2013A&A...551A..99C


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.14CET22:57:12

2013A&A...551A..99C - Astronomy and Astrophysics, volume 551A, 99-99 (2013/3-1)

On high-contrast characterization of nearby, short-period exoplanets with giant segmented-mirror telescopes.

CROSSFIELD I.J.M.

Abstract (from CDS):

Measurements of the frequency with which short-period planets occur around main sequence stars allows a direct prediction of the number and types of such planets that will be amenable to characterization by high-contrast instruments on future giant segmented-mirror telescopes (GSMTs). Adopting conservative assumptions, I predict of order 10 planets with radii Rp=1-8R and equilibrium temperatures ≲400K should be accessible around stars within 8pc of the Sun. These numbers are roughly the same for both near-infrared observations of scattered starlight and mid-infrared observations of planetary thermal emission, with the latter observations demonstrating greater relative sensitivity to smaller and cooler planets. Adopting the conservative assumption that planets with Rp=1-2R and Rp=2-4R occur with equal frequency. I predict a 40% chance that a planet with Rp=1-2R and equilibrium temperature 200-250K will accessible to high-contrast thermal infrared characterization; this would be a compelling object for further study. To validate these predictions, more detailed analyses are needed of the occurrence frequencies of low-mass planets around M dwarfs, both in the Kepler field and in the solar neighborhood. Several planets already discovered by radial velocity surveys will be accessible to near-infrared high-contrast GSMT observations, including the low-mass planets α Cen Bb and (depending on their albedos) GJ 139c and d, GJ 876b and c, and τ Cet b, c, and d; τ Cet f would be amenable to thermal infrared characterization. Further efforts to model the near-infrared reflectance and mid-infrared emission of these and other short-period planets are clearly warranted, and will pave the way for the interpretation of future high-contrast characterization of a variety of planets around the nearest stars.

Abstract Copyright:

Journal keyword(s): planets and satellites: general - planets and satellites: detection - instrumentation: adaptive optics - methods: numerical - techniques: high angular resolution

Simbad objects: 13

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Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * tau Cet PM* 01 44 04.0834226 -15 56 14.926552 4.43 4.22 3.50 2.88 2.41 G8V 1071 1
2 * e Eri d Pl 03 19 55.65093 -43 04 11.2175           ~ 13 1
3 * e Eri c Pl 03 19 55.65093 -43 04 11.2175           ~ 14 1
4 * alf CMa SB* 06 45 08.91728 -16 42 58.0171 -1.51 -1.46 -1.46 -1.46 -1.43 A1V+DA 1377 0
5 * alf CMi SB* 07 39 18.11950 +05 13 29.9552 0.82 0.79 0.37 -0.05 -0.28 F5IV-V+DQZ 1743 0
6 V* V645 Cen Fl* 14 29 42.9451234609 -62 40 46.170818907 14.21 12.95 11.13 9.45 7.41 M5.5Ve 902 0
7 * alf Cen Bb err 14 39 35.06 -60 50 15.1           ~ 35 2
8 * alf Cen B PM* 14 39 35.06311 -60 50 15.0992 2.89 2.21 1.33     K1V 869 1
9 * alf Cen A SB* 14 39 36.49400 -60 50 02.3737 0.96 0.72 0.01     G2V 1111 0
10 NAME Barnard's star BY* 17 57 48.4997994034 +04 41 36.111354228 12.497 11.24 9.511 8.298 6.741 M4V 632 2
11 BD-15 6290 BY* 22 53 16.7323107416 -14 15 49.303409936 12.928 11.749 10.192 9.013 7.462 M3.5V 837 1
12 BD-15 6290c Pl 22 53 16.73352 -14 15 49.3186           ~ 166 1
13 BD-15 6290b Pl 22 53 16.73352 -14 15 49.3186           ~ 217 1

    Equat.    Gal    SGal    Ecl

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2019.12.14-22:57:12

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