Access to Astronomical Catalogues

← Click to display the menu
J/AJ/123/3356  Palomar/MSU nearby star spectroscopic survey. III. (Gizis+, 2002)

The Palomar/MSU nearby star spectroscopic survey. III. Chromospheric activity, M dwarf ages and the local star formation history. Gizis J.E., Reid I.N., Hawley S.L. <Astron. J. 123, 3356 (2002)> =2002AJ....123.3356G
ADC_Keywords: Stars, nearby ; Stars, M-type ; Spectroscopy ; Radial velocities Keywords: Galaxy: formation - solar neighborhood - stars: chromospheres - stars: formation - stars: low-mass, brown dwarfs Abstract: We present high-resolution echelle spectroscopy of 676 nearby M dwarfs. Our measurements include radial velocities, equivalent widths of important chromospheric emission lines, and rotational velocities for rapidly rotating stars. We identify several distinct groups by their Hα properties and investigate variations in chromospheric activity among early (M0-M2.5) and mid (M3-M6) dwarfs. Using a volume-limited sample together with a relationship between age and chromospheric activity, we show that the rate of star formation in the immediate solar neighborhood has been relatively constant over the last 4Gyr. In particular, our results are inconsistent with recent large bursts of star formation. We use the correlation between Hα activity and age as a function of color to set constraints on the properties of L and T dwarf secondary components in binary systems. We also identify a number of interesting stars, including rapid rotators, radial velocity variables, and spectroscopic binaries. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 66 1609 Radial Velocities table4.dat 77 676 Equivalent Widths table6.dat 24 23 Double-lined binaries
See also: III/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997) V/70 : Nearby Stars, Preliminary 3rd Version (Gliese+ 1991) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 I4 --- [RHG95] ? The number from Papers I and II (G1) 6- 22 A17 --- Name Star name 24- 35 F12.4 d JD Julian Date of observation 37- 42 F6.1 km/s RV ? Radial velocity 44- 49 F6.1 km/s <RV> Mean radial velocity 51- 54 F4.1 km/s e_<RV> ? Observed standard dispersion of <RV> 57- 66 A10 --- Com Comments
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 4 I4 --- [RHG95] The number from Papers I and II (G1) 6- 11 F6.3 0.1nm EWHa The average Halpha equivalent width (2) 13- 18 F6.3 0.1nm EWHeD3 ? The average He D3 (5876) equivalent width (2) 20- 25 F6.3 0.1nm EWHe6678 ? The average He (6678) equivalent width (2) 27- 32 F6.3 0.1nm EWHb ? The average Hbeta equivalent width (2) 34- 39 F6.3 0.1nm EWHg ? The average Hgamma equivalent width (2) 41- 46 F6.3 0.1nm EWHd ? The average Hdelta equivalent width (2) 48- 53 F6.3 0.1nm EWHe ? The average Hepsilon equivalent width (2) 55- 60 F6.3 0.1nm EWH6 ? The average H6 equivalent width (2) 62- 63 I2 --- o_EWHa Number of Hα observations 65- 69 F5.3 0.1nm e_EWHa ? Observed standard dispersion of EWHa (2) 71- 76 F6.3 0.1nm e_EWHb ? Observed standard dispersion of EWHb (2)
Note (2): In Angstroems.
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 4 I4 --- [RHG95] ? Sequential number 9- 17 A9 --- Name Name 19 I1 --- Ref [1-3]? Reference (1)
Note (1): References are numbered as follows: 1 = Strassmeier et al., 1993A&AS..100..173S, Cat. V/76 2 = Tokovinin, 1992A&A...256..121T, Cat. III/191 3 = Delfosse et al., 1999A&A...344..897D
Table 5: Rapid rotators ------------------------------------ [RHG95] Name vsini (km/s) ------------------------------------ 381 G173-039 30 556 GJ 1054A 30 802 G039-029 30 1279 LHS 5134 35 1759 Steph 932 30 2128 G165-008 80 3453 G188-038 37 3198 Gl 791.2 35 Table 7: Candidate single-lined binaries: multiple observations ------------------------------------------------------------------------- [RHG95] Name σ Ref ------------------------------------------------------------------------- 853 LP 476-207 4.0 Delfosse et al., 1999A&A...344..897D 1554 Gl 372 24.0 Harlow, 1996AJ....112.2222H 2097 Gl 508A 5.5 2708 G203-47 34.2 Delfosse et al., 1999A&A...344..897D 3563 Gl 867B 20.9 Table 8: Candidate single-lined binaries: velocity differences ---------------------------------------------------------------------------- [RHG95] Name DV Source ---------------------------------------------------------------------------- 1019 Gl 228A -54 Upgren & Caruso, 1988AJ.....96..719U 1361 Gl 319A -8 Upgren & Harlow, 1996PASP..108...64U 1938 Gl 462 -9 Upgren & Caruso, 1988AJ.....96..719U 2157 Gl 521.1 -25 Stauffer & Hartmann, 1986ApJS...61..531S 2235 Gl 540 -10 Stauffer & Hartmann, 1986ApJS...61..531S 2486 Gl 600 10 Upgren & Caruso, 1988AJ.....96..719U Table 9: Candidate wide binaries ------------------------------------------------------------------------------- Star 1 Vrad Star 2 Vrad Separation DV/σ km/s km/s AU ------------------------------------------------------------------------------- Gl 48 0.5 G22C -4.9 225400 3.1 Gl 22B -3.4 Gl 49 -5.0 Gl 51 -7.3 3530 1.5 Gl 140A 24.0 Gl 140C 19.1 2310 3.3 G192-11 2.0 G192-12 2.8 2965 0.5 Gl 469 -10.2 Gl 471 15.1 52170 17. Wo 9490A -29.2 Wo 9490C -26.6 3538 1.7 Gl 720A -30.4 Gl 720B -32.2 2312 1.7 Gl 897A -0.8 Gl 898 0.7 6068 1.0 Table 10: M and L/T dwarf systems -------------------------------------------------------------------------------- [RHG95] M dwarf Sp. Type V-I Hα L/T dwarf Sp. Type Age Ref Name 0.1nm Name Gyr -------------------------------------------------------------------------------- 1021 Gl 229A M0.5 2.01 -0.5 Gl 229B T >0.32 1 2368 Gl 570BC M1.0 2.12 -0.4 Gl 570D T >0.40 2 G 196-3 M2.5 2.34 4. G196-3B L <0.64 3 3 GJ 1001A M3.5 2.69 < 1. GJ 1001B L >1.4 4 2358 Gl 569 A M2 2.24 1.29 Gl 569Ba/Bb M8/L0? <0.52 5 -------------------------------------------------------------------------------- References: 1: Nakajima et al., 1995Natur.378..463N 2: Burgasser et al., 2000ApJ...531L..57B 3: Rebolo et al., 1998Sci...282.1309R 4: Goldman et al., 1999A&A...351L...5G 5: Martin et al., 2000ApJ...529L..37M Global Notes: Note (G1): The number is merely the rank order in the Preliminary Version of the Third Catalog of Nearby Stars, ADC/CDS Catalog V/70 (pCNS3), and is not an officially recognized designation; it provides a straightforward means of cross-referencing results between tables for this relatively large data set.
History: From electronic version of the journal * 28-Apr-2005: last column of table4 added at CDS. References: Reid et al., Paper I, 1995AJ....110.1838R, Cat. III/198 Hawley et al., Paper II, 1996AJ....112.2799H, Cat. III/198
(End) Greg Schwarz [AAS], Patricia Bauer, Francois Ochsenbein [CDS] 06-Sep-2002
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact