2015ApJ...799...87B


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.14CEST04:30:59

2015ApJ...799...87B - Astrophys. J., 799, 87 (2015/January-3)

Science parametrics for missions to search for earth-like exoplanets by direct imaging.

BROWN R.A.

Abstract (from CDS):

We use Nt, the number of exoplanets observed in time t, as a science metric to study direct-search missions like Terrestrial Planet Finder. In our model, N has 27 parameters, divided into three categories: 2 astronomical, 7 instrumental, and 18 science-operational. For various "27-vectors" of those parameters chosen to explore parameter space, we compute design reference missions to estimate Nt. Our treatment includes the recovery of completeness c after a search observation, for revisits, solar and antisolar avoidance, observational overhead, and follow-on spectroscopy. Our baseline 27-vector has aperture D = 16 m, inner working angle IWA = 0.039'', mission time t = 0-5 yr, occurrence probability for Earth-like exoplanets η = 0.2, and typical values for the remaining 23 parameters. For the baseline case, a typical five-year design reference mission has an input catalog of ∼4700 stars with nonzero completeness, ∼1300 unique stars observed in ∼2600 observations, of which ∼1300 are revisits, and it produces N1∼ 50 exoplanets after one year and N5∼ 130 after five years. We explore offsets from the baseline for 10 parameters. We find that N depends strongly on IWA and only weakly on D. It also depends only weakly on zodiacal light for Z < 50 zodis, end-to-end efficiency for h > 0.2, and scattered starlight for ζ < 10–10. We find that observational overheads, completeness recovery and revisits, solar and antisolar avoidance, and follow-on spectroscopy are all important factors in estimating N.

Abstract Copyright:

Journal keyword(s): instrumentation: high angular resolution - methods: statistical - planetary systems - planets and satellites: detection

Simbad objects: 21

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Number of rows : 21

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 * tau Cet PM* 01 44 04.0834226 -15 56 14.926552 4.43 4.22 3.50 2.88 2.41 G8V 1062 1
2 HD 16647 * 02 40 15.6917249670 +06 06 43.019080986   6.63 6.26     F3V: 45 0
3 * eps Eri BY* 03 32 55.8449634 -09 27 29.731165 5.19 4.61 3.73 3.00 2.54 K2V 1657 1
4 HD 27019 ** 04 14 09.68394 -46 07 56.7806   7.348 6.792     F8/G0V 51 1
5 * omi02 Eri Fl* 04 15 16.3197260 -07 39 10.338087 5.69 5.25 4.43 3.74 3.29 K0V 730 0
6 * 55 Tau ** 04 19 54.85720 +16 31 21.3283   7.401 6.853     F8V 227 0
7 * alf Men PM* 06 10 14.4741194137 -74 45 10.963587125   5.81 5.09     G7V 241 1
8 HD 103026 PM* 11 51 41.6083571165 -30 50 05.303882190   6.41 5.85     F9V 58 0
9 HD 119850 Fl* 13 45 43.7754528655 +14 53 29.473195472 10.989 9.894 8.50 7.465 6.363 M2V 278 0
10 * alf Cen B PM* 14 39 35.06311 -60 50 15.0992 2.89 2.21 1.33     K1V 863 1
11 HD 160933 PM* 17 36 40.0076252402 +69 34 14.778898265   7.00   6.0   F9IV-V 80 0
12 HD 159964 PM* 17 44 19.75554 -72 13 15.3204   6.999 6.526     F7V 32 1
13 * 70 Oph BY* 18 05 27.28518 +02 30 00.3558 5.40 4.89 4.03 3.38 2.92 K0-V 601 1
14 * sig Dra PM* 19 32 21.5902990 +69 39 40.234737 5.860 5.460 4.680 4.04 3.63 K0V 569 0
15 HD 191408 PM* 20 11 11.9384853308 -36 06 04.353559455   5.44 5.32     K2.5V 242 1
16 HD 191408B PM* 20 11 12.2 -36 06 09           M3.5 222 1
17 HD 191849 PM* 20 13 53.3963903475 -45 09 50.473460317 10.627 9.419 7.966 7.053 6.124 M0V 136 0
18 HD 196885 PM* 20 39 51.8753142885 +11 14 58.702911143   6.92 6.385 6.32   F8V 151 1
19 * 61 Cyg A BY* 21 06 53.9396100677 +38 44 57.897024357 7.50 6.39 5.21 4.19 3.54 K5V 927 0
20 * 61 Cyg B Fl* 21 06 55.2640651855 +38 44 31.362140913 8.63 7.40 6.03 4.86 3.55 K7V 656 1
21 HD 219420 SB* 23 15 40.2785568724 +01 18 29.866874757   7.26   6.4   F7V 40 0

    Equat.    Gal    SGal    Ecl

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2019.10.14-04:30:59

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