J/AJ/129/2294 Radial velocities of weak-lines T Tauri stars (Massarotti+, 2005)
A search for substellar companions around 15 weak-lined T Tauri stars with the
Planetary Camera 2 of the Hubble Space Telescope.
Massarotti A., Latham D.W., Torres G., Brown R.A., Oppenheimer B.D.
<Astron. J., 129, 2294-2307 (2005)>
=2005AJ....129.2294M 2005AJ....129.2294M
ADC_Keywords: Binaries, spectroscopic ; Stars, dwarfs ;
Stars, pre-main sequence ; Radial velocities
Keywords: binaries: spectroscopic - planetary systems - stars: imaging -
stars: low-mass, brown dwarfs - stars: pre-main-sequence
Abstract:
To search for thermal emission from substellar companions, we have
obtained Z-band images of 15 weak-lined T Tauri stars in the
Taurus-Auriga and Ophiuchus star-forming regions using the Planetary
Camera 2 on the Hubble Space Telescope. To complement the imaging
program, extensive spectroscopic observations were obtained with the
Center for Astrophysics Digital Speedometers.
Description:
Three nearly identical echelle spectrographs have been used on the MMT
and 1.5m Tillinghast Reflector at the F. L. Whipple Observatory atop
Mount Hopkins, Arizona, and on the 1.5m Wyeth Reflector located at the
Oak Ridge Observatory in the town of Harvard, Massachusetts. For our
HST observations with the PC2 we chose the near-infrared
intermediate-band filter W1042 (Z band).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 87 17 Target weak-lined T Tauri stars
table5.dat 63 307 Radial velocities
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See also:
J/ApJS/101/117 : UBVRIJHKLMNQ photometry in Taurus-Auriga (Kenyon+ 1995)
J/A+A/372/173 : ISOCAM observations of the rho Ophiuchi cloud
(Bontemps+, 2001)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name T Tauri star name
10 A1 --- m_Name Multiplicity index on Name
12- 13 I2 h RAh Hour of Right Ascension (J2000.0)
15- 16 I2 min RAm Minute of Right Ascension (J2000.0)
18- 22 F5.2 s RAs Second of Right Ascension (J2000.0)
24 A1 --- DE- Sign of the Declination (J2000.0)
25- 26 I2 deg DEd Degree of Declination (J2000.0)
28- 29 I2 arcmin DEm Arcminute of Declination (J2000.0)
31- 34 F4.1 arcsec DEs Arcsecond of Declination (J2000.0)
36- 40 F5.2 mag Vmag ? V band magnitude
42- 45 F4.2 mag B-V ? B-V color index
47- 50 F4.2 mag K-L ? K-L color index
52- 57 F6.2 --- EW(Ha) ? Hα equivalent width
59- 62 F4.2 mag AZ ? Extinction in the Z band (1)
64- 65 A2 --- SpType MK spectral type
67- 70 F4.2 [K] log(Teff) Effective temperature
72- 76 F5.2 [solLum] log(L) Luminosity
78- 87 A10 --- Ref References (2)
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Note (1): Extinction in the Z band (HST W1042 filter), AZ, were derived from
published J-band extinction estimates when available and from V-band
estimates otherwise, using the mean extinction curve reported by
Fitzpatrick (1999PASP..111...63F 1999PASP..111...63F).
Note (2): References, defined as follows:
2 = Kenyon & Hartmann (1995, Cat. J/ApJS/101/117)
3 = Jones & Herbig (1979AJ.....84.1872J 1979AJ.....84.1872J)
4 = Simon et al. (1995ApJ...443..625S 1995ApJ...443..625S)
5 = Walter et al. (1994AJ....107..692W 1994AJ....107..692W)
6 = Chen et al. (1995ApJ...445..377C 1995ApJ...445..377C)
7 = Nuernberger et al. (1998A&A...330..549N 1998A&A...330..549N)
8 = Bouvier & Appenzeller (1992A&AS...92..481B 1992A&AS...92..481B)
9 = Bontemps et al. (2001, Cat. J/A+A/372/173)
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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- 9 A9 --- Name T-Tauri star name
11- 12 I2 h RAh Hour of Right Ascension (J2000)
14- 15 I2 min RAm Minute of Right Ascension (J2000)
17- 20 F4.1 s RAs Second of Right Ascension (J2000)
22 A1 --- DE- Sign of the Declination (J2000)
23- 24 I2 deg DEd Degree of Declination (J2000)
26- 27 I2 arcmin DEm Arcminute of Declination (J2000)
29- 30 I2 arcsec DEs Arcsecond of Declination (J2000)
32 A1 --- Tel Telescope code (1)
34- 45 F12.4 d HJD Heliocentric Julian Date of observation
47- 52 F6.2 km/s RV Radial velocity
54- 57 F4.2 km/s e_RV ? Error in RV
59- 63 F5.2 km/s RV2 ? Secondary component radial velocity
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Note (1): Telescope code, defined as follows:
T = 1.5-m Tillinghast Reflector;
M = Multiple Mirror Telescope;
W = 1.5-m Wyeth Reflector.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 13-Sep-2006