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J/PASP/109/849            Probing the LHS Catalog        (Gizis+ 1997)

Probing the LHS Catalog I. New Nearby Stars and the Coolest Subdwarf Gizis J.E., Reid, I.N. <Publ. Astron. Soc. Pac. 109, 849 (1997)> =1997PASP..109..849G
ADC_Keywords: Stars, nearby ; Stars, M-type ; Spectroscopy ; Space velocities ; Stars, distances ; Stars, subdwarf Description: We present moderate resolution spectroscopy of 111 cool dwarf stars to supplement the observations we have already presented in the Palomar/MSU Nearby-Star Spectroscopic Survey. The sample consists of 71 suspected nearby stars added to the Preliminary Third Catalog of Nearby Stars since 1991 as well as 40 faint red stars selected from the LHS catalog. The study was aimed at identifying interesting red dwarfs, particularly new nearby, ultracool dwarfs, and very metal-poor stars. The observations were made using the Palomar 60-inch, the Hale 200-inch and the Las Campanas 100-inch telescopes between June 1995 and January 1996. The spectral resolution is approximately 3 Angstroms per pixel with wavelength coverage from 6200 to 7500 Angstroms. Table 2 contains bandstrengths for TiO, CaH, and CaOH indices. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 73 71 Candidate nearby stars: basic data (table 1) table2.dat 77 71 Candidate nearby stars: bandstrengths (table 2) table3.dat 56 71 Candidate nearby stars: Space Velocities table4.dat 58 40 Faint LHS stars
See also: I/87 : the LHS Catalogue (Luyten 1979) V/70 : CNS3 (Nearby Stars, Preliminary 3rd Version; Gliese+ 1991) III/198 : PMSU (Palomar/MSU nearby star spectroscopic survey; Hawley+ 1997) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
2- 14 A13 --- Name *Star name 16 A1 --- Bin *[ps] Primary or secondary binary comp. 18 A1 --- Note1 *[bcde] Individual Note 20- 21 I2 h RAh Right ascension, J2000 23- 24 I2 min RAm Right ascension, J2000 26- 29 F4.1 s RAs Right ascension, J2000 31 A1 --- DE- Declination sign 32- 33 I2 deg DEd Declination, J2000 35- 36 I2 arcmin DEm Declination, J2000 38- 39 I2 arcsec DEs Declination, J2000 41 I1 --- Src *[5] Source of positional data 43- 47 F5.2 mag MV Absolute V magnitude 49- 52 F4.1 pc r *Distance 54- 55 I2 % er Distance uncertainty 57- 58 I2 % wPi *? Weight for trigonometric parallax 60- 62 I3 % wSp ? Weight for spectroscopic parallax 64- 67 A4 --- SpType Spectral type 69- 73 F5.2 mag Vmag Apparent V magnitude
Note on Name: Gl - Gliese (1969, Veroff. Astr. Rechen-Instituts, Heidelberg, Nr. 22) GJ - Gliese & Jahreiss =1979A&AS...38..423G Wo - Woolley et al (1970, R. Obs. Ann., No. 5) =Cat. V/32 LHS - Luyten Half-Second Catalogue =Cat. I/87 LTT - Luyten Two-Tenths Catalogue LP - Luyten Palomar proper-motion catalogue G - Giclas et al (1971, Lowell Proper Motion Survey) =Cat. I/79 Steph - Stephenson (1986, AJ, 91, 137) =Cat. III/123 (Nomenclature note: should be named "StKM") Note on Bin: Components in a binary system are identified as p (primary) or s (secondary, tertiary). Note on Note1: b G 035-027 and LP 469-118: Photometry based upon Fleming et al. (1988) observed V_{system} = 14.20 and assumed Delta V = 0.42 c Steph 2.908: This is the 809th star in Stephenson (1986). Photometry is from Weis (1991). d BD+28 3698: Jahreiss notes that this object is presumably a dK binary with Delta m = 0.8, see Heintz (1993). The distance was estimated by Jahreiss. e LHS 3705: This is also Cou 2234. Estimated distance assumes the system is a binary with Delta m = 0.0 as determined by Couteau (1985). Note on Src: Source of positional data: 5- Digital Sky Survey Codes 1-4 were used in Reid et al. (1995),Hawley et al. (1996), Hawley+ (1997) Note on r: Distance and estimated uncertainty (%) from the authors' data, using a weighted combination of trigonometric and spectroscopic parallaxes. Note on wPi: An entry of -1 indicates that Jahreiss's distance estimates were adopted.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
3- 15 A13 --- Name Star name 19- 23 F5.3 --- TiO1 TiO1 index: F(6718-6723)/F(6703-6708) 25- 29 F5.3 --- TiO2 TiO2 index: F(7058-7061)/F(7043-7046) 31- 35 F5.3 --- TiO3 TiO3 index: F(7092-7097)/F(7079-7084) 37- 41 F5.3 --- TiO4 TiO4 index: F(7130-7135)/F(7115-7120) 43- 47 F5.3 --- TiO5 TiO5 index: F(7126-7135)/F(7042-7046) 49- 53 F5.3 --- CaH1 CaH1 index: F(6380-6390)/F (6345-6355,6410-6420)) 55- 59 F5.3 --- CaH2 CaH2 index: F(6814-6846)/F(7042-7046) 61- 65 F5.3 --- CaH3 CaH3 index: F(6960-6990)/F(7042-7046) 67- 71 F5.3 --- CaOH ? CaOH index: F(6230-6240)/F(6345-6354) 73- 77 F5.2 0.1nm Halpha ? H-alpha Eq. Width
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
2- 14 A13 --- Name Star name 16- 22 F7.4 arcsec/yr pmRA Proper motion in right ascension, from CNS3 24- 30 F7.4 arcsec/yr pmDE Proper motion in declination, from CNS3 32- 37 F6.1 km/s RV Radial velocity 39- 41 I3 km/s U U space velocity 43- 46 I4 km/s V V space velocity 48- 50 I3 km/s W W space velocity 52- 56 F5.2 mag MV Absolute V magnitude (from table1.dat)
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
2- 9 A8 --- Name *Star name 12 A1 --- Note1 *[a] Individual Note 14- 17 F4.1 --- mr r magnitude from Luyten (1979) 19- 23 F5.3 --- TiO5 TiO5 index: F(7126-7135)/F(7042-7046) 25- 29 F5.3 --- CaH1 CaH1 index: F(6380-6390)/F (6345-6355,6410-6420)) 31- 35 F5.3 --- CaH2 CaH2 index: F(6814-6846)/F(7042-7046) 37- 41 F5.3 --- CaH3 CaH3 index: F(6960-6990)/F(7042-7046) 43- 45 F3.1 0.1nm Halpha ? H alpha Equivalent Width 47- 53 A7 --- SpType Spectral Type 55- 58 I4 km/s RV ? Radial Velocity
Note on Name: LHS - Luyten Half-Second Catalogue =Cat. I/87 Note on Note1: a Probably misidentified.

(End) John Gizis [U.Mass] 14-Nov-1997
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