J/A+A/389/845 Spectra of blue compact galaxies (Kong+, 2002)
Spectroscopic study of blue compact galaxies. I. The spectra.
Kong X., Cheng F.Z.
<Astron. Astrophys. 389, 845 (2002)>
=2002A&A...389..845K 2002A&A...389..845K
ADC_Keywords: Galaxies, spectra
Keywords: atlases - galaxies: active - galaxies: evolution -
galaxies: stellar content - techniques: spectroscopic
Abstract:
Blue compact galaxies are compact objects that are dominated by
intense star formation. Most of them have dramatically different
properties compared to the Milky Way and many other nearby galaxies.
Using the IRAS, HI data, and optical spectra, we wanted to measure the
current star formation rates, stellar components, metallicities, and
star formation histories and evolution of a large blue compact galaxy
sample. We anticipate that our study will be useful as a benchmark for
studies of emission line galaxies at high redshift. In the first paper
of this series, we describe the selection, spectroscopic observation,
data reduction and calibration, and spectrophotometric accuracy of a
sample of 97 luminous blue compact galaxies. We present a
spectrophotometric atlas of rest-frame spectra, as well as tables of
the recession velocities and the signal-to-noise ratios. The recession
velocities of these galaxies are measured with an accuracy of
δV<67km/s. The average signal-to-noise ratio of sample spectra
is ∼51. The spectral line strengths, equivalent widths and continuum
fluxes are also measured for the same galaxies and will be analyzed in
the next paper of this series.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 99 97 Observation parameters for our 97 blue compact
galaxies
fig4-1.ps 132 3850 Calibrated spectra, Figure 4, part 1
fig4-2.ps 132 3850 Calibrated spectra, Figure 4, part 2
fig4-3.ps 132 3838 Calibrated spectra, Figure 4, part 3
fig4-4.ps 132 3857 Calibrated spectra, Figure 4, part 4
fig4-5.ps 132 3909 Calibrated spectra, Figure 4, part 5
fig4-6.ps 132 3897 Calibrated spectra, Figure 4, part 6
fig4-7.ps 132 3641 Calibrated spectra, Figure 4, part 7
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See also:
J/A+A/373/24 : Blue compact galaxies from SBS (Pustilnik+ 2001)
J/A+AS/137/419 : Dynamics of blue compact galaxies I. The data (Oestlin + 1999)
J/A+AS/139/1 : HI in Byurakan blue compact galaxies (Thuan+, 1999)
J/ApJ/511/639 : Abundances in blue compact galaxies (Izotov+, 1999)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Name of the galaxy
12- 20 A9 --- Fig Name of the figure containing the spectrum
22- 31 A10 "DD/MM/YYYY" Date(1) Observation date for the first time
34- 37 I4 s Exp(1) Exposure time for the first time
40- 43 F4.2 --- Air(1) Airmass at the observation
46- 55 A10 "DD/MM/YYYY" Date(2) Observation date for the second time
58- 61 I4 s Exp(2) ? Exposure time for the second time
64- 67 F4.2 --- Air(2) ? Airmass at the observation
70- 76 F7.1 km/s Vobs The recession velocities of galaxies
78 A1 --- leVobs [~] Limit flag on e_Vobs
79- 82 F4.1 km/s e_Vobs Uncertainties of the recession velocities
84- 91 F8.4 10-17W/m2/nm F5500 Flux on 5500Å (from 5475 to 5525Å)
94- 98 F5.1 --- SNRs Signal-to-noise ratios of the spectra
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Acknowledgements: Xu Kong
(End) Patricia Bauer [CDS] 20-Jun-2002