J/AJ/160/84 Depth-of-search & completeness for 213 exoplanets (Gascon+, 2020)
Analytic stability maps of unknown exoplanet companions for imaging
prioritization.
Gascon C., Savransky D., Sureda M.
<Astron. J., 160, 84 (2020)>
=2020AJ....160...84G 2020AJ....160...84G
ADC_Keywords: Exoplanets; Stars, high-velocity
Keywords: Astronomical simulations ; Coronographic imaging ; Direct imaging ;
Exoplanet dynamics
Abstract:
Identifying which systems are more likely to host an imageable planet
can play an important role in the construction of an optimized target
list for future direct imaging missions, such as the planned
Coronagraph Instrument (CGI) technology demonstration for the Nancy
Grace Roman Space Telescope. For single-planet systems, the presence
of an already detected exoplanet can severely restrict the target's
stable region and should therefore be considered when searching for
unknown companions. To do so, we first analyze the performance and
robustness of several two-planet stability criteria by comparing them
with long-term numerical simulations. We then derive the necessary
formulation for the computation of (a, R) analytic stability maps,
which can be used in conjunction with depth-of-search grids in order
to define the stable-imageable region of a system. The dynamically
stable completeness (i.e., the expected number of imageable and stable
planets) can then be calculated via convolution with the selected
occurrence grid, obtaining a metric that can be directly compared for
imaging prioritization. Applying this procedure to all the currently
known single-planet systems within a distance of 50pc, we construct a
ranked target list based on the CGI's predicted performance and SAG13
occurrence rates. Finally, we evaluate the importance of considering
the radial velocity data from past Doppler surveys in order to rule
out entire regions of our parameter space where, if a planet existed,
it would have certainly been detected by previous RV observations.
Description:
We apply the procedure explained in section 5 to all 213 currently
known single-planet systems within a distance of 50pc, creating a
ranking based on Petrovich's (2015ApJ...808..120P 2015ApJ...808..120P) stability criterion
and complemented by the results obtained with Giuppone's
(2013MNRAS.436.3547G 2013MNRAS.436.3547G) and the Hill angular momentum deficit (AMD)
criteria.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 102 213 Dynamically stable depth-of-search and completeness
values
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See also:
J/ApJ/834/17 : Mass & radius of planets, moons, low mass stars (Chen+, 2017)
J/A+A/605/A72 : Planetary systems AMD-stability (Laskar+, 2017)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 27 A27 --- Name Target name (1)
29- 33 F5.2 pc Dist [1.3/49.9] Target distance
35- 42 F8.3 AU a [0.01/2500] Known planet semi-major axis
44- 48 F5.3 --- e [0/0.95] Known planet eccentricity
50- 50 A1 --- f_e [a] Flag on e (2)
52- 57 F6.3 Mjup msini [0.004/30] Known planet minimum mass
59- 59 A1 --- f_msini [b] Flag on msini (3)
61- 65 F5.2 --- DoSP [0/62.3] Stable Depth-of-search calculated
with Petrovich's criterion
67- 73 F7.5 --- CompP [0/0.41] Stable Completeness calculated with
Petrovich's criterion
75- 79 F5.2 --- DoSG [0/62.4] Stable Depth-of-search calculated
with Giuppone's criterion
81- 87 F7.5 --- CompG [0/0.42] Stable Completeness calculated with
Giuppone's criterion
89- 93 F5.2 --- DoSH [0/60.6] Stable Depth-of-search calculated
with the Hill AMD criterion
95-102 F8.6 --- CompH [0/0.4] Stable Completeness calculated with
the Hill AMD criterion
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Note (1): Results are obtained for 213 single-planet systems using Petrovich's,
Hill AMD and Giuppone's criteria. In particular, the systems are
ranked according to the completeness values calculated with
Petrovich's criterion.
Note (2): Flag as follows:
a = The eccentricity of this target's planet was unknown and
consequently set to zero (12 occurrences).
Note (3): Flag as follows:
b = This system's inclination was known and therefore the given value
corresponds to the true mass m (8 occurrences).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 07-Dec-2020