J/A+A/663/A28 Molecular gas prop. in local Seyfert 2 gal. (Salvestrini+, 2022)
The molecular gas properties in local Seyfert 2 galaxies.
Salvestrini F., Gruppioni C., Hatziminaoglou E., Pozzi F., Vignali C.,
Casasola V., Paladino R., Aalto S., Andreani P., Marchesi S., Stanke T.
<Astron. Astrophys. 663, A28 (2022)>
=2022A&A...663A..28S 2022A&A...663A..28S (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, Seyfert ; Active gal. nuclei ; Radio sources ;
Spectroscopy ; Carbon monoxide
Keywords: galaxies: Seyfert - galaxies: ISM - galaxies: nuclei
Abstract:
We present a multiwavelength study of the molecular gas properties of
a sample of local Seyfert 2 galaxies to assess if, and to what extent,
the presence of an active galactic nucleus (AGN) can affect the
interstellar medium (ISM) properties in a sample of 33 local Seyfert 2
galaxies.
We compare the molecular gas content (MH2_) derived from new and
archival low-J CO line measurements of a sample of AGN and a control
sample of star-forming galaxies (SFGs).
Both the AGN and the control sample are characterized in terms of
host-galaxy properties, for example stellar and dust masses (M* and
Mdust, respectively) and the star formation rate (SFR).
We also investigate the effect of AGN activity on the emission of
polycyclic aromatic hydrocarbon (PAH) molecules in the mid-infrared
(MIR), a waveband where the dust-reprocessed emission from the
obscured AGN contributes the most.
The AGN hosted in less massive galaxies (i.e., M*<1010.5M☉;
Mdust<107.5M☉) show larger molecular gas contents with respect
to SFGs that have the same stellar and dust masses.
When comparing their depletion times (tdep∝MH2/SFR), AGN
show tdep∼0.3-1.0Gyr, similar to the times observed in the control
sample of SFGs.
Seyfert 2 galaxies show fainter PAH luminosity the larger the
dominance of the nuclear activity in the MIR.
We find no clear evidence for a systematic reduction in the molecular
gas reservoir at galactic scales in Seyfert galaxies with respect to
SFGs. This is in agreement with recent studies that show that
molecular gas content is only reduced in sub-kiloparsec-sized regions,
where emission from the accreting supermassive black hole dominates.
Nonetheless, we show that the impact of AGN activity on the ISM is
clearly visible as a suppression of the PAH luminosity.
Description:
Reduced spectra (APEX) of 23 nearby Seyfert 2 galaxies. Data were
analysed with the aim of providing complete and homogeneous
measurements of the molecular gas content in a well defined sample of
AGN. Details about the calibration procedures for the spectra are
provided in the dedicated sections of the paper.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
sources.dat 74 23 List of studied galaxies
cgcg381.dat 23 120 CGCG 381-051 CO(2-1) line profile from APEX
eso33.dat 23 110 ESO 033-G002 CO(2-1) line profile from APEX
ic5063.dat 23 120 IC 5063 CO(2-1) line profile from APEX
irasf014.dat 23 240 IRAS F01475-0740 CO(2-1) line profile from APEX
irasf048.dat 23 120 IRAS F04385-0828 CO(2-1) line profile from APEX
irasf154.dat 23 120 IRAS F15480-0344 CO(2-1) line profile from APEX
mcg00290.dat 23 120 MCG-03-34-064 CO(2-1) line profile from APEX
mcg03340.dat 23 120 MCG-03-58-007 CO(2-1) line profile from APEX
mcg03580.dat 23 120 MCG+00-29-023 CO(2-1) line profile from APEX
mrk463.dat 23 120 Mrk 0463 CO(2-1) line profile from APEX
mrk897.dat 23 120 Mrk 0897 CO(2-1) line profile from APEX
ngc0424.dat 23 113 NGC 0424 CO(2-1) line profile from APEX
ngc1125.dat 23 120 NGC 1125 CO(2-1) line profile from APEX
ngc1320.dat 23 111 NGC 1320 CO(2-1) line profile from APEX
ngc2992.dat 23 120 NGC 2992 CO(2-1) line profile from APEX
ngc4602.dat 23 120 NGC 4602 CO(2-1) line profile from APEX
ngc5506.dat 23 120 NGC 5506 CO(2-1) line profile from APEX
ngc5953.dat 23 120 NGC 5953 CO(2-1) line profile from APEX
ngc5995.dat 23 120 NGC 5995 CO(2-1) line profile from APEX
ngc6890.dat 23 120 NGC 6890 CO(2-1) line profile from APEX
ngc7496.dat 23 240 NGC 7496 CO(2-1) line profile from APEX
ngc7674.dat 23 120 NGC 7674 CO(2-1) line profile from APEX
tololo12.dat 23 119 TOLOLO 1238-364 CO(2-1) line profile from APEX
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Byte-by-byte Description of file: sources.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- Name Galaxy name
20- 21 I2 h RAh Right ascension (J2000)
23- 24 I2 min RAm Right ascension (J2000)
26- 30 F5.2 s RAs Right ascension (J2000)
32 A1 --- DE- Declination sign (J2000)
33- 34 I2 deg DEd Declination (J2000)
36- 37 I2 arcmin DEm Declination (J2000)
39- 43 F5.2 arcsec DEs Declination (J2000)
46- 57 A12 --- FileName Name of the file with spectra data
59- 74 A16 --- SName Simbad name
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Byte-by-byte Description of file: [ceimnt]*.dat
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Bytes Format Units Label Explanations
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1- 12 F12.6 km/s Vel Velocity
14- 23 E10.5 mK Ta ?=-999 Antenna temperature
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Acknowledgements:
Francesco Salvestrini, francesco.salvestrini(at)inaf.it
(End) Francesco Salvestrini [Florence, Italy], P. Vannier [CDS] 05-May-2022