J/MNRAS/520/4902 The PHANGS-MUSE nebular catalogue (Groves+, 2023)
The PHANGS-MUSE nebular catalogue.
Groves B., Kreckel K., Santoro F., Belfiore F., Zavodnik E., Congiu E.,
Egorov O.V., Emsellem E., Grasha K., Leroy A., Scheuermann F.,
Schinnerer E., Watkins E.J., Barnes A.T., Bigiel F., Dale D.A.,
Glover S.C.O., Pessa I., Sanchez-Blazquez P., Williams T.G.
<Mon. Not. R. Astron. Soc. 520, 4902 (2023)>
=2023MNRAS.520.4902G 2023MNRAS.520.4902G (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, optical ; Interstellar medium; H II regions ; Abundances
Keywords: galaxies: ISM - H II regions - galaxies: abundances
Abstract:
Ionized nebulae provide critical insights into the conditions of the
interstellar medium (ISM). Their bright emission lines enable the
measurement of physical properties, such as the gas-phase metallicity,
across galaxy discs and in distant galaxies. The PHANGS-MUSE survey
has produced optical spectroscopic coverage of the central
star-forming discs of 19 nearby main-sequence galaxies. Here, we use
the Halpha morphology from this data to identify 30790 distinct
nebulae, finding thousands of nebulae per galaxy. For each nebula, we
extract emission line fluxes and, using diagnostic line ratios,
identify the dominant excitation mechanism. A total of 23244 nebulae
(75 per cent) are classified as HII regions. The dust attenuation of
every nebulae is characterized via the Balmer decrement and we use
existing environmental masks to identify their large-scale galactic
environment (centre, bar, arm, interarm, and disc). Using strong-line
prescriptions, we measure the gas-phase oxygen abundances
(metallicity) and ionization parameter for all HII regions. With this
new catalogue, we measure the radial metallicity gradients and explore
second-order metallicity variations within each galaxy. By quantifying
the global scatter in metallicity per galaxy, we find a weak negative
correlation with global star formation rate and stronger negative
correlation with global gas velocity dispersion (in both ionized and
molecular gas). With this paper we release the full catalogue of
strong line fluxes and derived properties, providing a rich data base
for a broad variety of ISM studies.
Description:
Parameters for 31399 nebulae detected across the 19 galaxies of the
PHANGS-MUSE sample. The catalogue contains position (projected and
deprojected), region area, observed and attenuation corrected fluxes
for the main strong emission line in the MUSE wavelength range,
velocity and velocity dispersion for a subset of these lines, Balmer
decrement based A(V) values, strong line metallicities, ionization
parameter, equivalent width for Halpha and Hbeta, and Halpha
extinction corrected luminosity.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 1360 31399 PHANGS-MUSE nebular catalogue
list.dat 87 19 List of fits images
fits/* . 19 Individual fits images
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Byte-by-byte Description of file: catalog.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- Galaxy Galaxy name (gal_name)
9- 14 F6.1 --- RegionID Region ID in the segmentation mask
(region_ID)
16- 34 F19.15 deg RAdeg Right ascension center (J2000),
weighted by Hα intensity
(cen_ra)
36- 56 F21.17 deg DEdeg Declination center (J2000),
weighted by Hα intensity
(cen_dec)
58 I1 --- FlagEdge [0/1] Flag set to 1 if within one
PSF of the field edge (flag_edge)
60 I1 --- FlagStar [0/1] Flag set to 1 if overlapping
with a star (flag_star)
62- 81 F20.18 deg deprojphi Deprojected position angle within
