| DOI | Resolve DOI: https://doi.org/10.1117/12.925563 |
|---|
| Author | Search for: Maire, Anne-Lise; Search for: Galicher, Raphaël1; Search for: Boccaletti, Anthony; Search for: Baudoz, Pierre; Search for: Schneider, Jean; Search for: Cahoy, Kerri; Search for: Stam, Daphne; Search for: Traub, Wesley |
|---|
| Affiliation | - National Research Council of Canada. National Science Infrastructure
|
|---|
| Format | Text, Article |
|---|
| Conference | Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, July 1-6, 2012, Amsterdam, Netherlands |
|---|
| Subject | Atmosphere models; Atmospheric characterization; Exo-planets; High angular resolutions; High contrast imaging; Integral field; Jupiters; Metallicities; Parameter spaces; Potential targets; Solar type stars; Spectral properties; Surface coverages; Technical feasibility; Computer simulation; Imaging techniques; Instruments; Millimeter waves; Space telescopes; Stars; Earth (planet) |
|---|
| Abstract | Several small space coronagraphs have been proposed to characterize cold exoplanets in reected light. Studies have mainly focused on technical feasibility because of the huge star/planet ux ratio to achieve in the close-in stellar environment (108-1010 at 0.2). However, the main interest of such instruments, the analysis of planet properties, has remained highly unexplored so far. We performed numerical simulations to assess the ability of a small space coronagraph to retrieve spectra of mature Jupiters, Neptunes and super-Earths under realistic assumptions. We describe our assumptions: exoplanetary atmosphere models, instrument numerical simulation and observing conditions. Then, we define a criterion and use it to determine the required exposure times to measure several planet parameters from their spectra (separation, metallicity, cloud and surface coverages) for particular cases. Finally, we attempt to define a parameter space of the potential targets. In the case of a solar-type star, we show that a small coronagraph can characterize the spectral properties of a 2-AU Jupiter up to 10 pc and the cloud and surface coverage of super-Earths in the habitable zone for a few stars within 4{5 pc. Potentially, SPICES could perform analysis of a hypothetical Earth-size planet around α Cen A and B. |
|---|
| Publication date | 2012-08-22 |
|---|
| In | |
|---|
| Series | |
|---|
| Language | English |
|---|
| Peer reviewed | Yes |
|---|
| NPARC number | 21270295 |
|---|
| Export citation | Export as RIS |
|---|
| Report a correction | Report a correction (opens in a new tab) |
|---|
| Record identifier | 548990f5-8f30-4891-a1dd-4abf0843b153 |
|---|
| Record created | 2014-01-21 |
|---|
| Record modified | 2020-04-21 |
|---|
