J/AJ/130/1871 Spectroscopic survey of M dwarfs (Bochanski+, 2005)
Spectroscopic survey of M dwarfs within 100 parsecs of the Sun.
Bochanski J.J., Hawley S.L., Reid I.N., Covey K.R., West A.A., Tinney C.G.,
Gizis J.E.
<Astron. J., 130, 1871-1879 (2005)>
=2005AJ....130.1871B 2005AJ....130.1871B
ADC_Keywords: Photometry, infrared ; Proper motions ; Equivalent widths ;
Radial velocities ; Space velocities
Keywords: solar neighborhood - stars: late-type -
stars: low-mass, brown dwarfs - stars: magnetic fields
Abstract:
We have constructed a sample of M dwarfs out to a distance of ∼100pc.
This sample of 605 stars (574 M dwarfs and 31 K dwarfs) have been
spectroscopically observed, yielding spectral types, radial
velocities, Hα equivalent widths, and molecular band indices.
Photometric observations have been compiled, with photographic plates
providing RI magnitudes and JHKs magnitudes from Two Micron All Sky
Survey (Cat. II/246) observations. Proper motions were determined by
a match to USNO-B (Cat. I/284), and distances were computed
employing a spectroscopic parallax, allowing the computation of UVW
space motions.
Description:
Observations were obtained at Las Campanas Observatory during UT 1990
June 12-14; 1990 October 4, 5, and 8; and 1991 May 29. Observations at
Lick Observatory were obtained over nine nights in 1992-1993: 1992 May
11-12, 1992 June 11, 1992 August 21-22, 1992 December 2, 1993 February
12, and 1993 April 28-29 (all dates are UT).The remainder of the data
obtained for this program were accumulated during 1993 September 14-20
at the 200inch (5m) Hale Telescope at Palomar Observatory.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 71 574 100pc sample: photometric & spectroscopic properties
table2.dat 46 574 100pc sample: velocities & distances
table3.dat 75 31 Ancillary data: K star data
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See also:
III/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997)
J/AJ/123/3356 : Palomar/MSU nearby star spectroscopic survey III (Gizis+ 2002)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [BHR2005] Index number
5- 7 I3 --- Field Field number
9- 11 I3 --- Star Star number in the Field
13- 20 F8.4 deg RAdeg Right Ascension in decimal degrees (J2000)
22- 29 F8.4 deg DEdeg Declination in decimal degrees (J2000)
31- 34 F4.1 mag Rcmag The Cousins R band magnitude
36- 38 F3.1 mag Rc-Ic The (Rc-Ic) color index
40- 42 F3.1 mag Rc-K The (Rc-K) color index
44- 47 F4.2 mag J-H The 2MASS (J-H) color index
49- 52 F4.2 mag H-Ks The 2MASS (H-Ks) color index
54- 57 F4.2 --- TiO5 The TiO5 bandstrength index (1)
59- 62 F4.2 --- CaH2 ? The CaH2 bandstrength index (1)
64- 67 F4.1 0.1nm EWHa Hα equivalent width in units of Angstroms
69- 71 F3.1 --- Mtype Subdivision for M spectral type
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Note (1): Bandstrengths are determined by measuring the ratio between the flux
within a small wavelength region centred on the feature in question,
and a nearby pseudo-continuum point.
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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- 3 I3 --- [BHR2005] Index number
5- 8 I4 km/s Uvel ? Velocity towards Galactic anticenter
10- 13 I4 km/s Vvel ? Velocity in direction of galactic rotation
15- 18 I4 km/s Wvel ? Velocity toward North Galactic Pole
20- 25 F6.1 mas/yr pmRA Proper motion in Right Ascension
27- 32 F6.1 mas/yr pmDE Proper motion in Declination
34- 37 I4 km/s RV ? Radial Velocity
39- 41 I3 pc Dist Distance from Sun (1)
43- 46 I4 pc Z Vertical distance from the galactic plane
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Note (1): Using spectroscopic parallax relation in Eqn. 1.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Field Field number
5- 7 I3 --- Star Star number
9- 16 F8.4 deg RAdeg Right Ascension in decimal degrees (J2000)
18- 23 F6.4 deg e_RAdeg ? Error in RAdeg
25- 31 F7.4 deg DEdeg Declination in decimal degrees (J2000)
33- 36 F4.1 mag Rcmag The Cousins R band magnitude
38- 40 F3.1 mag Rc-Ic The (Rc-Ic) color index
42- 45 F4.2 mag Rc-K The (Rc-K) color index
47- 50 F4.2 mag J-H The (J-H) color index
52- 57 F6.2 mag H-Ks The (H-Ks) color index
59- 64 F6.1 mas/yr pmRA Proper motion in Right Ascension
66- 71 F6.1 mas/yr pmDE ? Proper motion in Declination
73- 75 I3 km/s RV Radial velocity
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History:
From electronic version of the journal
References:
Reid et al., Paper I 1995AJ....110.1838R 1995AJ....110.1838R, Cat. III/198
Gizis et al., Paper II 1996AJ....112.2799H 1996AJ....112.2799H, Cat. III/198
Gizis et al., Paper III 2002AJ....123.3356G 2002AJ....123.3356G, Cat. J/AJ/123/3356
Reid et al., Paper IV 2002AJ....124.2721R 2002AJ....124.2721R
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 02-Jan-2006