galaxy disc (deproj_phi)
83- 86 I4 pix Area H II region area (region_area)
88- 107 E20.15 10-23W/m2 FHb4861 Hβ flux (HB4861_FLUX)
109- 128 E20.15 10-23W/m2 FOIII5006 OIII5007 flux (OIII5006_FLUX)
130- 149 E20.15 10-23W/m2 FHa6562 Hα flux (HA6562_FLUX)
151- 170 E20.15 10-23W/m2 FNII6583 NII6584 flux (NII6583_FLUX)
172- 191 E20.15 10-23W/m2 FSII6716 SII6717 flux (SII6716_FLUX)
193- 212 E20.15 10-23W/m2 FSII6730 SII6731 flux (SII6730_FLUX)
214- 233 E20.15 10-23W/m2 FSIII9068 SIII9068 flux (SIII9068_FLUX)
235- 254 E20.15 10-23W/m2 FOI6300 OI6300 flux (OI6300_FLUX)
256- 275 E20.15 10-23W/m2 e_FHb4861 Hβ flux error (HB4861FLUXERR)
277- 296 E20.15 10-23W/m2 e_FOIII5006 OIII5007 flux error
(OIII5006FLUXERR)
298- 317 E20.15 10-23W/m2 e_FHa6562 Hα flux error
(HA6562FLUXERR)
319- 338 E20.15 10-23W/m2 e_FNII6583 NII6584 flux error
(NII6583FLUXERR)
340- 359 E20.15 10-23W/m2 e_FSII6716 SII6717 flux error
(SII6716FLUXERR)
361- 380 E20.15 10-23W/m2 e_FSII6730 SII6731 flux error
(SII6730FLUXERR)
382- 401 E20.15 10-23W/m2 e_FSIII9068 SIII9068 flux error
(SIII9068FLUXERR)
403- 422 E20.15 10-23W/m2 e_FOI6300 OI6300 flux error
(OI6300FLUXERR)
424- 443 F20.16 km/s sigmaHa6562 Hα velocity dispersion
(HA6562_SIGMA)
445- 464 F20.16 km/s sigmaNII6583 NII6584 velocity dispersion
(NII6583_SIGMA)
466- 485 F20.16 km/s sigmaOIII5006 OIII5007 velocity dispersion
(OIII5006_SIGMA)
487- 507 F21.16 km/s VHa6562 Hα velocity (HA6562_VEL)
509- 529 F21.16 km/s VNII6583 NII6584 velocity (NII6583_VEL)
531- 551 F21.16 km/s VOIII5006 OIII5007 velocity (OIII5006_VEL)
553- 571 F19.16 km/s e_sigmaHa6562 Hα velocity dispersion error
(HA6562SIGMAERR)
573- 592 F20.16 km/s e_sigmaNII6583 NII6584 velocity dispersion error
(NII6583SIGMAERR)
594- 613 E20.15 km/s e_sigmaOIII5006 OIII5007 velocity dispersion error
(OIII5006SIGMAERR)
615- 633 F19.16 km/s e_VHa6562 Hα velocity error
(HA6562VELERR)
635- 653 F19.16 km/s e_VNII6583 NII6584 velocity error
(NII6583VELERR)
655- 674 E20.15 km/s e_VOIII5006 OIII5007 velocity error
(OIII5006VELERR)
676- 695 E20.15 10-23W/m2 FHB4861cor ?=- Hβ attenuation corrected
flux (HB4861FLUXCORR)
697- 716 E20.15 10-23W/m2 FOIII5006cor ?=- OIII5007 attenuation corrected
flux (OIII5006FLUXCORR)
718- 737 E20.15 10-23W/m2 FHa6562cor ?=- Hα attenuation corrected
flux (HA6562FLUXCORR)
739- 758 E20.15 10-23W/m2 FNII6583cor ?=- NII6584 attenuation corrected
flux (NII6583FLUXCORR)
760- 779 E20.15 10-23W/m2 FSII6716cor ?=- SII6717 attenuation corrected
flux (SII6716FLUXCORR)
781- 800 E20.15 10-23W/m2 FSII6730cor ?=- SII6731 attenuation corrected
flux (SII6730FLUXCORR)
802- 821 E20.15 10-23W/m2 FSIII9068cor ?=- SIII9068 attenuation corrected
flux (SIII9068FLUXCORR)
823- 842 E20.15 10-23W/m2 FOI6300cor ?=- OI6300 attenuation corrected
flux (OI6300FLUXCORR)
844- 863 E20.15 10-23W/m2 e_FHB4861cor ?=- Hβ attenuation corrected
flux error (HB4861FLUXCORR_ERR)
865- 884 E20.15 10-23W/m2 e_FOIII5006cor ?=- OIII5007 attenuation corrected
flux error (OIII5006FLUXCORR_ERR)
886- 905 E20.15 10-23W/m2 e_FHa6562cor ?=- Hα attenuation corrected
flux error (HA6562FLUXCORR_ERR)
907- 926 E20.15 10-23W/m2 e_FNII6583cor ?=- NII6584 attenuation corrected
flux error (NII6583FLUXCORR_ERR)
928- 947 E20.15 10-23W/m2 e_FSII6716cor ?=- SII6717 attenuation corrected
flux error (SII6716FLUXCORR_ERR)
949- 968 E20.15 10-23W/m2 e_FSII6730cor ?=- SII6731 attenuation corrected
flux error (SII6730FLUXCORR_ERR)
970- 989 E20.15 10-23W/m2 e_FSIII9068cor ?=- SIII9068 attenuation corrected
flux error (SIII9068FLUXCORR_ERR)
