J/AJ/142/176 Exoplanet host stars. II. Speckle interferometry (Mason+, 2011)
Know the star, know the planet.
II. Speckle interferometry of exoplanet host stars.
Mason B.D., Hartkopf W.I., Raghavan D., Subasavage J.P., Roberts L.C.,
Turner N.H., Ten Brummelaar T.A.
<Astron. J., 142, 176 (2011)>
=2011AJ....142..176M 2011AJ....142..176M
ADC_Keywords: Interferometry ; Stars, double and multiple ; Planets
Keywords: binaries: general - binaries: visual - stars: individual (HD 8673) -
techniques: interferometric
Abstract:
A study of the host stars to exoplanets is important for understanding
their environment. To that end, we report new speckle observations of
a sample of exoplanet host primaries. The bright exoplanet host
HD 8673 (= HIP 6702) is revealed to have a companion, although at this
time we cannot definitively establish the companion as physical or
optical. The observing lists for planet searches and for these
observations have for the most part been pre-screened for known
duplicity, so the detected binary fraction is lower than what would
otherwise be expected. Therefore, a large number of double stars were
observed contemporaneously for verification and quality control
purposes, to ensure that the lack of detection of companions for
exoplanet hosts was valid. In these additional observations, 10 pairs
are resolved for the first time and 60 pairs are confirmed.
Description:
The observations were obtained with the USNO speckle camera on the
NOAO 4m telescopes at both KPNO and CTIO from 2001 to 2010. The
instrument used for the speckle observations was the USNO speckle
interferometer, described in Mason et al. (2009, Cat. J/AJ/137/3358).
All of these observations were obtained as part of other observing
projects, for example, analysis of white, red, and subdwarfs (Jao et
al., 2009AJ....137.3800J 2009AJ....137.3800J), G dwarfs (Section 5.3.6 of Raghavan et al.
2010, J/ApJS/190/1), or massive stars (Mason et al. 2009,
J/AJ/137/3358), some of which are still in developmental and/or data
collection stages. Unpublished observations of exoplanet host stars
were extracted from these data and are presented here.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 40 129 Stars with no companion detected
table3.dat 74 550 Other pairs measured
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See also:
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2013)
J/A+AS/105/503 : Binary star speckle measurements (Balega+ 1994)
J/AJ/119/3084 : ICCD speckle obs. of binary stars. XXIII. (Hartkopf+, 2000)
J/AJ/121/3224 : Speckle interferometry of HIP binaries (Mason+, 2001)
J/A+A/367/865 : Speckle observations of binary systems (Prieur+ 2001)
J/A+A/385/87 : Speckle interferometry of multiple stars (Balega+, 2002)
J/ApJ/646/523 : Exoplanet systems with stellar companions (Raghavan+, 2006)
J/ApJ/680/728 : Diameters of exoplanet host stars (Baines+, 2008)
J/ApJ/694/1085 : Radii of exoplanet host stars (van Belle+, 2009)
J/AJ/137/3358 : Speckle interferometry of massive stars (Mason+, 2009)
J/ApJS/190/1 : A survey of stellar families (Raghavan+, 2010)
J/AJ/139/743 : Speckle interferometry in 2008-09 (Tokovinin+, 2010)
J/AJ/142/46 : Speckle interferometry at USNO. XVII. (Mason+, 2011)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP [522/116906] Hipparcos star identifier
8- 14 A7 --- HD HD catalog number
16- 28 A13 --- OName Other common designations
30- 38 F9.4 yr Epoch [2001/2010.1] Epoch of observation;
Besselian year (minus 2000)
40 A1 --- Tel Telescope: C=Cerro Tolodo 4m, K=Kitt Peak 4m
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS WDS designation (HHMMm+DDMM ; J2000) (1)
12- 19 A8 --- Disc Discoverer code as in Cat B/wds
21- 25 A5 --- Comp System components
27- 32 I6 --- HIP [190/118205]? Hipparcos identifier
34- 42 F9.4 yr Epoch [2001.01/2010.60] Epoch of Observation;
Besselian year
44- 48 F5.1 deg PA [0/359.6] Position angle
49 A1 --- u_PA Uncertainty flag on PA
51- 55 F5.3 arcsec Sep [0.042/5.426] Separation
56 A1 --- u_Sep Uncertainty flag on Sep
58- 74 A17 --- Note Note(s) (2)
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Note (1): Washington Double Star Catalog (Mason et al. 2001, Cat. B/wds)
identifier, based on arcminute-precision J2000 coordinates.
6 names corrected at CDS, see the "History" section below
Note (2): Note as follows:
1 = Confirming observation.
2 = Two measurements are averaged to give this mean position.
3 = Calibration system.
4 = Previously known as RST3558a.
5 = Confirmed with HRCam on SOAR 4.2m, CTIO 4m (Tokovinin et al. 2010,
Cat. J/AJ/139/743).
6 = Three measurements are averaged to give this mean position.
7 = First measure of newly resolved pair. Primary is HD 341480.
8 = Confirming observation or more likely a new component.
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History:
* 22-Mar-2013: From electronic version of the journal
* 09-Apr-2013: WDS designations corrected in table3.dat:
WDS J04503+0103 corrected into J04505+0103
WDS J13147-6355 corrected into J13147-6335
WDS J21268+3732 corrected into J21268+3731
WDS J21373+6604 corrected into J21372+6604
WDS J23277-1502 corrected into J23227-1502
WDS J18579+4215 corrected into J18579+4214 (=COU1795)
References:
Roberts et al. Paper I 2011AJ....142..175R 2011AJ....142..175R
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 15-Mar-2013