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Coronagraphy and Interferometry: Imaging the sky at high contrast and high-angular resolution

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Coronagraphy and Interferometry

Imaging the sky at high contrast and high-angular resolution

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Proxima b

Imaged exoplanets

b c d e f g

Known exoplanets

(3)

Coronagraphy

http://www.vortex.ulg.ac.be

(AEOS AND HOLOLAB)

(4)

Main activities

• Exoplanets and disks

• Image processing

• Coronagraphic instruments

• Phase mask design

• Optical testing

• Wave front sensing

(5)

Ground-based observations

LBT — Arizona Keck — Hawaii VL T — Ce rro Pa ran al

(6)

Science highlights

50 AU

Absil et al. (2013)

Biller et al. (2014), Reggiani et al. (2014)

HD 169142 @ VLT/NACO

HIP 79124 @ Keck/NIRC2

Serabyn et al. (2017) Reggiani et al. (subm.)

MWC 758 @ Keck/NIRC2

Beta Pic @ VLT/NACO

HIP 1***** @ Keck/NIRC2

HR8799 @ LBT/LMIRCam

Gomez et al. (2017) Choquet et al. in prep

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Near-term future

Towards imaging rocky planets

VLT/VISIR

ELT/METIS

Search for HZ planets around

α Cen A&B

Search for HZ planets around

nearby MS stars

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Interferometry

J. Surdej

O. Absil

D. Defrere

L. Marion

E. Gosset

Diameter of Jupiter measured by Interferometry from the roof of the Physics

building (Nov. 2016)

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Main activities

• Exoplanets, disks, stars

• Advanced data reduction

• Instrumentation

VLT Interferometer

LBT Interferometer

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Prevalence of exozodiacal dust (e.g., Absil et al. 2013, Nunez et al. 2017)

Science highlights

Io’s volcanic activity (e.g., de Kleer et al. 2017) Orbit of massive star binaries

(e.g., de Becker et al. 2012, Gosset et al. in prep)

Fraction of binaries (Marion et al. 2014)

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Near-term future

http://www.biosignatures.ulg.ac.be/hi-5/index.html

• Second-generation VLTI instruments: GRAVITY (since

2016) and MATISSE (2019)

• New VLTI instrument to study planet formation and HZ

of nearby MS stars:

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Long-term future

• Planetary atmospheres

• Biosignatures

Références

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