J/AJ/139/279 Outlying HII regions in HI-selected galaxies (Werk+, 2010)
Outlying H II regions in H I-selected galaxies.
Werk J.K., Putman M.E., Meurer G.R., Ryan-Weber E.V., Kehrig C.,
Thilker D.A., Bland-Hawthorn J., Drinkwater M.J., Kennicutt R.C.,
Wong O.I., Freeman K.C., Oey M.S., Dopita M.A., Doyle M.T., Ferguson H.C.,
Hanish D.J., Heckman T.M., Kilborn V.A., Kim J.H., Knezek P.M.,
Koribalski B., Meyer M., Smith R.C., Zwaan M.A.
<Astron. J., 139, 279-295 (2010)>
=2010AJ....139..279W 2010AJ....139..279W
ADC_Keywords: Galaxies, radio ; H II regions
Keywords: galaxies: halos - galaxies: star clusters - H II regions -
intergalactic medium - stars: formation
Abstract:
We present results from the first systematic search for outlying
HII regions, as part of a sample of 96 emission-line point sources
(referred to as ELdots-emission-line dots) derived from the NOAO
Survey for Ionization in Neutral Gas Galaxies (SINGG). Our automated
ELdot finder searches SINGG narrowband and continuum images for high
equivalent width point sources outside the optical radius of the
target galaxy (>2xr25 in the R band). Follow-up long-slit
spectroscopy and deep Galaxy Evolution Explorer (GALEX) images
(exposure time >1000s) distinguish outlying HII regions from
background galaxies whose strong emission lines ([OIII], H{beta], or
[OII]) have been redshifted into the SINGG bandpass.
Description:
We searched for ELdots (emission-line point sources) in the SINGG
(Survey for Ionization in Neutral Gas Galaxies) Release 1 (SR1)
imaging data presented by Meurer et al. (2006, Cat. J/ApJS/165/307).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 85 72 ELdots found in SINGG (Survey for Ionization in
Neutral Gas Galaxies) images
table2.dat 89 24 Properties of the ELdots (emission-line
point sources) in J0403-43
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See also:
J/ApJS/165/307 : Survey for Ionization in Neutral Gas Galaxies (Meurer+, 2006)
VIII/73 : HI Parkes All Sky Survey Catalogue (HIPASS) (Meyer+, 2004)
VIII/89 : Northern HI Parkes All Sky Survey Catalogue (HIPASS) (Wong+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- [WPM2010] Source name (JHHMM-DDa:ENN, where the name
vegore the colon (:) is the HIPASS name)
14- 15 I2 h RAh Right ascension (J2000)
17- 18 I2 min RAm Right ascension (J2000)
20- 23 F4.1 s RAs Right ascension (J2000)
25 A1 --- DE- Declination sign (J2000)
26- 27 I2 deg DEd Declination (J2000)
29- 30 I2 arcmin DEm Declination (J2000)
32- 33 I2 arcsec DEs Declination (J2000)
35- 37 I3 0.1nm EW Hα equivalent width (Å)
39- 42 F4.1 --- r/r25 Number of times beyond the 25th magnitude
elliptical isophote the source lies
44- 48 F5.2 10-19W/m2 Flux Emission-line flux of the source measured
from SINGG image (10-16erg/cm2/s)
50- 53 F4.2 10-19W/m2 e_Flux rms uncertainty on Flux
55 A1 --- l_Rmag Limit flag on Rmag
56- 60 F5.2 mag Rmag R-band continuum magnitude measured from
SINGG image (AB)
62- 66 F5.3 mag e_Rmag ? rms uncertainty on Rmag
68- 72 A5 --- Run Observing run identification for
spectroscopic follow-up, if applicable (1)
74- 80 A7 --- Line Emission-line spectroscopically confirmed
to fall within the SINGG narrow band (2)
82- 85 A4 --- Morph Morphological classification (3)
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Note (1): HST04 is imaging with the high-resolution channel, and in the case of
J2352-52, revealed an obvious background galaxy.
Exposure times and HST run information are given in Werk et al. (2008).
Note (2): Emission lines as follows:
Halpha = star formation associated with the SINGG galaxy (outer-HII)
[O III] = falling within the Hα bandpass indicates a source
redshift of approximately 0.3
[O II] = a redshift of 0.76
Hbeta = a redshift of ∼0.4
Note (3): Morphological classification as follows:
Solo = solitary system
Comp = having companions
Int = interacting
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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 --- [WPM2010] Source name (JHHMM-DDa:ENN)
14- 15 I2 h RAh Right ascension (J2000)
17- 18 I2 min RAm Right ascension (J2000)
20- 23 F4.1 s RAs Right ascension (J2000)
25 A1 --- DE- Declination sign (J2000)
26- 27 I2 deg DEd Declination (J2000)
29- 30 I2 arcmin DEm Declination (J2000)
32- 35 F4.1 arcsec DEs Declination (J2000)
37- 39 I3 0.1nm EW Equivalent width (Hα)
41- 43 F3.1 --- r/r25 Number of times beyond the 25th magnitude
elliptical isophote the source lies
45- 49 F5.2 10-19W/m2 Flux Emission-line flux of the source measured
from SINGG image (10-16erg/cm2/s)
51- 54 F4.2 10-19W/m2 e_Flux rms uncertainty on Flux
56 A1 --- l_Rmag Limit flag on Rmag
57- 61 F5.2 mag Rmag R-band continuum magnitude measured from
SINGG image (AB)
63- 67 F5.3 mag e_Rmag ? rms uncertainty on Rmag
69- 73 F5.2 mag FUV ? GALEX FUV magnitude (AB) of the source
closest to the SINGG ELdot corrected
for Galactic extinction (1)
75- 78 F4.2 mag e_FUV ? rms uncertainty on FUV
80- 84 F5.2 mag F-N ? FUV-NUV color index (1)
86- 89 F4.2 mag e_F-N ? rms uncertainty on FUV-NUV
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Note (1): due to resolution discrepancies between SINGG images (1.5") and
GALEX images (4.5") multiple ELdots are detected as single sources in the
GALEX images. We have delineated affected sources by the horizontal lines in
the table. The GALEX image for J0403-43 comes from the Nearby Galaxy Atlas
(NGA), and has FUV and NUV exposure times of 2370s.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 27-Apr-2012