991-1010 E20.15 10-23W/m2 e_FOI6300cor ?=- OI6300 attenuation corrected
flux error (OI6300FLUXCORR_ERR)
1012-1027 F16.14 --- MetScal ?=- Metallicity determined using the
Scal prescription (Pilyugin et al.,
2016MNRAS.457.3678P 2016MNRAS.457.3678P) (met_scal)
1029-1045 F17.15 --- e_MetScal ?=- Error on the Scal metallicity
(metscalerr)
1047-1048 I2 --- BPT-NII [-1/3] BPT flag (BPT_NII) (1)
1050-1051 I2 --- BPT-SII [-1/3] BPT flag (BPT_SII) (1)
1053-1054 I2 --- BPT-OI [-1/3] BPT flag (BPT_OI) (1)
1056 I1 --- Env [1/9] Environment flag from
Querejeta et al.,
2021A&A...656A.133Q 2021A&A...656A.133Q (Environment)
1058-1075 F18.15 --- DMetScal ?=- Offset in metallicity relative
to the radial gradient
(Deltametscal)
1077-1093 F17.15 --- deprojrR25 Deprojected distance from galaxy
centre in units of R25
(deprojrR25)
1095-1111 F17.15 --- deprojrreff Deprojected distance from galaxy
centre in units of reff
(deprojrreff)
1113-1131 F19.15 0.1nm EWHa6562raw Equivalent width of Ha, measured
directly (EWHA6562raw)
1133-1150 F18.15 0.1nm e_EWHa6562raw [] Error on Hα equivalent
width (EWHA6562raw_ERR)
1152-1170 F19.15 0.1nm EWHb4861raw Equivalent width of Hb, measured
directly (EWHB4861raw)
1172-1189 F18.15 0.1nm e_EWHb4861raw [] Error on Hα equivalent
width (EWHB4861raw_ERR)
1191-1209 F19.15 0.1nm EWHa6562fit Equivalent width of Ha, measured
after stellar continuum subtraction
(EWHA6562fit)
1211-1228 F18.15 0.1nm e_EWHa6562fit Error on Hα equivalent width
after continuum subtraction
(EWHA6562fit_ERR)
1230-1248 F19.15 0.1nm EWHb4861fit Equivalent width of Hb, measured
after stellar continuum subtraction
(EWHB4861fit)
1250-1267 F18.15 0.1nm e_EWHb4861fit Error on Hα equivalent width
after continuum subtraction
(EWHB4861fit_ERR)
1269-1285 F17.14 --- logU ?=- Ionization parameter from
SIII/SII using the prescription in
Diaz et al.,
1991MNRAS.253..245D 1991MNRAS.253..245D (logU)
1287-1303 F17.15 --- e_logU ?=- Error on the ionization
parameter (logU_err)
1305-1321 F17.15 mag AV ?=- V-band attenuation derived from
the Balmer decrement assuming an
O'Donnell (1994ApJ...422..158O 1994ApJ...422..158O)
extinction curve and RV=3.1 (AV)
1323-1339 F17.15 mag e_AV ?=- Error on V-band attenuation
(AV_ERR)
1341-1360 E20.15 10-7W LHa6562cor ?=- Attenuation corrected Hα
luminosity (HA6562LUMCORR)
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Note (1): Flag as follows:
0 = Star formation
-1 = Low S/N < 5
1 = Composite
2 = LI(N)ER
3 = AGN
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Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
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- 33 I4 Kibyte size Size of FITS file
35- 66 A32 --- FileName Name of FITS file, in subdirectory fits
68- 87 A20 --- Title Title of the FITS file
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Acknowledgements:
Brent Groves, brent.groves(at)uwa.edu.au
Kathryn Kreckel, kathryn.kreckel(at)uni-heidelberg.de
Enrico Congiu, econgiu(at)eso.org
References:
Diaz et al., 1991MNRAS.253..245D 1991MNRAS.253..245D,
Abundance analysis of Giant HII regions in M51
O'Donnell, 1994ApJ...437..262O 1994ApJ...437..262O,
The Effect of Grain Mantles and Grain Shape upon the 9.7 and 18 Micron
Silicate Features
Pilyugin et al., 2016MNRAS.457.3678P 2016MNRAS.457.3678P,
New calibrations for abundance determinations in H II regions
Querejeta et al., 2021A&A...656A.133Q 2021A&A...656A.133Q,
Stellar structures, molecular gas, and star formation across the PHANGS
sample of nearby galaxies
(End) Patricia Vannier [CDS] 06-Mar-2025