J/ApJ/613/914 Star formation in HI-selected galaxies (Helmboldt+, 2004)
Star formation in HI-selected galaxies. I. Sample characteristics.
Helmboldt J.F., Walterbos R.A.M., Bothun G.D., O'Neil K., De Blok W.J.G.
<Astrophys. J., 613, 914-932 (2004)>
=2004ApJ...613..914H 2004ApJ...613..914H
ADC_Keywords: Galaxies, photometry ; Galaxies, radio ; Equivalent widths
Keywords: galaxies: ISM - galaxies: photometry - galaxies: stellar content
Abstract:
A sample of 69 galaxies with radial velocities of less than 2500km/s
was selected from the HI Parkes All-Sky Survey (HIPASS, Cat.
VIII/73) and imaged in broadband B and R and narrowband Hα, to
deduce details about star formation in nearby disk galaxies while
avoiding surface brightness selection effects.
Description:
Data were acquired during two separate observing runs. Images were
obtained at Cerro Tololo Inter-American Observatory (CTIO) with the
0.9m telescope and the Tek 2Kx2K CCD camera during both runs, one on
2000 March 3-9 and the other on 2000 October 23-28 and November 2, 5,
and 6.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 112 71 Observations
table4.dat 51 69 Isophotal Data
table5.dat 63 69 Surface brightness profile data
table6.dat 71 69 Emission line data
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See also:
VIII/73 : HI Parkes All Sky Survey Catalogue (HIPASS) (Meyer+, 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 31 A31 --- Date Observation location and dates
33- 45 A13 --- Name Galaxy name
47- 52 I6 --- UTDate UT Date of observation
54- 55 I2 h RAh NED Hour of Right Ascension (J2000)
57- 58 I2 min RAm NED Minute of Right Ascension (J2000)
60- 64 F5.2 s RAs NED Second of Right Ascension (J2000)
66 A1 --- DE- Sign of the NED Declination (J2000)
67- 68 I2 deg DEd NED Degree of Declination (J2000)
70- 71 I2 arcmin DEm NED Arcminute of Declination (J2000)
73- 76 F4.1 arcsec DEs NED Arcsecond of Declination (J2000)
78 I1 --- nB B band number of exposures
80 A1 --- --- [X]
82- 84 I3 s tB B band exposure time
86 I1 --- nR ? R band number of exposures
88 A1 --- --- [X]
90- 92 A3 s tR ? R band exposure time
94 I1 --- nHa ? Hα band exposure time
96 A1 --- --- [X]
98-101 I4 --- tHa ? The Hα band exposure time
103-111 A9 --- Ha Hα filter description (1)
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Note (1): Hα filter used during observation(s); the 657, 658, 659,
660, & 661nm filters are the 30Å Rand filters; the 6563, 6600,
6618, & 6653Å filters are the NOAO 75Å filters.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Galaxy name
15 A1 --- f_Name [*] Flag on Name (G1)
16 A1 --- i26 [d] data are for the 26mag/arcsec2 isophote.
18- 23 A6 --- MType Morphological type (2)
25- 27 I3 arcsec R25 The 25 mag/arcsec2 isophotal radius
29- 32 F4.1 mag B25mag The B band isophotal magnitude within R25
34- 37 F4.1 mag R25mag The R band isophotal magnitude within R25
39- 43 F5.3 mag E(B-V) The (B-V) color excess
45- 46 I2 deg Inc Inclination
48- 50 I3 deg PA [-90/128] Position angle (3)
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Note (2): Morphological type, in the de Vaucouleurs classification system.
Note (3): Position angle measured from North through East.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Galaxy name
15 A1 --- f_Name [*] Flag on Name (G1)
17- 20 F4.1 mag Bmag Total extrapolated B band magnitude
22- 25 F4.1 mag Rmag Total extrapolated R band magnitude
27- 31 F5.2 mag B-R The (B-R) color index within Rad (2)
33- 37 F5.1 arcsec Rad Effective radius
39- 42 F4.1 mag/arcsec2 muBe The B band surface brightness at Rad
44- 47 F4.1 mag/arcsec2 muRe The R band surface brightness at Rad
49- 52 F4.1 arcsec Dscl Disk scale length
54- 57 F4.1 mag/arcsec2 muBo Extrapolated B band disk central
surface brightness (2)
59- 62 F4.1 mag/arcsec2 muRo Extrapolated R band disk central
surface brightness (2)
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Note (2): All colors and central surface brightnesses were corrected for
Galactic extinction using E(B-V) values quoted in the NASA/IPAC
Extragalactic Database (NED) and E(B-V) to Aν conversion factors
provided by Schlegel et al. (1998ApJ...500..525S 1998ApJ...500..525S).
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Galaxy name
15 A1 --- f_Name [*] Flag on Name (G1)
16 A1 --- n_logHa [s] Hα flux calibration (1)
18- 23 F6.2 [mW/m2] log(Ha+NII) ? Log of the observed Hα+[NII]
flux in units of ergs/s/cm2
25- 30 F6.2 [mW/m2] logHa ? Log of the Hα flux in
units of ergs/s/cm2 (2)
32- 37 F6.1 0.1nm EW(Ha+NII) ? Observed equivalent width of
Hα+[NII] in units of Angstroms
39- 44 F6.1 0.1nm EWHa ? Equivalent width of Hα in
units of Angstroms (3)
46- 50 F5.1 Jy.km/s SHI Integrated 21 cm flux
52- 55 F4.2 solMass/solLum MHI/LB The B band gas-to-light ratio (4)
57- 60 F4.2 solMass/solLum MHI/LR The R band gas-to-light ratio (4)
62- 65 I4 km/s RV Measured radial velocity
67- 70 I4 km/s RVcorr Corrected radial velocity (5)
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Note (1): 's' indicates that the Hα flux was calibrated
using the R-band flux.
Note (2): Hα flux corrected for [NII] emission and Galatic
and internal extinction.
Note (3): Hα equivalent width corrected for [NII] emission.
Note (4): B and R band gas-to-light ratio corrected for Galactic extinction.
Note (5): Radial velocity corrected for Virgo-centric infall relative to the
rest frame of the Local Group.
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Global Notes:
Note (G1): the asterisk (*) indicates that galaxy image was most likely
taken through clouds and the values listed should be taken as
estimates only.
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 23-Mar-2005