J/AJ/133/2524 Spectra of young nearby stars (White+, 2007)
High-dispersion optical spectra of nearby stars younger than the Sun.
White R.J., Gabor J.M., Hillenbrand L.A.
<Astron. J., 133, 2524-2536 (2007)>
=2007AJ....133.2524W 2007AJ....133.2524W
ADC_Keywords: Spectroscopy ; Stars, pre-main sequence ; YSOs ; Stars, nearby
Keywords: stars: activity - stars: fundamental parameters
stars: pre-main sequence
Abstract:
We present high-dispersion (R∼16000) optical (3900-8700Å)
spectra of 390 stars obtained with the Palomar 60inch telescope. The
majority of stars observed are part of the Spitzer Legacy Science
Program "The Formation and Evolution of Planetary Systems." Through
detailed analysis we determine stellar properties for this sample,
including radial and rotational velocities, LiIλ6708 and
Hα equivalent widths, the chromospheric activity index R'HK,
and temperature- and gravity-sensitive line ratios. Several
spectroscopic binaries are also identified. From our tabulations, we
illustrate basic age- and rotation-related correlations among measured
indices. One novel result is that CaII chromospheric emission appears
to saturate at vsini values above ∼30km/s, similar to the
well-established saturation of X-rays that originate in the spatially
separate coronal region.
Description:
Spectroscopic observations were obtained on nine observing runs
between 2001 July and 2003 June with the Palomar 60inch (1.5m)
telescope and facility spectrograph in its echelle mode.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 206 474 Spectroscopic properties of observed
single-lined stars
table2.dat 111 11 Observed Double-Lined Binary Stars
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
J/A+A/384/491 : Fast-rotating nearby solar-type stars. I (Cutispoto+, 2002-03)
J/A+A/468/663 : Li abundances in solar-analog stars (Takeda+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- HD The HD identification number
8- 13 I6 --- HIP ? Hipparcos identification number
15- 37 A23 --- OName Other identification
39- 45 A7 --- Assoc Group source is associated with
47- 48 I2 h RAh Hour of Right Ascension (J2000) (G1)
50- 51 I2 min RAm Minute of Right Ascension (J2000) (G1)
53- 57 F5.2 s RAs Second of Right Ascension (J2000) (G1)
59 A1 --- DE- Sign of the Declination (J2000) (G1)
60- 61 I2 deg DEd Degree of Declination (J2000) (G1)
63- 64 I2 arcmin DEm Arcminute of Declination (J2000) (G1)
66- 69 F4.1 arcsec DEs Arcsecond of Declination (J2000) (G1)
71- 80 A10 "YYYY/MM/DD" ObsDate Date of the observation
82- 84 I3 --- SNR1 Signal-to-noise at [LiI] (6708Å)
86- 92 F7.2 0.1nm EWHa ?=8888 Hα equivalent width (1)
94 I1 --- u_EWLi [0/8] Flag on EWLi (2)
96-103 F8.3 0.1nm EWLi ?=8888 The [LiI] (6708Å) equivalent
width (1)
105-110 F6.2 km/s RV ? Radial velocity
112-115 F4.2 km/s e_RV ? Error in RV
117-118 A2 --- u_vsini [018:] Flag on vsini (2)
120-126 F7.2 km/s vsini ? Projected rotational velocity (1)
128-132 F5.2 km/s e_vsini ? Error in vsini
134-138 I5 --- SNR2 ?=-99 Signal-to-noise at Ca H & K (3)
140-148 F9.3 --- S ?=-9999. Mount Wilson index of core emission
150-158 F9.3 --- e_S ?=-9999. Error in S
160-161 A2 --- u_S [e ok] Uncertain (e) or (ok) S value
163-175 A13 --- SpType Spectral type
176 A1 --- n_SpType [*] indicates a low surface gravity star
177-181 F5.2 mag B-V ?=-9.99 The (B-V) color index (5)
183-188 A6 --- r_B-V Reference of B-V (6)
190-196 F7.2 [-] RHK ?=99 Log of the chromospheric activity
index (7)
198-202 F5.2 [-] e_RHK ?=99 Error of RHK (7)
204-206 A3 --- u_RHK [e,c] Uncertain RHK (8)
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Note (1): 8888 means that the spectrum was corrupted and no equivalent
width was measurable.
Note (2): the flag qualifies a problem as follows:
0 = upper limit (<);
1 = no limit;
8 = Spectrum was corrupted;
: = vsini value thought to be biased (see Section 4.2).
Note (3): -9999 indicates no measurable value.
Note (5): -9.99 indicates that no (B-V) color is available.
Note (6): Reference as follows:
Tycho = Tycho catalog (Cat. I/259);
Tycho: = Tycho catalog, with a large B-V error (>0.1mag);
SpT = B-V estimated from stellar spectral type;
x = no (B-V) color available.
Note (7): Values of "9999" and "99" in RHK and e_RHK indicate
no measurable RHK or error.
Note (8): Quality as follows:
e = has an uncertain S value.
c = (B-V) colors are outside the range over which R'HK values
are calibrated.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD ? The HD identification number
8- 13 I6 --- HIP ? The Hipparcos identification number
15- 31 A17 --- OName Other name
33- 39 A7 --- Assoc Group source is associated with
45- 46 I2 h RAh ? Hour of Right Ascension (J2000) (G1)
48- 49 I2 min RAm ? Minute of Right Ascension (J2000) (G1)
51- 55 F5.2 s RAs ? Second of Right Ascension (J2000) (G1)
57 A1 --- DE- Sign of the Declination (J2000) (G1)
58- 59 I2 deg DEd ? Degree of Declination (J2000) (G1)
61- 62 I2 arcmin DEm ? Arcminute of Declination (J2000) (G1)
64- 68 F5.2 arcsec DEs ? Arcsecond of Declination (J2000) (G1)
70- 79 A10 "YYYY/MM/DD" Obs.Date Date of the observation
81- 83 I3 --- SNR Signal-to-noise ratio at [LiI] (6708Å)
85- 87 I3 0.1pm Li.1 ? LiI(6708Å) equivalent width of primary
88 A1 --- --- [/]
89- 91 I3 0.1pm Li.2 ? LiI(6708Å) equivalent width, secondary
93- 95 I3 0.1pm Ca.1 ? CaI(6717Å) equivalent width of primary
96 A1 --- --- [/]
97- 99 I3 0.1pm Ca.2 ? CaI(6717Å) equivalent width, secondary
101-105 F5.2 0.1nm Ha.1 ? Hα equivalent width of primary
106 A1 --- n_Ha.1 [/e] 'e' for emission
107-111 F5.2 0.1nm Ha.2 ? Hα equivalent width, secondary
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Global notes:
Note (G1): Coordinates for all stars are from the 2MASS All-Sky Catalog of
Point Sources (Cutri et al. 2003, Cat. II/246), as interpreted by
VizieR (Ochsenbein et al., 2000A&AS..143...23O 2000A&AS..143...23O).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-May-2009