J/MNRAS/445/1412 HII regions and GMC in the Antennae (Zaragoza-Cardiel+, 2014)
Two physical regimes for the giant HII regions and giant molecular clouds in
the Antennae galaxies.
Zaragoza-Cardiel J., Font J., Beckman J.E., Garcia-Lorenzo B.,
Erroz-Ferrer S., Gutierrez L.
<Mon. Not. R. Astron. Soc. 445, 1412 (2014)>
=2014MNRAS.445.1412Z 2014MNRAS.445.1412Z
ADC_Keywords: Galaxies, nearby ; H II regions ; Molecular clouds ;
Velocity dispersion
Keywords: stars: formation - HII regions - galaxies: interactions -
galaxies: kinematics and dynamics - galaxies: starburst
Abstract:
We have combined observations of the Antennae galaxies from the radio
interferometer ALMA (Atacama Large Millimeter/submillimeter Array) and
from the optical interferometer GHαFaS (Galaxy Hα
Fabry-Perot System). The two sets of observations have comparable
angular and spectral resolutions, enabling us to identify 142 giant
molecular clouds (GMCs) and 303 HII regions. We have measured, and
compared, their basic physical properties (radius, velocity
dispersion, luminosity).
Description:
We present two sets of observations of the Antennae: data cubes of
emission in Hα from the ionized component of the interstellar
medium and of emission in the CO(3-2) line from the molecular
component.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
gmc.dat 87 142 Molecular cloud properties (table A2 of the paper)
hiireg.dat 102 303 HII regions properties (table A1 of the paper)
list.dat 125 4 List of FITS files
fits/* . 4 Individual FITS files
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See also:
J/MNRAS/432/998 : Kinematics of Arp 270 (NGC 3395) (Zaragoza-Cardiel+, 2013)
Byte-by-byte Description of file: gmc.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Num [1/142] Consecutive number in catalog
5- 6 I2 h RAh Right Ascension (J2000)
8 I1 min RAm Right Ascension (J2000)
10- 13 F4.1 s RAs Right Ascension (J2000)
15 A1 --- DE- Declination sign (J2000)
16- 17 I2 deg DEd Declination (J2000)
19- 20 I2 arcmin DEm Declination (J2000)
22- 25 F4.1 arcsec DEs Declination (J2000)
27- 30 F4.2 [K.km/s.pc+2] logLCO Log of CO luminosity
32- 35 F4.2 [K.km/s.pc+2] e_logLCO Log of CO luminosity error
37- 39 I3 pc R Radius of molecular cloud
41- 42 I2 pc e_R Radius error
44- 47 F4.2 [Msun] logM Molecular H2 gas mass log(MH2)
49- 52 F4.2 [Msun] e_logM Molecular H2 gas mass error
54- 58 F5.1 Msun/pc3 rhoH2 Molecular gas density ρ(H2)
60- 63 F4.1 Msun/pc3 e_rhoH2 Molecular gas density error
65 A1 --- l_sigV Limit flag on sigV
66- 70 F5.2 km/s sigV Velocity dispersion σV
72- 75 F4.2 km/s e_sigV ? Velocity dispersion error
77- 80 F4.2 --- aVir ? Virial parameter αvir=M/Mvir
83- 86 F4.2 --- e_aVir ? Virial parameter error
87 A1 --- --- [0]
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Byte-by-byte Description of file: hiireg.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Num [1/303] Consecutive number in catalog
5- 6 I2 h RAh Right ascension (J2000)
8 I1 min RAm Right ascension (J2000)
10- 13 F4.1 s RAs Right ascension (J2000)
15 A1 --- DE- Declination sign (J2000)
16- 17 I2 deg DEd Declination (J2000)
19- 20 I2 arcmin DEm Declination (J2000)
22- 25 F4.1 arcsec DEs Declination (J2000)
27- 32 F6.3 [10-7W] logLHa Log of Hα luminosity (erg/s)
34- 38 F5.3 [10-7W] e_logLHa Log of Hα luminosity error (erg/s)
40- 46 E7.2 Msun/yr SFR Star formation rate
48- 50 I3 pc R Radius of HII region
52- 53 I2 pc e_R Radius error
55- 58 F4.2 [Msun] logM Ionized gas mass log(MHII)
60- 63 F4.2 [Msun] e_logM Ionized gas mass error
65- 69 F5.3 Msun/pc3 rhoHII Ionized gas density ρ(HII)
71- 75 F5.3 Msun/pc3 e_rhoHII Ionized gas density error
77 A1 --- l_sigV Limit flag on sigV
78- 81 F4.1 km/s sigV Velocity dispersion
83- 86 F4.1 km/s e_sigV ? Velocity dispersion error
88- 93 F6.1 --- aVir ? Virial parameter αvir=M/Mvir
96-101 F6.1 --- e_aVir ? Virial parameter error
102 A1 --- --- [0]
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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 [0.197] Scale of the image
26- 29 I4 --- Nx [1024] Number of pixels along X-axis
31- 34 I4 --- Ny [1024] Number of pixels along Y-axis
36- 38 I3 --- Nz [144]? Number of slices for data cube
40- 46 I7 Kibyte size [4103/1179658] Size of FITS file
48- 85 A38 --- FileName Name of FITS file, in subdirectory fits
87-125 A39 --- Title Title of the FITS file
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Acknowledgements:
Javier Zaragoza-Cardiel, jzc(at)iac.es
History:
* 15-Oct-2014: from author (Javier Zaragoza Cardiel)
* 17-Nov-2014: hiireg.dat file corrected (from Javier Zaragoza Cardiel)
* 15-Mar-2017: hiireg.dat file corrected (from Javier Zaragoza Cardiel)
(End) Patricia Vannier [CDS] 14-Oct-2014