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J/A+A/430/303 MgII-K line fluxes in cool active and quiet stars (Cardini+, 2005)

Mg II chromospheric radiative loss rates in cool active and quiet stars. Cardini D. <Astron. Astrophys., 430, 303-311 (2005)> =2005A&A...430..303C
ADC_Keywords: Stars, late-type ; Ultraviolet ; Line Profiles Keywords: stars: late-type - stars: chromospheres - stars: activity - ultraviolet: general - line: profiles Abstract: The MgIIk emission line is a good indicator of the level of chromospheric activity in late-type stars. We investigate the dependence of this activity indicator on fundamental stellar parameters. To this purpose we use IUE observations of the MgIIk line in 225 late-type stars of luminosity classes I-V, with different levels of chromospheric activity. We first re-analyse the relation between MgIIk line luminosity and stellar absolute magnitude, performing linear fits to the points. The ratio of MgII surface flux to total surface flux is found to be independent of stellar luminosity for evolved stars and to increase with decreasing luminosity for dwarfs. We also analyse the MgIIk line surface flux-metallicity connection. Description: The data base used in the present paper was generated starting from the original sample of 230 normal stars used in a study of the Wilson-Bappu effect by Cassatella et al. (2001, Cat. J/A+A/374/1085, Paper I). It was a sample of stars with good quality MgII observations from IUE (see Sect. 3) and known parallaxes from HIPPARCOS with luminosity classes ranging from I to V. The resulting sample (225 stars) consists of an accurately selected, uniformly reduced and homogeneously calibrated data set. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 64 23 MgII-K line fluxes for BY Dra stars table2.dat 71 29 MgII-K line fluxes for RS CVn stars table3.dat 38 100 MgII-K line fluxes for normal stars
See also: J/A+A/374/1085 : MgII K line Wilson-Bappu relationship (Cassatella+, 2001) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1 A1 --- --- [*] 2- 7 I6 --- HIP HIP number 9- 21 A13 --- Name Name 24- 34 A11 --- SpType MK spectral type 36 I1 --- r_SpType Reference for spectral type (1) 38- 41 F4.2 mag B-V B-V colour index 43- 46 F4.2 mag VMAG Absolute V magnitude 48- 51 F4.2 [mW/m2] logSF log of the surface MgIIk flux 53- 57 F5.2 [Sun] [Fe/H] ?=- Metallicity 59 A1 --- bin [*] indication of binarity (2) 61- 64 A4 --- Note Note for double-lined spectra objects (2)(3)
Note (1): References as follows: 1 = Cutispoto et al., 1998, Cat. J/A+AS/131/321 2 = Cutispoto et al., 2003, Cat. J/A+A/400/649 3 = Gray et al., 2003, Cat. J/AJ/126/2048 4 = Strasbourg Data Center (SIMBAD) 5 = Catalog of Active Binary Stars (CABS) by Strassmeier et al., 1993, Cat. V/76 Note (2): According to CABS (Cat. V/76) except for V838 Cen (see Cutispoto 1998, Cat. J/A+AS/131/321) Note (3): For objects with double-lined spectra, the last column indicates which one of the stellar components is the active star.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HIP HIP number 8- 21 A14 --- Name Name 23- 39 A17 --- SpType MK spectral type (1) 40- 44 F5.1 d Per Orbital period (1) 46- 49 F4.2 mag B-V B-V colour index 51- 55 F5.2 mag VMAG Absolute V magnitude 57- 60 F4.2 [mW/m2] logSF log of the surface MgII-K flux 62- 66 F5.2 [Sun] [Fe/H] ?=- Metallicity 68- 71 A4 --- Note Note for double-lined spectra objects (2)
Note (1): Spectral types and orbital periods are from the Catalog of Active Binary Stars (CABS, V/76) except for IL Hya (see Weber and Strassmeier, 1998A&A...330.1029W) Note (2): According to CABS (Cat. V/76) except for TZ Tri and IL Hya (see Montes et al., 1995A&AS..114..287M and Fekel et al., 1999, Cat. J/A+AS/137/369 respectively).
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HIP HIP number 8- 15 A8 --- SpType MK spectral type 18- 21 F4.2 mag B-V B-V colour index 23- 27 F5.2 mag VMAG Absolute V magnitude 29- 32 F4.2 [mW/m2] logSF log of the surface MgII-K flux 34- 38 F5.2 [Sun] [Fe/H] ?=- Metallicity
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 30-Jun-2006
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

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