J/MNRAS/432/998 Kinematics of Arp 270 (NGC 3395) (Zaragoza-Cardiel+, 2013)
Kinematics of Arp 270: gas flows, nuclear activity, and two modes of star
formation.
Zaragoza-Cardiel J., Font-Serra J., Beckman J.E., Blasco-Herrera J.,
Garcia-Lorenzo B., Camps A., Gonzalez-Martin O., Ramos Almeida C.,
Loiseau N., Gutierrez L.
<Mon. Not. R. Astron. Soc. 432, 998 (2013)>
=2013MNRAS.432..998Z 2013MNRAS.432..998Z
ADC_Keywords: Galaxies, nearby ; H II regions
Keywords: stars: formation - HII regions - galaxies: active -
galaxies: interactions - galaxies: kinematics and dynamics -
galaxies: starburst
Abstract:
We have observed the Arp 270 system (NGC 3395 and NGC 3396) in
Hα emission using the Galaxy Hα Fabry-Perot spectrometer
on the 4.2m William Herschel Telescope (La Palma). In NGC 3396, which
is edge-on to us, we detect gas inflow towards the centre, and also
axially confined opposed outflows, characteristic of galactic
superwinds, and we go on to examine the possibility that there is a
shrouded AGN in the nucleus. The combination of surface brightness,
velocity and velocity dispersion information enabled us to measure the
radii, FWHM, and the masses of 108 HII regions in both galaxies.
Objects:
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RA (2000) DE Designation(s)
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10 49 50.12 +32 58 58.2 Arp 270 = NGC 3395
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
regions.dat 64 108 HII regions properties (tablea1 of the paper)
list.dat 93 4 List of FITS files
fits/* . 4 Individual FITS files
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See also:
J/AJ/125/1696 : Star-forming knots in NGC 3395/3396 (Hancock+, 2003)
Byte-by-byte Description of file: regions.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1/108] Running number in catalog
5- 6 I2 h RAh Hour of Right Ascension (J2000)
8- 9 I2 min RAm Minute of Right Ascension (J2000)
11- 15 F5.2 s RAs Second of Right Ascension (J2000)
17 A1 --- DE- Sign of Declination (J2000)
18- 19 I2 deg DEd Degree of Declination (J2000)
21- 22 I2 arcmin DEm Arcminute of Declination (J2000)
24- 28 F5.2 arcsec DEs Arcsecond of Declination (J2000)
30- 32 I3 pc R Radius of the HII region (scale=100pc/arcsec,
distance=21.8Mpc)
34- 38 F5.2 [10-7W] logLHa Log of Hα luminosity
40- 43 F4.2 cm-3 ne Electron density
45- 49 F5.2 km/s sigma Velocity dispersion σ
51- 54 F4.2 Msun MHII Ionized gas mass
56- 59 F4.2 Msun Mgas Total gas mass
61- 64 F4.2 Msun Mvir Virial mass
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 24 F5.3 arcsec/pix Scale Scale of the image
26- 29 I4 pix Nx [1024] Number of pixels along X-axis
30 A1 --- --- [x]
31- 34 I4 pix Ny [1024] Number of pixels along Y-axis
35 A1 --- --- [x]
36- 37 I2 pix Nz [48]? Number of slices
39- 44 I6 GHz Freq1 ? Lower value of frequency interval for
datacube (around Hα)
46- 51 I6 GHz Freq2 ? Upper value of frequency interval for
datacube (around Hα)
53- 59 F7.4 GHz DFreq [12.3058]? Resolution on DFrep
61- 93 A33 --- FileName Name of FITS file in subdirectory fits
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Acknowledgements:
J. Zaragoza-Cardiel, jzc(at)iac.es
(End) Patricia Vannier [CDS] 20-Mar-2013