J/MNRAS/465/3461 Halpha maps of 3 LIRGS (Zaragoza-Cardiel+, 2017)
Kinematics of the ionized and molecular gas in nearby luminous infrared
interacting galaxies.
Zaragoza-Cardiel J., Beckman J.E., Font J., Rosado M., Camps-Farina A.,
Borlaff A.
<Mon. Not. R. Astron. Soc. 465, 3461 (2017)>
=2017MNRAS.465.3461Z 2017MNRAS.465.3461Z (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; H II regions ; Molecular clouds ;
Velocity dispersion
Keywords: galaxies: interactions - galaxies: ISM -
galaxies: kinematics and dynamics - galaxies: starburst -
galaxies: stars formation
Abstract:
We have observed three luminous infrared galaxy systems (LIRGS) which
are pairs of interacting galaxies, with the Galaxy Hα
Fabry-Perot system (GHαFaS) mounted on the 4.2m William
Herschel Telescope at the Roque de los Muchachos Observatory, and
combined the observations with the Atacama Large Millimeter Array
(ALMA) observations of these systems in CO emission to compare the
physical properties of the star formation regions and the molecular
gas clouds, and specifically the internal kinematics of the star
forming regions. We identified 88 star forming regions in the
H$α$ emission data-cubes, and 27 molecular cloud complexes in the
CO emission data-cubes. The surface densities of the star formation
rate and the molecular gas are significantly higher in these systems
than in non-interacting galaxies and the Galaxy, and are closer to the
surface densities of the star formation rate and the molecular gas of
extreme star forming galaxies at higher redshifts. The large values of
the velocity dispersion also show the enhanced gas surface density.
The HII regions are situated on the ΣSFR-σv
envelope, and so are also in virial equilibrium. Since the virial
parameter decreases with the surface densities of both the star
formation rate and the molecular gas, we claim that the clouds
presented here are gravitationally dominated rather than being in
equilibrium with the external pressure.
Description:
We present Hα data cubes observations of Arp 186, Arp 236, and
Arp 298 from the ionized component of the interstellar medium. We also
include the properties of the identified HII regions and Giant
Molecular Clouds. The molecular component is derived using
observations of those systems from the ALMA archive.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablehii.dat 114 88 Properties of HII regions (tablea2, part 1)
tablemol.dat 102 27 Properties of GMCs (tablea2, part 2)
list.dat 128 12 List of fits files
fits/* . 12 Individual fits files
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Byte-by-byte Description of file: tablehii.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Gal Name of the galaxy
9- 10 I2 --- Num Consecutive number in catalog
12- 13 I2 h RAh Right Ascension (J2000)
15- 16 I2 min RAm Right Ascension (J2000)
18- 21 F4.1 s RAs [0/60] Right Ascension (J2000)
23 A1 --- DE- Declination sign (J2000)
24- 25 I2 deg DEd Declination (J2000)
27- 28 I2 arcmin DEm Declination (J2000)
30- 33 F4.1 arcsec DEs Declination (J2000)
35- 40 F6.3 [10-7W] logLHa Log of Hα luminosity
42- 46 F5.3 [10-7W] e_logLHa Log of Hα luminosity error
48- 53 F6.3 Msun/yr SFR Log of Star formation rate
55- 59 F5.3 Msun/yr e_SFR Log of Star formation rate error
61- 63 I3 pc R Radius
65- 66 I2 pc e_R Radius error
68- 72 F5.2 [Msun/yr.kpc+2] SigmaSFR ?=- Log of Star formation rate
surface density
74- 77 F4.2 [Msun/yr.kpc+2] e_SigmaSFR ? Log of Star formation rate surface
density error
79- 82 F4.2 Msun MHII Log of Ionized gas mass
84- 87 F4.2 Msun e_MHII Log of Ionized gas mass error
89 A1 --- l_SigmaV Limit flag on SigmaV
90- 93 F4.1 km/s SigmaV Velocity dispersion
95- 98 F4.1 km/s e_SigmaV ? Velocity dispersion error
100-105 F6.1 --- alpVir ? Virial parameter
108-114 F7.2 --- e_alpVir ? Virial parameter error
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Byte-by-byte Description of file: tablemol.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Gal Name of the galaxy
9- 10 I2 --- Num [1/23] Consecutive number in catalog
12- 13 I2 h RAh Right Ascension (J2000)
15- 16 I2 min RAm Right Ascension (J2000)
18- 21 F4.1 s RAs [0/60] Right Ascension (J2000)
23 A1 --- DE- Declination sign (J2000)
24- 25 I2 deg DEd Declination (J2000)
27- 28 I2 arcmin DEm Declination (J2000)
30- 33 F4.1 arcsec DEs Declination (J2000)
35- 39 F5.3 [K.km/s.pc+2] logLCO Log of CO luminosity
41- 45 F5.3 [K.km/s.pc+2] e_logLCO Log of CO luminosity error
47- 51 F5.3 Msun Mmol Log of Molecular gas mass
53- 57 F5.3 Msun e_Mmol Log of Molecular gas mass error
59- 63 F5.1 pc R Radius
65- 68 F4.1 pc e_R Radius error
70- 73 F4.2 Msun/pc+2 Sigmamol Molecular gas surface density
75- 78 F4.2 Msun/pc+2 e_Sigmamol Molecular gas surface density error
80 A1 --- l_SigmaV limit flag on SigmaV
81- 84 F4.1 km/s SigmaV Velocity dispersion
86- 88 F3.1 km/s e_SigmaV ? Velocity dispersion error
91- 95 F5.3 --- alpVir ? Virial parameter
97-102 F6.4 --- e_alpVir ? Virial parameter error
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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- 23 I4 --- Nx Number of pixels along X-axis
25- 28 I4 --- Ny Number of pixels along Y-axis
30- 31 I2 --- Nz ? Number of slices for the datacubes
33- 39 F7.2 km/s bVel ? Lower value of velocity interval
for the datacubes
41- 47 F7.2 km/s BVel ? Upper value of velocity interval
for the datacubes
49- 56 F8.5 km/s dVel ? Velocity resolution for the datacubes
58- 63 I6 Kibyte size Size of FITS file
65- 87 A23 --- FileName Name of FITS file, in subdirectory fits
89-128 A40 --- Title Title of the FITS file
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Acknowledgements:
Javier Zaragoza-Cardiel, javier.zaragoza(at)astro.unam.mx
(End) Patricia Vannier [CDS] 17-Nov-2016