J/A+A/504/829 Spectroscopic survey of youngest field stars (Guillout+, 2009)
A spectroscopic survey of the youngest field stars in the solar neighbourhood.
I. The optically bright sample.
Guillout P., Klutsch A., Frasca A., Freire Ferrero R., Marilli E.,
Mignemi G., Biazzo K., Bouvier J., Monier R., Motch C., Sterzik M.
<Astron. Astrophys., 504, 829-843 (2009)>
=2009A&A...504..829G 2009A&A...504..829G
ADC_Keywords: Stars, nearby ; Stars, pre-main sequence ; X-ray sources ;
Radial velocities
Keywords: stars: formation - stars: rotation - stars: kinematics -
stars: pre-main sequence - stars: binaries: close - X-rays: stars
Abstract:
We present the first results of an ambitious ground-based observation
programme conducted on 1-4m class telescopes. Our sample consists
of 1097 active and presumably young stars, all of them being optical
(Tycho Catalogue) counterparts of ROSAT All- Sky Survey X-ray sources
in the northern hemisphere. In this paper, we concentrate on the
optically brightest (VT≤9.5m) candidates (704 objects).We acquired
high-resolution optical spectroscopy in the Hα and/or lithium
spectral regions for 426 of such stars without relevant data in the
literature. We describe the star sample and the observations and we
start to discuss the physical properties of the investigated stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
cbssb1.dat 159 59 Catalog of bright RasTyc sample stars identified
as SB1 systems
cbssb2-3.dat 130 119 Catalog of bright RasTyc sample stars identified
as SB2 or SB3 systems
cbssing.dat 159 313 Catalog of bright RasTyc sample stars identified
as simple single or not classified sources
crvsb1.dat 110 59 Radial velocity measurements obtained on the two
observation nights for SB1 systems
crvsb2-3.dat 162 54 Radial velocity measurements obtained on the two
observation nights for SB2 and SB3 systems
crvsing.dat 122 313 Radial velocity measurements obtained on the two
observation nights for single or not
classified sources
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See also:
J/A+A/454/301 : Radial velocities of 6 binaries (Frasca+, 2006)
J/A+A/490/737 : Radial velocities of 3 RasTyc new triple system (Klutsch+ 2008)
Byte-by-byte Description of file: cbss*.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- --- [RasTyc]
7- 15 A9 --- RasTyc RasTyc name (HHMM+DDMM)
17- 37 A21 --- Name Star Name
39- 40 I2 h RAh Right ascension (J2000)
42- 43 I2 min RAm Right ascension (J2000)
45- 48 F4.1 s RAs Right ascension (J2000)
50 A1 --- DE- Declination sign (J2000)
51- 52 I2 deg DEd Declination (J2000)
54- 55 I2 arcmin DEm Declination (J2000)
57- 58 I2 arcsec DEs Declination (J2000)
60- 64 F5.3 mag B-V B-V colour index
66- 72 F7.3 10-2ct/s CR ? ROSAT X-ray count rate
74- 79 F6.3 10-2ct/s e_CR ? rms uncertainty on CR
81- 84 A4 --- SB SB type (1)
86 A1 --- m_RasTyc [ABC] Multiplicity index
88 A1 --- l_vsini Limit flag on vsini
89- 94 F6.2 km/s vsini ? Rotational velocity
96-100 F5.2 km/s e_vsini ? rms uncertainty on vsini
102-105 I4 K Teff ? Effective temperature
107-109 I3 K e_Teff ? rms uncertainty on Teff
111-114 F4.2 [cm/s2] logg ? Surface gravity
116-119 F4.2 [cm/s2] e_logg ? rms uncertainty on logg
121-125 F5.2 [-] [Fe/H] ? Metallicity
127-130 F4.2 [-] e_[Fe/H] ? rms uncertainty on [Fe/H]
