J/A+A/577/A135 Nearby AGN 12CO and Hα maps (Casasola+, 2015)
The resolved star-formation relation in nearby active galactic nuclei.
Casasola V., Hunt L., Combes F., Garcia-Burillo S.
<Astron. Astrophys. 577, A135 (2015)>
=2015A&A...577A.135C 2015A&A...577A.135C
ADC_Keywords: Active gal. nuclei ; Carbon monoxide
Keywords: galaxies: ISM - galaxies: spiral - ISM: active - ISM: molecules -
stars: formation
Abstract:
We present an analysis of the relation between star formation rate
(SFR) surface density (ΣSFR) and mass surface density of
molecular gas (ΣH2), commonly referred to as the
Kennicutt-Schmidt (K-S) relation, at its intrinsic spatial scale, i.e.
the size of giant molecular clouds (∼10-150pc), in the central,
high-density regions of four nearby low-luminosity active galactic
nuclei (AGN). These are AGN extracted from NUclei of GAlaxies (NUGA)
survey. This study is aimed at investigating the correlations and
slopes of the K-S relation, as a function of spatial resolution and of
different 12CO emission lines used to trace ΣH2, and testing
its validity in the high-density central regions of spiral galaxies.
We used interferometric IRAM 12CO(1-0) and 12CO(2-1), and SMA
12CO(3-2) emission line maps to derive ΣH2 and HS
T-Hα to estimate ΣSFR.
Description:
12CO(1-0) and 12CO(2-1) line intensity maps are part of the NUGA
survey. NUGA observations have been carried out with 6 antennas of the
PdBI in the ABCD configuration of the array and with the IRAM 30m
single dish telescope.
For NGC 4569 and NGC 4826, we have also 12CO(3-2) line intensity
maps obtained with the Submillimeter Array (SMA) in its compact
configuration with seven working antennas.
We retrieved Hα emission-line images from the Hubble Legacy
Archive (HLA) that makes available HST WFPC2 observations of our
galaxy sample.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 232 20 List of FITS maps for galaxies NGC3627, NGC4569,
NGC4579 and NGC4826
maps/* . 20 Individual FITS maps
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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- 22 F3.1 arcsec/pix Scale [0.8/2.5] Scale of the image
24- 25 I2 pix Nx [12/25] Number of pixels along X-axis
26 A1 --- --- [x]
27- 28 I2 pix Ny [12/25] Number of pixels along Y-axis
30- 41 A12 --- FileName Name of FITS file, in subdirectory maps
43- 51 A9 --- Param Parameter mapped and line used (1)
53- 64 A12 --- Units Units of the mapped parameter
66- 68 I3 pc Res [17/190] Spatial resolution of the map
70- 76 A7 --- Gal Galaxy name
78-232 A155 --- Title Title of the file
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Note (1): parameters are SH2 (surface density of H2) or SSFR (surface
star formation rate), with an indication of the line used
(CO10=12CO(1-0), CO21=12CO(2-1), CO32=12CO(3-2), Ha=Hα)
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Acknowledgements:
Viviana Casasola, casasola(at)arcetri.astro.it
INAF-Osservatorio Astrofisico di Arcetri, Italy
(End) Viviana Casasola [INAF], Patricia Vannier [CDS] 09-Mar-2015