2014A&A...567A.128P


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST19:00:01

2014A&A...567A.128P - Astronomy and Astrophysics, volume 567A, 128-128 (2014/7-1)

No X-rays from WASP-18. Implications for its age, activity, and the influence of its massive hot Jupiter.

PILLITTERI I., WOLK S.J., SCIORTINO S. and ANTOCI V.

Abstract (from CDS):

About 20% of the >1000 known exoplanets are Jupiter analogs orbiting very close to their parent stars. It is still under debate to what detectable level such hot Jupiters possibly affect the activity of the host stars through tidal or magnetic star-planet interaction. In this paper we report on an 87ks Chandra observation of the hot Jupiter hosting star WASP-18. This system is composed of an F6 type star and a hot Jupiter of mass 10.4MJup orbiting in less than 20hr around the parent star. On the basis of an isochrone fitting, WASP-18 is thought to be 600Myr old and within the range of uncertainty of 0.5-2Gyr. The star is not detected in X-rays down to a luminosity limit of 4x1026erg/s, which is more than two orders of magnitude lower than expected for a star of this age and mass. This value proves an unusual lack of activity for a star with an estimated age around 600Myr. We argue that the massive planet can play a crucial role in disrupting the stellar magnetic dynamo created within its thin convective layers. Other additional 212 X-ray sources are detected in the Chandra image. We list them and briefly discuss their nature.

Abstract Copyright:

Journal keyword(s): stars: activity - stars: coronae - stars: individual: WASP-18

VizieR on-line data: <Available at CDS (J/A+A/567/A128): table2.dat>

Status at CDS:   All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 25

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Number of rows : 25

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 HD 10069 * 01 37 25.0335097438 -45 40 40.376513381   9.74 9.30     F6IV/V 153 1
2 HD 10069b Pl 01 37 25.0335097438 -45 40 40.376513381           ~ 212 1
3 HD 10210 * 01 38 58.4088912726 -45 46 29.467479741   9.02 8.08     G8III/IV 14 0
4 BD+57 793 * 04 21 52.7044170433 +57 49 01.892074012   10.27 9.85     F5V 130 2
5 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2654 0
6 WASP-12 ** 06 30 32.7966788910 +29 40 20.266334158   12.14 11.57     G0V 229 2
7 HAT-P-9 * 07 20 40.4562402899 +37 08 26.342807726   12.35 12.34 12.08   F 44 1
8 * alf CMi SB* 07 39 18.11950 +05 13 29.9552 0.82 0.79 0.37 -0.05 -0.28 F5IV-V+DQZ 1758 0
9 NGC 2682 OpC 08 51 18 +11 48.0           ~ 2032 0
10 WASP-19 LP* 09 53 40.0764883458 -45 39 33.055979403   13.05 12.31 12.12 11.35 G8V 132 1
11 V* R Mus cC* 12 42 05.0256100705 -69 24 27.196561465 7.65 7.11 6.33   5.499 F7Ib 143 0
12 HD 110450 * 12 43 07.5284469299 -69 32 44.503022506   9.21 8.74     F6V 18 0
13 [MMN2007] A1 gLS 14 17 35.9 +52 26 46     21.53   19.69 ~ 76 0
14 BD+22 2716 * 14 33 06.3573673505 +21 53 40.982782397   10.194 9.745     F5V 80 1
15 CD-27 10695 * 15 59 50.9489706053 -28 03 42.309432433   11.83 11.59 11.31 10.92 F4 92 1
16 HD 147506 * 16 20 36.3579144486 +41 02 53.109043943   9.15 8.69     F8V 139 2
17 BD+38 2917 * 17 20 27.8782981532 +38 14 31.909663582   10.41 9.99     F5V 47 1
18 Kepler-8 Ro* 18 45 09.1489711922 +42 27 03.891516422           F6V 89 1
19 HD 179949 BY* 19 15 33.2300861317 -24 10 45.673372382   6.772 6.237     F8V 350 1
20 CoRoT-2 * 19 27 06.4944821296 +01 23 01.357597206   13.422 12.568 12.204 11.49 G7V+K9V 211 2
21 BD+47 2846 Er* 19 28 59.3538131541 +47 58 10.216250846   10.97 10.48     F6V 254 2
22 Kepler-5 Ro* 19 57 37.6884816070 +44 02 06.189528905           F5V 87 1
23 HD 189733 BY* 20 00 43.7130382888 +22 42 39.071811263 9.241 8.578 7.648 7.126 6.68 K2V 720 1
24 HD 189733b Pl 20 00 43.7130382888 +22 42 39.071811263           ~ 1082 1
25 BD+41 4831 * 23 39 05.8101319829 +42 27 57.503480354   10.88 10.47     F8V 70 1

    Equat.    Gal    SGal    Ecl

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2020.07.14-19:00:01

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