J/A+A/434/887 HI data of blue compact dwarf galaxies (Huchtmeier+, 2005)
HI-observations of blue compact dwarf galaxies.
Huchtmeier W.K., Gopal Krishna, Petrosian A.
<Astron. Astrophys. 434, 887 (2005)>
=2005A&A...434..887H 2005A&A...434..887H
ADC_Keywords: Galaxies, photometry ; H I data ; Radial velocities ; Morphology
Keywords: galaxies: dwarf - galaxies: evolution -
galaxies: fundamental parameters
Abstract:
We present HI-observations of 56 blue compact dwarf (BCD) galaxies of
which 44 have been detected in the 21-cm line from neutral hydrogen
with the 100-m radiotelescope at Effelsberg. Optical data (e.g., from
NED) and HI data from other observers and telescopes are used to
estimate the likelihood of confusion from other galaxies within the
Effelsberg beam. The selected 29 BCD galaxies without any sign of
confusion are used to infer several characteristic properties of the
BCD galaxy population. In some respects, they resemble normal
galaxies: e.g., the relations between global parameters like linear
diameter A0 versus blue luminosity LB and the MHI/LB ratio vs. LB.
At least five of these BCDGs emit milli-Jansky level radio continuum
emission.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 90 60 Observational data
table2.dat 64 44 Derived global parameters for our sample of galaxies
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See also:
J/A+A/319/67 : HI observations of dwarf galaxies in voids (Huchtmeier+ 1997)
J/A+AS/139/1 : HI in Byurakan blue compact galaxies (Thuan+, 1999)
J/A+A/366/428 : HI observations of nearby dwarf galaxies (Karachentsev+, 2001)
J/A+AS/141/469 : First list of the Karachentsev catalog (Huchtmeier+, 2000)
J/A+AS/147/187 : Second list of the Karachentsev catalog (Huchtmeier+, 2000)
J/A+A/366/428 : Third list of the Karachentsev catalog (Karachentsev+, 2001)
J/A+A/377/801 : Fourth list of the Karachentsev catalog (Huchtmeier+, 2001)
J/A+A/429/115 : JHK' photometry of Blue Compact Dwarf Galaxies (Noeske+, 2005)
J/ApJS/147/29 : BRHalpha data of blue compact dwarf gal. (Gil De Paz+, 2003)
J/AZh/79/867 : Abundances of HII regions in blue galaxies (Holovatyy+, 2002)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Galaxy Galaxy designation
15- 16 I2 h RAh Right ascension (J2000)
18- 19 I2 min RAm Right ascension (J2000)
21- 24 F4.1 s RAs Right ascension (J2000)
26 A1 --- DE- Declination sign (J2000)
27- 28 I2 deg DEd Declination (J2000)
30- 31 I2 arcmin DEm Declination (J2000)
33- 34 I2 arcsec DEs Declination (J2000)
36- 41 A6 --- MType Morphological type (1)
43- 45 I3 arcsec Size1 Optical size (2)
47- 48 I2 arcsec Size2 Optical size (2)
50- 53 F4.1 mag BTmag Total blue apparent magnitude (3)
55- 58 I4 km/s HRVo Optical heliocentric radial velocity
60- 64 F5.2 Jy.km/s FHI ? Measured HI flux
66- 70 F5.1 mJy Speak ? Observed peak flux of the line at 21cm
72- 74 F3.1 mJy e_Speak rms error on Speak (4)
76- 79 I4 km/s HRV ? Heliocentric radial velocity derived from
the midpoint of the line at 50% of the peak
81- 82 I2 km/s e_HRV ? rms uncertainty on HRV
84- 86 I3 km/s W50 ? Linewidth at a level of 50% of the line peak
88- 90 I3 km/s W20 ? Linewidth at a level of 20% of the line peak
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Note (1): Morphological type:
BCD = blue compact dwarfs
Int = interacting galaxies
Note (2): Optical dimensions corresponding to the blue surface brightness
level at 25mag/arcsec2
Note (3): From HYPERLEDA, http://www-obs.univ-lyon1.fr/hypercat/ ;
for SBS1331+493 and SBS1428+457 from Doublier et al. (1997A&AS..124..405D 1997A&AS..124..405D)
Note (4): For non detections only the rms noise is shown.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Galaxy Galaxy designation
16- 19 I4 km/s V(3Kbgd) Optical heliocentric velocity reduced to
the frame of the cosmic microwave
background (using NED)
21- 23 I3 Mpc Dist Distance (using H0=72km/s/Mpc) (1)
25- 28 F4.1 kpc Diam Linear diameter, A0,i
30- 34 F5.1 mag BMAG Absolute B magnitude Corrected for Galactic
extinction and internal absorption (2)
36- 40 F5.2 10+8solMass MHI Total HI mass
41- 45 F5.1 10+8solMass Mass Total mass
47- 51 F5.2 Sun MHI/LB HImass to B luminosity ratio
53- 57 F5.1 Sun Mass/LB Total mass to B luminosity ratio
59- 62 F4.2 Sun MHI/Mass HI to total mass ratio
64 A1 --- Comm [c] Comments (3)
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Note (1): Optical diameter in the D25 system (in table1) have been
corrected for absorption and for inclination, where the inclination
was derived from the axial ratio assuming an intrinsic axial ratio of
0.2 (e.g. Tully 1985, in view of the uncertainties in these
inclinations we did not apply corrections for possible type dependence
of the intrinsic axial ratio):
log(a0) = loga =0/09Ab =0.2log(a/b),
where the foreground absorption in the blue Ab is from Schlegel et
al. (1998ApJ...500..525S 1998ApJ...500..525S) (as given in the NED).
Note (2): The internal absorption in a galaxy in the B-band, Ai,
depends on inclination and luminosity:
Ai=[1.6+2.8(logVm-2.2)]*log(a/b) ; Vm≥42.7km/s
Ai=0 - other
Here we use the following definition of Vm: The HI rotational
velocity Vm=W50/(2sini) corrected for inclination and turbulent
motion (Tully and Fouque, 1985ApJS...58...67T 1985ApJS...58...67T) with isotropic
non-circular motion parameter σz=8km/s.
Note (3): A "c" indicates that the HI data are (probably) confused by
neighboring galaxies within the antenna beam (Section 4).
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Acknowledgements: Walter Huchtmeier, p083huc(at)mpifr-bonn.mpg.de
(End) Patricia Vannier [CDS] 10-Feb-2005