J/A+A/658/A188 PHANGS-MUSE sample HII regions catalog (Santoro+, 2022)
PHANGS-MUSE: The HII region luminosity function of local star-forming galaxies.
Santoro F., Kreckel K., Belfiore F., Groves B., Congiu E., Thilker D.A.,
Blanc G.A., Schinnerer E., Ho I-T., Kruijssen J.M.D., Meidt S.,
Klessen R.S., Schruba A., Querejeta M., Pessa I., Chevance M., Kim J.,
Emsellem E., McElroy R., Barnes A.T., Bigiel F., Boquien M., Dale D.A.,
Glover S.C.O., Grasha K., Lee J., Leroy A.K., Pan H.-A., Rosolowsky E.,
Saito T., Sanchez-Blazquez P., Watkins E.J., Williams T.G.
<Astron. Astrophys. 658, A188 (2022)>
=2022A&A...658A.188S 2022A&A...658A.188S (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; H II regions ; Photometry, H-alpha ;
Photometry, H-beta
Keywords: ISM: HII regions - ISM: structure - galaxies: ISM -
galaxies: star formation - galaxies: evolution - galaxies: spirals
Abstract:
We use an unprecedented sample of about 23000 HII regions detected at
an average physical resolution of 67pc in the PHANGS-MUSE sample to
study the extragalactic HII region Hα luminosity function (LF).
Our observations probe the star-forming disk of 19 nearby spiral
galaxies with low inclination and located close to the star formation
main sequence at z=0. The mean LF slope in our sample is =1.73 with a
σ of 0.15. We find that α decreases with the galaxy's
star formation rate surface density {SIGMA}SFR and argue that this
is driven by an enhanced clustering of young stars at high gas surface
densities. Looking at the HII regions within single galaxies we find
that no significant variations occur between the LF of the inner and
outer part of the star-forming disk, whereas the LF in the spiral arm
areas is shallower than in the inter-arm areas for six out of the 13
galaxies with clearly visible spiral arms. We attribute these
variations to the spiral arms increasing the molecular clouds
arm-inter-arm mass contrast and find suggestive evidence that they
are more evident for galaxies with stronger spiral arms. Furthermore,
we find systematic variations in α between samples of HII
regions with high and low ionization parameter q and argue that they
are driven by the aging of HII regions.
Description:
For a complete and detailed description of the PHANGS-MUSE
sample and data we redirect the reader to Emsellem et al. (2021, in
prep., arXiv:2110.03708), while in this section we summarize the
overall properties of the sample and provide essential details of the
data reduction and analysis pipelines.
The PHANGS-MUSE sample includes 19 nearby (D<20Mpc) star-forming
galaxies (Sa-Sc Hubble morphological type) with relatively low
inclination (i≲55 degrees). We summarize their main properties in
Table 1.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 88 19 Main properties of the galaxies in the
PHANGS-MUSE sample
catalog.dat 104 23301 PHANGS-MUSE HII regions catalog
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Galaxy Galaxy name
9- 18 F10.6 deg RAdeg Right ascension of the galaxy center (J2000)
20- 29 F10.6 deg DEdeg Declination of the galaxy center (J2000)
31- 34 A4 --- Morph Hubble Morphological type (1)
36- 40 F5.2 Mpc Dist Distance (2)
42- 45 F4.1 deg i Inclination angle (3)
47- 51 F5.1 deg PA Position angle (3)
53- 57 F5.2 [Msun] logM* Total stellar mass
59- 63 F5.2 Msun/yr SFR Total star formation rate (4)
65- 69 F5.2 --- DSFMS Offset fro the star formation main sequence
71- 73 I3 arcsec R25 B-band isophotal radius (1)
75- 78 F4.2 arcsec FWHM-PSF Angular resolution of the cop data (5)
80- 83 F4.1 pc/arcsec Scale Scaling factor
85- 88 F4.2 --- rmax maximum deprojected galactocentric radius
in units of R25
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Note (1): From HyperLEDA, Makarov et al. (2014A&A...570A..13M 2014A&A...570A..13M)
Note (2): From Anand et al. (2021MNRAS.501.3621A 2021MNRAS.501.3621A)
Note (3): From Lang et al. (2020ApJ...897..122L 2020ApJ...897..122L)
Note (4): From Leroy et al. (2021, in prep., arXiv:2104.07739)
Note (5): From Emsellem et al. (2021, in prep., arXiv:2110.03708)
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Galaxy Name of the galaxy hosting the HII region
9- 12 I4 --- Region Unique ID for the HII region
14- 23 F10.6 deg RAdeg Right ascension of the geometrical centre
of the HII region (J2000)
25- 34 F10.6 deg DEdeg Declination of the geometrical centre of
the HII region (J2000)
36- 41 F6.2 arcsec deprojDist Deprojected distance from galaxy centre
43- 50 I8 10-23W/m2 FHa6562 Integrated Flux of the Halpha 6562Å
emission line (in 10-20erg/cm2/s)
52- 56 I5 10-23W/m2 e_FHa6562 Error of FHa6562 (in 10-20erg/cm2/s)
58- 65 I8 10-23W/m2 FHb4861 Integrated Flux of the Hbeta 4861Å
emission line (in 10-20erg/cm2/s)
67- 71 I5 10-23W/m2 e_FHb4861 Error of FHb4861 (in 10-20erg/cm2/s)
73- 81 I9 10-23W/m2 FHa6562corr Integrated Flux of the Halpha 6562Å
emission line corrected for dust
extinction (in 10-20erg/cm2/s)
83- 88 I6 10-23W/m2 e_FHa6562corr Error of FHa6562corr
(in 10-20erg/cm2/s)
90- 95 F6.3 --- logqD91 ? Logarithm of the Ionization parameter q
(Diaz et al., 1991MNRAS.253..245D 1991MNRAS.253..245D)
97-102 F6.3 --- e_logqD91 []? Error of logqD91
104 I1 --- Env [1/3] Flag for galactic environment (1)
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Note (1): Flag for galactic environment as follows:
1 = bar
2 = spiral arm
3 = inter-arm (galaxies with spiral arms)/disc (galaxies with no spiral arms)
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Acknowledgements:
Francesco Santoro, santoro(at)mpia-hd.mpg.de
(End) Patricia Vannier [CDS] 19-Nov-2021