J/ApJ/734/82 NIR spectroscopy of five dwarf galaxies (Izotov+, 2011)
Near-infrared spectroscopy of five blue compact dwarf galaxies: II Zw 40,
Mrk 71, Mrk 930, Mrk 996, and SBS 0335-052E.
Izotov Yu.I., Thuan T.X.
<Astrophys. J., 734, 82 (2011)>
=2011ApJ...734...82I 2011ApJ...734...82I
ADC_Keywords: Galaxies, spectra ; Abundances ; Spectroscopy
Keywords: galaxies: abundances - galaxies: individual (II Zw 40, Mrk 71, -
Mrk 930, Mrk 996, SBS 0335-052E) - galaxies: irregular -
galaxies: ISM - H II regions - infrared: ISM
Abstract:
We present near-infrared (NIR) spectroscopic observations of five blue
compact dwarf (BCD) galaxies, II Zw 40, Mrk 71, Mrk 930, Mrk 996, and
SBS 0335-052E. The NIR spectra which cover the 0.90-2.40um wavelength
range show hydrogen, molecular hydrogen, helium, sulfur, and iron
emission lines. The NIR data for all BCDs have been supplemented by
optical spectra.
Description:
NIR spectra of the BCDs II Zw 40, Mrk 71, Mrk 930, Mrk 996, and
SBS 0335-052E were obtained with the 3.5m APO telescope in
conjunction with the TripleSpec spectrograph on the night of 2009
November 25.
The optical observations of all galaxies, with the exception of
Mrk 930, were obtained with the 3.5m APO telescope in the course of
several nights during the period 2008 November-2010 February.
For Mrk 930, we have used the optical spectrum obtained by Izotov &
Thuan (1998ApJ...500..188I 1998ApJ...500..188I).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
galaxies.dat 111 5 List of galaxies studied (from table1)
table3.dat 64 94 Fluxes of optical and NIR emission lines in II Zw 40
table4.dat 71 105 Fluxes of optical and NIR emission lines in Mrk 71
table5.dat 71 43 Fluxes of optical and NIR emission lines in Mrk 930
table6.dat 64 51 Fluxes of optical and NIR emission lines in Mrk 996
table7.dat 71 52 Fluxes of optical and NIR emission lines in
SBS 0335-052E
--------------------------------------------------------------------------------
See also:
VI/39 : Model Atmospheres (Kurucz, 1979)
J/ApJ/708/1076 : The WHIQII survey: compact blue galaxies (Tollerud+, 2010)
J/A+A/476/89 : HII galaxies narrow-band Hbeta images (Lagos+, 2007)
J/ApJS/164/81 : Spectrophotometry of nearby galaxies (Moustakas+, 2006)
J/A+A/448/955 : Abundances of emission galaxies in SDSS-DR3 (Izotov+, 2006)
J/ApJS/161/240 : High-ionization emission in BCDs (Thuan+, 2005)
J/ApJ/602/200 : HII regions abundances in BCD galaxies (Izotov+, 2004)
J/ApJ/511/639 : Abundances in blue compact galaxies (Izotov+, 1999)
Byte-by-byte Description of file: galaxies.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
2- 14 A13 --- Name Galaxy name
17- 23 F7.5 --- z Redshift
26- 30 F5.1 Mpc Dist Distance
32- 36 F5.2 --- [O/H] Oxygen abundance log(O/H)+12
38- 43 F6.2 aW/m2 FHb Hβ flux (10-15erg/s/cm2)
45- 48 F4.2 aW/m2 e_FHb Mean error on FHb
51- 55 F5.3 --- C1 Extinction coefficient C(Hβ) for R=3.2
57- 60 F4.2 0.1nm EW1 Equivalent width EW(abs) of hydrogen lines
63- 67 F5.3 --- C2 Extinction coefficient C(Hβ) for R=2.5
69- 72 F4.2 0.1nm EW2 Equivalent width EW(abs) of hydrogen lines
74- 75 I2 h RAh Right Ascension J2000 (hours)
77- 78 I2 min RAm Right Ascension J2000 (minutes)
80- 83 F4.1 s RAs Right Ascension J2000 (seconds)
85 A1 --- DE- Declination J2000 (sign)
86- 87 I2 deg DEd Declination J2000 (degrees)
89- 90 I2 arcmin DEm Declination J2000 (minutes)
92- 93 I2 arcsec DEs Declination J2000 (seconds)
95 A1 --- --- [=]
97-111 A15 --- SimName Name understandable by Simbad
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table[34567].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 F5.3 um lambda [0.37/2.36] Wavelength
7- 18 A12 --- Ion Ion/blend
20- 25 F6.2 --- UFlux Uncorrected line flux, normalized to Hβ=100
27- 31 F5.2 --- e_UFlux Uncertainty in UFlux
33- 38 F6.2 --- C1Flux Corrected line flux/Hβ ratio (1)
40- 44 F5.2 --- e_C1Flux Uncertainty in C1Flux
46- 51 F6.2 --- C2Flux Corrected line flux/Hβ ratio (1)
53- 57 F5.2 --- e_C2Flux Uncertainty in C2Flux
59- 64 F6.2 --- CLFlux ? CLOUDY-predicted flux of the emission line
with a pure stellar ionizing radiation
66- 71 F6.2 --- CSFlux ? CLOUDY-predicted flux of the emission line
with stellar radiation and wind shock
--------------------------------------------------------------------------------
Note (1): corrected with extinction coefficients C1 and C2 given in
the "galaxies.dat" table.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 26-Nov-2012