J/ApJ/670/1367 Gemini Deep Planet Survey (Lafreniere+, 2007)
The Gemini Deep Planet Survey.
Lafreniere D., Doyon R., Marois C., Nadeau D., Oppenheimer B.R.,
Roche P.F., Rigaut F., Graham J.R., Jayawardhana R., Johnstone D.,
Kalas P.G., Macintosh B., Racine R.
<Astrophys. J., 670, 1367-1390 (2007)>
=2007ApJ...670.1367L 2007ApJ...670.1367L
ADC_Keywords: Surveys ; Stars, double and multiple ; Planets
Keywords: binaries: close - planetary systems - stars: imaging -
stars: low-mass, brown dwarfs
Abstract:
We present the results of the Gemini Deep Planet Survey, a
near-infrared adaptive optics search for giant planets and brown
dwarfs around 85 nearby young stars. The observations were obtained
with the Altair adaptive optics system at the Gemini North telescope,
and angular differential imaging was used to suppress the speckle
noise of the central star. Typically, the observations are sensitive
to angular separations beyond 0.5" with 5σ contrast
sensitivities in magnitude difference at 1.6um of 9.5 at 0.5", 12.9 at
1", 15.0 at 2", and 16.5 at 5". These sensitivities are sufficient to
detect planets more massive than 2M{Jup} with a projected separation
in the range 40-200AU around a typical target. Second-epoch
observations of 48 stars with candidates (out of 54) have confirmed
that all candidates are unrelated background stars. A detailed
statistical analysis of the survey results is presented.
Description:
All observations were obtained at the Gemini North telescope with the
Altair AO system.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 158 85 Gemini Deep Planet Survey (GDPS) target sample
refs.dat 79 50 References
table5.dat 40 308 Point sources detected
table7.dat 65 80 Planet detection probability
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Star identification
13- 14 I2 h RAh Right ascension (J2000)
16- 17 I2 min RAm Right ascension (J2000)
19- 23 F5.2 s RAs Right ascension (J2000)
25 A1 --- DE- Declination sign (J2000)
26- 27 I2 deg DEd Declination (J2000)
29- 30 I2 arcmin DEm Declination (J2000)
32- 35 F4.1 arcsec DEs Declination (J2000)
37- 42 A6 --- SpType MK spectral type
44- 47 F4.2 mag Hmag H magnitude
49- 52 F4.1 pc Dist Heliocentric distance
53 A1 ---- r_Dist [bce] Reference for distance if not HIP (I/239),
in refs.dat file
54- 59 F6.1 mas/yr pmRA Proper motion along RA (pmRA*cosDE)
60 A1 ---- r_pmRA [bcde] Reference for pmRA if not HIP (I/239),
in refs.dat file
61- 67 F7.1 mas/yr pmDE Proper motion along DE
68 A1 ---- r_pmDE [bcde] Reference for proper motions if not
HIP (I/239), in refs.dat file
69- 73 F5.2 [-] [Fe/H] ? Metallicity
75- 78 A4 --- r_[Fe/H] References for [Fe/H], in refs.dat file
80- 83 I4 Myr Age.l Age interval, lower limit
84 A1 --- --- [-]
85- 88 I4 Myr Age.u Age interval, upper limit
90-112 A23 --- refAge Reference for Age, in refs.dat file
114-124 A11 --- Notes Notes
126-131 I6 --- HD ? Henry Draper catalog number
132 A1 --- m_HD Multiplicity index on HD
134-138 A5 --- GJ Gliese + Jahreiss designation (nearby stars)
140-145 I6 --- HIP ? Hipparcos number (I/239)
148-158 A11 --- OName Other name
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Ref Reference code
6- 24 A19 --- BibCode BibCode
26- 51 A26 --- Aut Author's name
53- 79 A27 --- Com Comments
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Star identification (1)
12- 20 F9.4 yr Epoch Epoch of the observation
22- 26 F5.2 arcsec Sep Separation (2)
28- 32 F5.1 deg PA Position angle (3)
34- 38 F5.2 mag Dmag Star and detected source magnitude difference (4)
40 A1 --- f_Dmag [defg] Flag on Delmag (5)
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Note (1): Target stars around which no point source was detected are
omitted from this table. Unless stated otherwise, all point sources
listed were confirmed to be background objects using data from two epochs.
Note (2): Uncertainty is 0.015 arcsec, see text for detail.
Note (3): Uncertainty is 0.2 degrees, see text for detail.
Note (4): Photometric uncertainties:
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Separation (arcsec) sigma (mag)
--------------------------------
< 4 0.07
4-7 0.12
7-10 0.15
10-13 0.26
>13 0.39
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Note (5): Notes as follows:
d = No second epoch data available
e = Source undetected in second epoch data
f = Source detected in second epoch data only
g = Previously known brown dwarf companion (Potter et al.,
2002ApJ...567L.133P 2002ApJ...567L.133P; Goto et al. 2002ApJ...567L..59G 2002ApJ...567L..59G)
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 11 A11 -- Name Star identification (last line is "Mean")
13- 17 F5.3 --- P2J25AU Detection probability of 2M{Jup} planet
at 25AU
19- 23 F5.3 --- P2J50AU Detection probability of 2M{Jup} planet
at 50AU
25- 29 F5.3 --- P2J100AU Detection probability of 2M{Jup} planet
at 100AU
31- 35 F5.3 --- P5J25AU Detection probability of 5M{Jup} planet
at 25AU
37- 41 F5.3 --- P5J50AU Detection probability of 5M{Jup} planet
at 50AU
43- 47 F5.3 --- P5J100AU Detection probability of 5M{Jup} planet
at 100AU
49- 53 F5.3 --- P10-25AU Detection probability of 0.5-13M{Jup}
beta=-1.2, gamma=-1 planet at 10-25AU
55- 59 F5.3 --- P25-50AU Detection probability of 0.5-13M{Jup}
beta=-1.2, gamma=-1 planet at 25-50AU
61- 65 F5.3 --- P50-100AU Detection probability of 0.5-13M{Jup}
beta=-1.2, gamma=-1 planet at 50-100AU
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 24-Feb-2010