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J/A+A/384/491 Fast-rotating nearby solar-type stars. I. (Cutispoto+, 2002)
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Fast-rotating nearby solar-type stars.
I. Spectral classification, vsini, Li abundances and X-ray luminosities
Cutispoto G., Pastori L., Pasquini L., de Medeiros J.R., Tagliaferri G.,
Andersen J.
<Astron. Astrophys. 384, 491 (2002)>
=2002A&A...384..491C (SIMBAD/NED BibCode)
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ADC_Keywords: Stars, nearby ; Stars, G-type ; Photometry, UBVRI ; Abundances ;
Radial velocities ; Rotational velocities ; Equivalent widths
Keywords: stars: abundances - stars: activity - stars: fundamental parameters -
stars: variables: general - X-rays: stars
Abstract:
We present the results of high-resolution spectroscopic and
high-precision photometric observations on a sample of 129 late-F and
G-type nearby stars selected on the basis of their large rotational
velocity. Using also data from the Hipparcos satellite, CORAVEL and
from the ROSAT satellite database, we infer spectral types, compute
radial velocities, vsini, Li abundances and X-ray luminosities and
investigate the single or binary nature of the sample stars. Such a
careful analysis of our sample shows a large fraction of binaries
(~62%) and of young single disk stars. In particular, at least 9 stars
can be considered bona-fide PMS or ZAMS objects, and 30 stars are
identified as SBs for the first time. Information on the presence of
Ca II K emission and on optical variability is given for some of the
stars of the sample.
The photometry has been obtained at the European Southern Observatory
(ESO-La silla, Chile) during several observing runs (19/11-03/12 1993,
24/11-04/12 1994, 15-28/01/1995 and 1-12/10/1995), by using the 50cm
ESO telescope.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 102 173 Summary of stellar data
table3.dat 102 25 Summary of stellar data for stars excluded from
the analysis
table4.dat 37 90 UBV(RI)c photometry from La Silla
table5.dat 36 304 Radial velocity determinations
notes.dat 80 403 Individual notes
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See also:
J/A+AS/138/87 : UBVRI photometry of EUV stellar sources (Cutispoto+ 1999)
Byte-by-byte Description of file: table1.dat table3.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [HD]
4- 9 I6 --- HD Program star HD number
10- 11 A2 --- m_HD Multiplicty index on HD
13- 17 F5.2 mag Vmag ? V magnitude
19- 21 A3 --- Bin Binarity flag (VB or SB)
23- 37 A15 --- SpType Inferred spectral type (1)
39- 44 F6.1 pc Dist ? Trigonometric or photometric distance
45 A1 --- u_Dist Uncertainty flag on Dist
47- 51 F5.2 mag VMAG ? Absolute V magnitude
52 A1 --- u_VMAG Uncertainty flag on VMAG (1)
54- 56 I3 km/s vsini ? vsini from our spectra
57 A1 --- u_vsini Uncertainty flag on vsini (1)
58 A1 --- n_vsini [b] b: blended (2)
59 A1 --- --- [+] If two vsini for binaries
60- 61 I2 km/s vsini2 ? Second vsini value from our spectra
for binaries
62 A1 --- u_vsini2 [:?] Uncertainty flag on vsini2, or
? for unknown (1)
64- 66 I3 km/s vsiniCO ? vsini from the CORAVEL database
67 A1 --- u_vsiniCO Uncertainty flag on vsiniCO (1)
68 A1 --- n_vsiniCO [b] b: blended (2)
69 A1 --- --- [+] If two vsini for binaries
70- 71 I2 km/s vsini2CO ? Second vsini value from the CORAVEL database
72 A1 --- u_vsini2CO [:?] Uncertainty flag on vsini2CO, or
? for unknown (1)
74 A1 --- l_EWLi Limit flag on EWLi
75- 77 I3 0.1pm EWLi ? Li line equivalent width in milli-Angstrom
78 A1 --- --- [+] If two equivalent width for binaries
79 A1 --- l_EWLi2 Limit flag on EWLi2
80- 82 I3 0.1pm EWLi2 ? Second Li line equivalent width for binaries
84 A1 --- l_ALi Limit flag on ALi
85- 88 F4.1 --- ALi ? Li abundance (H abundance = 12)
89 A1 --- n_ALi [*] *: Abundance computed in LTE
90 A1 --- --- [+] If two abundances for binaries
91 A1 --- l_ALi2 Limit flag on ALi2
92- 94 F3.1 --- ALi2 ? Second Li abundance for binaries
(H abundance = 12)
95 A1 --- n_ALi2 [*] *: Abundance computed in LTE
97-100 F4.1 [10-7W] LX ? log of the X-ray luminosity in the
0.2-2.6keV band
102 A1 --- Note [*] *: Note in notes.dat file
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Note (1): Errors uncertainties:
SpType : ":" denotes errors up to several spectral subclasses
VMAG: ":" denotes values computed from the photometric parallax
vsini: errors are of the order of +/-1km/s,
the symbol ":" denotes errors up to +/-3km/s;
Note (2): The symbol "b" denotes blended values for those VB or SB2 or SB3
systems for which it was not possible to separate the contribution
of the individual components
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [HD]
4- 9 I6 --- HD Program star HD number
10- 11 A2 --- m_HD Multiplicty index on HD
13- 16 F4.2 mag Vmag V magnitude
18- 21 F4.2 mag U-B U-B colour index
22 A1 --- n_U-B Uncertainty flag on U-B
24- 27 F4.2 mag B-V B-V colour index
29- 32 F4.2 mag V-R V-R Cousins colour index
34- 37 F4.2 mag R-I R-I Cousins colour index
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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- 2 A2 --- --- [HD]
4- 9 I6 --- HD HD number
10- 11 A2 --- m_HD Multiplicity index on HD (1)
13- 22 A10 "DD/MM/YYYY" Date Observation date
24- 28 F5.1 km/s RV Radial velocity
30- 33 F4.1 km/s e_RV rms uncertainty on RV
35- 36 A2 --- Line [Ca Li] Spectral region from which the RV
was computed (2)
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Note (1): The components of VBs and the components of SBs are indicated with
capitals and lower case letters, respectively.
Note (2): Spectral regions:
Ca: Ca IIK, centered at 3938.5{AA}
Li: Li I, centered at 6705.5{AA}
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD number
8- 80 A73 --- Note Text of the note
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Acknowledgements: Giuseppe Cutispoto <gcutispoto@ct.astro.it>
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(End) Patricia Bauer [CDS] 11-Mar-2002