxy. On this poster we showed results, obtained so far in the course of our AO and Lucky-imaging campaigns of exoplanet host stars, conducted with NACO/ESO-VLT for southern and with AstraLux/CAHA2.2m for northern targets, respectively. In addition, we introduced our new high contrast imaging survey with SPHERE/ESO-VLT to search for close companions of southern exoplanet host stars, and presented some first results.

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Strategic Exploration of Exoplanets and Disks with Subaru: SEEDS

Proceedings of the International Astronomical Union ◽

10.1017/s1743921311020692 ◽

2010 ◽

Vol 6 (S276) ◽

pp. 436-437

Author(s):

Nobuhiko Kusakabe ◽

Motohide Tamura ◽

Ryo Kandori ◽

Tomoyuki Kudo ◽

Jun Hashimoto ◽

...

Keyword(s):

Adaptive Optics ◽

Young Stars ◽

Giant Planets ◽

Current Status ◽

High Contrast ◽

Direct Imaging ◽

Instrument Performance ◽

Early Results ◽

Solar Type ◽

Adaptive Optics System

AbstractThe purpose of the SEEDS project (PI: M. Tamura) is to conduct a direct imaging survey, searching for giant planets as well as protoplanetary/debris disks at a few to a few tens of AU regions around 500 nearby solar-type or more massive young stars with the combination of the Subaru 8.2m telescope, the new high-contrast instrument HiCIAO, and the adaptive optics system AO188. After instrument performance verification, the SEEDS survey successfully started in October 2009. We have already detected many companion candidates to be followed-up, and clear and much better detections of disks or details of known disks structures. In this contribution, we will outline our goal, current status, early results, and future instrumentation plans.

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Direct imaging and spectroscopy of planets around young stars: GQ Lupi

Proceedings of the International Astronomical Union ◽

10.1017/s1743921306009057 ◽

2005 ◽

Vol 1 (C200) ◽

pp. 41-46

Author(s):

Ralph Neuhäuser ◽

Christopher Broeg ◽

Markus Mugrauer ◽

Eike Guenther

Keyword(s):

Young Stars ◽

Direct Imaging ◽

Imaging And Spectroscopy

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A Direct Imaging Study to Search for and to Characterize Planetary Mass Companions

Proceedings of the International Astronomical Union ◽

10.1017/s1743921313007941 ◽

2013 ◽

Vol 8 (S299) ◽

pp. 74-75

Author(s):

K. Ward-Duong ◽

J. Patience ◽

R. J. De Rosa ◽

A. Rajan ◽

P. Hinz ◽

...

Keyword(s):

Angular Resolution ◽

Imaging Study ◽

High Angular Resolution ◽

Evolutionary Models ◽

Direct Imaging ◽

Planetary Mass ◽

Substellar Companions ◽

Imaging And Spectroscopy ◽

M Stars

AbstractWe present preliminary results from two parallel programs to search for new substellar companions to nearby, young M-stars and to characterize the atmospheres of known planetary mass and temperature substellar companions. For the M-star survey, we are analyzing high angular resolution archival data on systems within 15pc, complementing a subset with well-determined young ages based on measurements of several age indicators. The results include stellar and substellar companion candidates, which we are currently pursuing with follow-up second epoch images. The characterization component of the project involves using LBT LMIRCam and MMT ARIES direct imaging and spectroscopy data to investigate the atmospheres of known young substellar companions with masses overlapping the planetary regime. These atmospheric studies will represent an analogous comparison to the atmospheres of young imaged planets, and provide a means to fundamentally test evolutionary models, enhancing our understanding of the overall substellar population.

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