J/MNRAS/407/2475 Ionized gas in E/S0 galaxies with dust lanes (Finkelman+, 2010)
Ionized gas in E/S0 galaxies with dust lanes.
Finkelman I., Brosch N., Funes J.G., Kniazev A.Y., Vaisanen P.
<Mon. Not. R. Astron. Soc., 407, 2475-2500 (2010)>
=2010MNRAS.407.2475F 2010MNRAS.407.2475F
ADC_Keywords: Galaxies, photometry ; Photometry, UBVRI ; Photometry, H-alpha ;
Photometry, infrared ; Morphology ; Spectroscopy
Keywords: dust, extinction - galaxies: elliptical and lenticular, cD -
galaxies: ISM
Abstract:
We report the results of multicolour observations of 30 E/S0 galaxies
with dust lanes. For each galaxy we obtained broad-band images and
narrow-band images using interference filters isolating the
Hα+[NII] emission lines to derive the amount and morphology of
dust and ionized gas. To improve the wavelength coverage we retrieved
data from the Sloan Digital Sky Survey and Two Micron All Sky Survey
and combined these with our data. Ionized gas is detected in 25
galaxies and shows in most cases a smooth morphology, although knots
and filamentary structure are also observed in some objects.
Description:
We present broad-band U, B, V, R, I and Hα narrow-band
observations of 30 galaxies acquired at the Mt. Graham International
Observatory (MGIO), the South African Astronomical Observatory (SAAO)
and the Wise Observatory (WO). Observations with the 1.8-m Vatican
Advanced Technology Telescope (VATT) at the MGIO were performed in two
runs in 2004 June and 2006 May using the Loral CCD at the aplanatic
f/9 Gregorian focus. A second set of observations was performed at the
SAAO 1.9-m telescope in Sutherland, South Africa, in 2008 November.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 59 30 Global parameters for galaxies in our sample
table3.dat 109 60 Observation log
table4.dat 47 30 Ionized gas aperture properties
table6.dat 108 36 UBVRIJHK photometry
table7.dat 108 24 UBVrizJHK photometry
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See also:
VII/155 : Third Reference Cat. of Bright Galaxies (RC3) (de Vaucouleurs+ 1991)
VII/237 : HYPERLEDA. I. Catalog of galaxies (Paturel+, 2003)
VII/238 : HYPERLEDA. II. Homogenized HI data (Paturel+, 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Galaxy name
12- 13 I2 h RAh Right ascension (J2000)
15- 16 I2 min RAm Right ascension (J2000)
18- 19 I2 s RAs Right ascension (J2000)
21 A1 --- DE- Declination sign (J2000)
22- 23 I2 deg DEd Declination (J2000)
25- 26 I2 arcmin DEm Declination (J2000)
28- 29 I2 arcsec DEs Declination (J2000)
31- 39 A9 --- MType Morphological type (RC3/HyperLEDA)
41- 45 F5.2 mag BT0 Integrated blue luminosity
47- 51 I5 km/s HV Heliocentric velocity
53- 55 F3.1 arcmin Size1 Optical size
56 A1 --- --- [x]
57- 59 F3.1 arcmin Size2 Optical size
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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 Galaxy name
12- 21 A10 "DD/MM/YYYY" Date Observation Date
23- 26 A4 --- Obs Observatory
28- 31 I4 s t(U) U exposure time
33 I1 --- o_t(U) ? Number of individual frames used in U band
36- 39 I4 s t(B) B exposure time
41 I1 --- o_t(B) ? Number of individual frames used in B band
44- 46 I3 s t(V) V exposure time
48 I1 --- o_t(V) ? Number of individual frames used in V band
52- 54 I3 s t(R) R exposure time
56 I1 --- o_t(R) ? Number of individual frames used in R band
60- 62 I3 s t(I) I exposure time
64 I1 --- o_t(I) ? Number of individual frames used in I band
68- 71 I4 s t(Ha) Hα-band exposure time
