2015ApJ...815....5S


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.21CEST15:48:11

2015ApJ...815....5S - Astrophys. J., 815, 5 (2015/December-2)

Detailed abundances of stars with small planets discovered by Kepler. I. The first sample.

SCHULER S.C., VAZ Z.A., KATIME SANTRICH O.J., CUNHA K., SMITH V.V., KING J.R., TESKE J.K., GHEZZI L., HOWELL S.B. and ISAACSON H.

Abstract (from CDS):

We present newly derived stellar parameters and the detailed abundances of 19 elements of seven stars with small planets discovered by NASA's Kepler Mission. Each star, save one, has at least one planet with a radius {#8804}1.6 R, suggesting a primarily rocky composition. The stellar parameters and abundances are derived from high signal-to-noise ratio, high-resolution echelle spectroscopy obtained with the 10 m Keck I telescope and High Resolution Echelle Spectrometer using standard spectroscopic techniques. The metallicities of the seven stars range from -0.32 to +0.13 dex, with an average metallicity that is subsolar, supporting previous suggestions that, unlike Jupiter-type giant planets, small planets do not form preferentially around metal-rich stars. The abundances of elements other than iron are in line with a population of Galactic disk stars, and despite our modest sample size, we find hints that the compositions of stars with small planets are similar to stars without known planets and with Neptune-size planets, but not to those of stars with giant planets. This suggests that the formation of small planets does not require exceptional host-star compositions and that small planets may be ubiquitous in the Galaxy. We compare our derived abundances (which have typical uncertainties of ≲0.04 dex) to the condensation temperature of the elements; a correlation between the two has been suggested as a possible signature of rocky planet formation. None of the stars demonstrate the putative rocky planet signature, despite at least three of the stars having rocky planets estimated to contain enough refractory material to produce the signature, if real. More detailed abundance analyses of stars known to host small planets are needed to verify our results and place ever more stringent constraints on planet formation models.

Abstract Copyright:

Journal keyword(s): planets and satellites: formation - planets and satellites: terrestrial planets - stars: abundances - stars: atmospheres

VizieR on-line data: <Available at CDS (J/ApJ/815/5): table1.dat table2.dat table9.dat table10.dat>

Simbad objects: 31

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Number of rows : 31

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 BD+57 793b Pl 04 21 52.7044170433 +57 49 01.892074012           ~ 175 1
2 BD+44 3020b Pl 18 56 14.3077765754 +44 31 05.389239372           ~ 50 1
3 BD+44 3020c Pl 18 56 14.3077765754 +44 31 05.389239372           ~ 33 1
4 BD+44 3020 Ro* 18 56 14.3077765754 +44 31 05.389239372   10.45 9.77     ~ 97 1
5 BD+44 3020d Pl 18 56 14.3077765754 +44 31 05.389239372           ~ 39 1
6 Kepler-90 EB* 18 57 44.0383590355 +49 18 18.495822926           ~ 93 0
7 HD 179070 Ro* 19 09 26.8351401260 +38 42 50.455094310   8.767 8.25 8.00   F6IV 138 1
8 HD 179070b Pl 19 09 26.8351401260 +38 42 50.455094310           ~ 48 1
9 Kepler-20 Ro* 19 10 47.5234815840 +42 20 19.299357667   13.41 12.51 12.70 11.64 G5V 127 1
10 Kepler-20e Pl 19 10 47.5234815840 +42 20 19.299357667           ~ 45 1
11 Kepler-20c Pl 19 10 47.5234815840 +42 20 19.299357667           ~ 79 1
12 Kepler-20b Pl 19 10 47.5234815840 +42 20 19.299357667           ~ 87 1
13 Kepler-20d Pl 19 10 47.5234815840 +42 20 19.299357667           ~ 57 1
14 Kepler-20f Pl 19 10 47.5234815840 +42 20 19.299357667           ~ 49 1
15 Kepler-130b Pl 19 13 48.1594248503 +40 14 43.161826542           ~ 22 0
16 Kepler-130d Pl 19 13 48.1594248503 +40 14 43.161826542           ~ 20 0
17 Kepler-130c Pl 19 13 48.1594248503 +40 14 43.161826542           ~ 28 0
18 Kepler-130 Ro* 19 13 48.1594248503 +40 14 43.161826542   12.16 11.57     G1V 55 0
19 Kepler-16 Al* 19 16 18.1759181246 +51 45 26.777781114   12.1   11.90   K7V 198 1
20 Kepler-22 PM* 19 16 52.1904191915 +47 53 03.947532134   11.5   11.70   G5 75 1
21 Kepler-22b Pl 19 16 52.1904191915 +47 53 03.947532134           ~ 75 1
22 BD+48 2893 * 19 24 07.7660110490 +49 02 24.928201112   10.73 10.08     ~ 98 1
23 BD+48 2893d Pl 19 24 07.7660110490 +49 02 24.928201112           ~ 11 1
24 BD+48 2893b Pl 19 24 07.7660110490 +49 02 24.928201112           ~ 72 1
25 BD+48 2893c Pl 19 24 07.7660110490 +49 02 24.928201112           ~ 43 1
26 Kepler-100c Pl 19 25 32.6433770205 +41 59 24.944182797           ~ 39 0
27 Kepler-100d Pl 19 25 32.6433770205 +41 59 24.944182797           ~ 35 0
28 Kepler-100 Ro* 19 25 32.6433770205 +41 59 24.944182797   11.86 11.06     ~ 86 0
29 Kepler-100b Pl 19 25 32.6433770205 +41 59 24.944182797           ~ 45 0
30 Kepler-78b Pl 19 34 58.0139307295 +44 26 53.957326851           ~ 108 1
31 * alf PsA b Pl 22 57 39.04625 -29 37 20.0533           ~ 186 1

    Equat.    Gal    SGal    Ecl

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2020.10.21-15:48:11

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