J/A+A/553/A99 Six fossil central galaxies reduced spectra (Eigenthaler+, 2013)
Age and metallicity gradients in fossil ellipticals.
Eigenthaler P., Zeilinger W.W.
<Astron. Astrophys. 553, A99 (2013)>
=2013A&A...553A..99E 2013A&A...553A..99E
ADC_Keywords: Galaxies, spectra
Keywords: galaxies: elliptical and lenticular, cD - galaxies: stellar content -
galaxies: evolution
Abstract:
Fossil galaxy groups are speculated to be old and highly evolved
systems of galaxies that formed early in the universe and had enough
time to deplete their L* galaxies through successive mergers of member
galaxies, building up one massive central elliptical, but retaining
the group X-ray halo.
Considering that fossils are the remnants of mergers in ordinary
groups, the merger history of the progenitor group is expected to be
imprinted in the fossil central galaxy (FCG). We present for the first
time radial gradients of single-stellar population (SSP) ages and
metallicities in a sample of FCGs
We took deep spectra with the long-slit spectrograph ISIS at the
William Herschel Telescope (WHT) for six FCGs.
Description:
The data contain all reduced spectra (wavelength-calibrated and sky
subtracted) for the six FCGs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 108 6 Fossil ellipticals observed with ISIS
sp/* . 6 Individual multi-spectra fits files
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name Galaxy name
16 A1 --- r_Name [ab] Reference (1)
18- 19 I2 h RAh Right ascension (J2000)
21- 22 I2 min RAm Right ascension (J2000)
24- 27 F4.1 s RAs Right ascension (J2000)
29 A1 --- DE- Declination sign (J2000)
30- 31 I2 deg DEd Declination (J2000)
33- 34 I2 arcmin DEm Declination (J2000)
36- 39 F4.1 arcsec DEs Declination (J2000)
41- 45 F5.3 --- z Redshift
47- 51 F5.2 mag r'mag r' magnitude
53 I1 --- Nexp [3/4] Number of exposures
54 A1 --- --- [x]
55- 58 I4 s Texp Exposure time of each exposure
60- 62 I3 deg PA Position angle
64- 67 I4 0.1nm Blam0 [3800] Spectral range, blue arm (lower value)
68 A1 --- --- [-]
69- 72 I4 0.1nm Blam1 [6250] Spectral range, blue arm (upper value)
74- 77 I4 0.1nm Rlam0 Spectral range, red arm (lower value)
78 A1 --- --- [-]
79- 82 I4 0.1nm Rlam1 Spectral range, red arm (upper value)
84- 86 F3.1 arcsec FWHM FWHM
88- 98 A11 --- FileName Name of the fits multi-spectra file in
subdirectory sp
100-103 I4 --- Nsp Number of spectra in the multi-spectra file
105-108 I4 --- Nl Number of wavelengths in the multi-spectra
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Note (1): References as follows:
a = Santos et al. (2007AJ....134.1551S 2007AJ....134.1551S)
b = Eigenthaler & Zeilinger (2009AN....330..978E 2009AN....330..978E)
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Acknowledgements:
Paul Eigenthaler,
(End) Patricia Vannier [CDS] 18-Apr-2013