73 I1 --- o_t(Ha) ? Number of individual frames used in Ha band
76- 85 A10 --- Filter Narrow-band filter
87- 89 F3.1 arcsec FWHMU U seeing
91- 93 F3.1 arcsec FWHMB B seeing
95- 97 F3.1 arcsec FWHMV V seeing
99-101 F3.1 arcsec FWHMR R seeing
103-105 F3.1 arcsec FWHMI I seeing
107-109 F3.1 arcsec FWHMHa Hα seeing
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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- 10 A10 --- Name Galaxy name
11 A1 --- n_D25G [a] No Hα+[NII] emission (1)
13- 15 F3.1 arcmin D25G Galaxy apparent major axis diameter
17- 19 I3 deg PA25G Galaxy major axis position angle
21- 24 F4.2 --- (b/a)G Galaxy axial ratio
26- 29 F4.2 arcmin D2 HII disc apparent major axis diameter
31- 33 I3 deg PA2 HII disc major axis position angle
35- 38 F4.2 --- (b/a)2 HII disc axial ratio
40- 42 F3.1 kpc R Projected radius of the disc
44- 47 F4.2 --- D2/DG Ratio of the disc-to-galaxy isophotal diameter
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Note (1): 'a': no apparent Hα+[NII] extended emission and therefore
the aperture is selected to measure the possible central line emission
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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- 10 A10 --- Name Galaxy name
12 I1 --- ap [1/2] Aperture in ellipse defined by:
1 = HyperLEDA, 2 = table4 (G1)
14- 18 F5.2 mag Bmag B magnitude
21- 24 F4.2 mag e_Bmag rms uncertainty on Bmag
27- 31 F5.2 mag U-B ?=9.99 rms uncertainty on U-B
33- 36 F4.2 mag e_U-B ?=9.99 U-B colour error
39- 42 F4.2 mag B-V rms uncertainty on B-V
45- 48 F4.2 mag e_B-V B-V colour error
51- 54 F4.2 mag V-R rms uncertainty on V-R
57- 60 F4.2 mag e_V-R V-R colour error
63- 66 F4.2 mag R-I rms uncertainty on R-I
69- 72 F4.2 mag e_R-I R-I colour error
75- 78 F4.2 mag R-J ?=9.99 rms uncertainty on R-J
81- 84 F4.2 mag e_R-J ?=9.99 R-J colour error
87- 90 F4.2 mag J-H ?=9.99 rms uncertainty on J-H
93- 96 F4.2 mag e_J-H ?=9.99 J-H colour error
99-102 F4.2 mag H-K ?=9.99 rms uncertainty on H-K
105-108 F4.2 mag e_H-K ?=9.99 H-K colour error
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Galaxy name
11 A1 --- n_ap [*] special aperture for NGC4374 (1)
13 I1 --- ap [1/2] Aperture: 1=HyperLEDA, 2=table4 (G1)
15- 19 F5.2 mag Bmag B magnitude
22- 25 F4.2 mag e_Bmag rms uncertainty on Bmag
27- 31 F5.2 mag U-B U-B colour index
33- 36 F4.2 mag e_U-B rms uncertainty on U-B
39- 42 F4.2 mag B-V B-V colour index
45- 48 F4.2 mag e_B-V rms uncertainty on B-V
51- 54 F4.2 mag r-i ?=9.99 SDSS r-i colour index
57- 60 F4.2 mag e_r-i ?=9.99 rms uncertainty on r-i
63- 66 F4.2 mag i-z ?=9.99 SDSS i-z colour index
69- 72 F4.2 mag e_i-z ?=9.99 rms uncertainty on i-z
75- 78 F4.2 mag R-J ?=9.99 R-J colour index
81- 84 F4.2 mag e_R-J ?=9.99 rms uncertainty on R-J
87- 90 F4.2 mag J-H ?=9.99 J-H colour index
93- 96 F4.2 mag e_J-H ?=9.99 rms uncertainty on J-H
99-102 F4.2 mag H-K ?=9.99 H-K colour index
105-108 F4.2 mag e_H-K ?=9.99 rms uncertainty on H-K
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Note (1): the asterisk (*) for NGC4374 indicates that the total flux is
measured within an elliptical aperture of 1.5'.
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Global Notes:
Note (G1): For each galaxy the magnitudes are measured from the
total flux enclosed in an elliptical region as follows:
1 = elliptical region as defined in the RC3/HyperLEDA database
2 = region as defined in table4.
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 07-Jan-2011