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J/A+A/575/A57       LQ Hya activity and Li variations   (Flores Soriano+, 2015)

Chromospheric activity and lithium line variations in the spectra of the spotted star LQ Hydrae. Flores Soriano M., Strassmeier K. G., Weber M. <Astron. Astrophys. 575, A57 (2015)> =2015A&A...575A..57F
ADC_Keywords: Stars, variable ; Abundances ; Effective temperatures ; Equivalent widths Keywords: stars: abundances - stars: activity - stars: chromospheres - stars: flare - stars: rotation - stars: individual: LQ Hydrae Abstract: We study the rotational modulation of chromospheric and photospheric parameters of the young, active, single K2 dwarf LQ Hya and their connection with the variability of the LiI 670.8nm line. A total of 199 high-resolution STELLA spectra were used to compute effective temperature, gravity, and chromospheric activity indicators like Hα and Hβ emission, Balmer decrement, and chromospheric electron density, as a function of the rotational phase. The variation of the LiI 670.8nm line were characterized in terms of equivalent width, abundance, and of 6Li/7Li isotopic ratio in the form of line shifts. Description: We preset in these two tables the observing log and the numerical results of the spectral analysis of LQ Hya. They are a tabular version of the results shown in the figures of the paper. Objects: ------------------------------------------------ RA (2000) DE Designation(s) ------------------------------------------------ 09 32 25.6 -11 11 05 V* LQ Hya = HD 82558 ------------------------------------------------ File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file single.dat 156 199 Observation log and measurements over single spectra average.dat 37 10 Phase-averaged measurements of the electron density and LiI 670.8nm central wavelength
See also: J/A+A/276/345 : Photometry of variable LQ Hya (Jestu 1993) J/A+A/394/505 : UBV photometry of LQ Hya (Berdyugina+, 2002) J/A+A/542/A38 : LQ Hya V-band differential light curve (Lehtinen+, 2012) Byte-by-byte Description of file: single.dat
Bytes Format Units Label Explanations
1- 12 F12.3 d HJD Heliocentric Julian Date 13- 18 F6.3 --- Phase [0/1] Rotational phase 19- 22 I4 --- S/N [40/120] Signal to noise ratio 23- 27 I5 K Teff [4949/5030] Effective temperature 28- 30 I3 K e_Teff [2/16] Error of Teff 31- 35 F5.2 [cm/s2] logg [4.54/4.72] Surface gravity 36- 40 F5.2 [cm/s2] e_logg [0.01/0.04] Error of logg 41- 45 F5.2 0.1nm EWHa [0.7/1.9] Equivalent width of Hα (Å) 46- 50 F5.2 0.1nm e_EWHa Error of EWHa 51- 59 E9.3 mW/m2 FHa Chromospheric radiative loss in Hα 60- 67 E8.2 mW/m2 e_FHa Error of FHa 68- 73 F6.3 0.1nm EWHb Equivalent width of Hβ 74- 79 F6.3 0.1nm e_EWHb Error of EWHb 80- 88 E9.3 mW/m2 FHb Chromospheric radiative loss in Hβ 89- 96 E8.2 mW/m2 e_FHb Error of FHb 97-103 F7.3 0.1nm EWHe [-0.01/0.036]? Equivalent width of He D3 (1) 104-110 F7.3 0.1nm e_EWHe [0.006/0.014]? Error EWHeD3 (1) 111-116 F6.3 0.1nm EWLi [0.20/0.25] Equivalent width of LiI 670.8nm 117-122 F6.3 0.1nm e_EWLi [0.005/0.012] Error of EWLi 123-127 F5.2 [-] logNLi [2.5/2.7] Lithium abundance from EWLi, Teff and logg (logNLi+12) 128-132 F5.2 [-] e_logNLi [0.02/0.06] Error of logNLi 133-138 F6.3 0.1nm EWCaI1 [0.374/0.42] Equivalent width of CaI 643.9nm 139-144 F6.3 0.1nm e_EWCaI1 [0.003/0.01] Error of EWCaI1 145-150 F6.3 0.1nm EWCaI2 [0.214/0.26] Equivalent width of CaI 671.8nm 151-156 F6.3 0.1nm e_EWCaI2 [0.003/0.01] Error of EWCaI2
Note (1): HeI D3 line (587.56nm), only calculated for spectra with FHa<4.7x10+6mW/m2.
Byte-by-byte Description of file: average.dat
Bytes Format Units Label Explanations
1- 5 F5.2 --- Phase [0/1] Central rotational phase φ of the averaged interval 6- 14 E9.3 cm-3 ne Electron density Ne(φ) 15- 22 E8.2 cm-3 e_ne Error of ne 23- 31 F9.3 0.1nm lam.c [6707.819/6707.831] Central wavelength of the LiI 670.8nm line 32- 37 F6.3 0.1nm e_lam.c Error of central wavelength
Acknowledgements: Manuel Flores Soriano, mflores(at)
(End) Manuel Flores Soriano [AIP], Patricia Vannier [CDS] 21-Jan-2015
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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