132-138 F7.2 0.1pm WHa ? Hα emission line width
140-145 F6.2 0.1pm e_WHa ? rms uncertainty on WHa
147-152 F6.2 0.1pm EW(Li) ? Lithium equivalent width
154-159 F6.2 0.1pm e_EW(Li) ? rms uncertainty on EW(Li)
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Note (1): SB type as follows:
SB1 = SB1 type
SB1? = possible SB1 type
SB2 = SB2 type
SB2? = possible SB2 type
SB3 = SB3 type
SB3? = possible SB3 type
S: = single star with only one observation
S = single star
? = problem during the classification
- = star not observed
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Byte-by-byte Description of file: crvsb1.dat crvsing.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- --- [RasTyc]
7- 15 A9 --- RasTyc RasTyc name (HHMM+DDMM)
17- 37 A21 --- Name Name
39- 40 I2 h RAh Right ascension (J2000)
42- 43 I2 min RAm Right ascension (J2000)
45- 48 F4.1 s RAs Right ascension (J2000)
50 A1 --- DE- Declination sign (J2000)
51- 52 I2 deg DEd Declination (J2000)
54- 55 I2 arcmin DEm Declination (J2000)
57- 58 I2 arcsec DEs Declination (J2000)
60- 72 F13.5 d HJD1 ? Heliocentric Julian date on first observation
74- 79 F6.2 km/s RV1 ? Radial velocity of first observation
81- 84 F4.2 km/s e_RV1 ? rms uncertainty on RV1
86- 98 F13.5 d HJD2 ? Heliocentric Julian date on second observation
100-105 F6.2 km/s RV2 ? Radial velocity of second observation
107-110 F4.2 km/s e_RV2 ? rms uncertainty on RV2
112-117 F6.2 km/s RVm ? Mean radial velocity (for crvsing table only)
119-122 F4.2 km/s e_RVm ? rms uncertainty on RVm
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Byte-by-byte Description of file: crvsb2-3.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- --- [RasTyc]
7- 15 A9 --- RasTyc RasTyc name (HHMM+DDMM)
17- 37 A21 --- Name Name
39- 40 I2 h RAh Right ascension (J2000)
42- 43 I2 min RAm Right ascension (J2000)
45- 48 F4.1 s RAs Right ascension (J2000)
50 A1 --- DE- Declination sign (J2000)
51- 52 I2 deg DEd Declination (J2000)
54- 55 I2 arcmin DEm Declination (J2000)
57- 58 I2 arcsec DEs Declination (J2000)
60- 72 F13.5 d HJD1 ? Heliocentric Julian date on first observation
74- 80 F7.2 km/s RV1-1 ? Radial velocity of first identified component
on first observation
82- 86 F5.2 km/s e_RV1-1 ? rms uncertainty on RV1
88- 94 F7.2 km/s RV2-1 ? Radial velocity of second identified component
on first observation
96-100 F5.2 km/s e_RV2-1 ? rms uncertainty on RV1
102-107 F6.2 km/s RV3-1 ? Radial velocity of third identified component
on first observation
109-112 F4.2 km/s e_RV3-1 ? rms uncertainty on RV1
114-126 F13.5 d HJD2 ? Heliocentric Julian date on second observation
128-133 F6.2 km/s RV1-2 ? Radial velocity of first identified component
on second observation
135-138 F4.2 km/s e_RV1-2 ? rms uncertainty on RV2
140-145 F6.2 km/s RV2-2 ? Radial velocity of second identified component
on second observation
147-150 F4.2 km/s e_RV2-2 ? rms uncertainty on RV2
152-157 F6.2 km/s RV3-2 ? Radial velocity of third identified component
on second observation
159-162 F4.2 km/s e_RV3-2 ? rms uncertainty on RV2
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Acknowledgements:
Alexis Klutsch, klutsch.alexis(at)gmail.com
History:
11-Jan-2010: units of WHa and EW(Li) corrected into 0.1pm
(End) Patricia Vannier [CDS] 09-Oct-2009