J/A+A/672/A148 Catalogue of classified nebulae (Congiu+, 2023)
PHANGS-MUSE: Detection and Bayesian classification of ∼40000 ionised nebulae
in nearby spiral galaxies.
Congiu E., Blanc G.A., Belfiore F., Santoro F., Scheuermann F., Kreckel K.,
Emsellem E., Groves B., Pan H.-A. , Bigiel F., Dale D.A., Glover S.C.O.,
Grasha K. , Egorov O.V., Leroy A., Schinnerer E., Watkins E.J.,
Williams T.G.
<Astron. Astrophys. 672, A148 (2023)>
=2023A&A...672A.148C 2023A&A...672A.148C (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, optical ; H II regions ; Planetary nebulae ;
Supernova remnants ; Interstellar medium
Keywords: galaxies: ISM - H II regions - planetary nebulae: general -
ISM: supernova remnants - catalogs
Abstract:
In this work, we present a new catalogue of >40000 ionised nebulae
distributed across the 19 galaxies observed by the PHANGS-MUSE survey.
The nebulae have been classified using a new model-comparison-based
algorithm that exploits the odds ratio principle to assign a
probabilistic classification to each nebula in the sample. The
resulting catalogue is the largest catalogue containing complete
spectral and spatial information for a variety of ionised nebulae
available so far in the literature. We developed this new algorithm to
address some of the main limitations of the traditional classification
criteria, such as their binarity, the sharpness of the involved
limits, and the limited amount of data they rely on for the
classification. The analysis of the catalogue shows that the algorithm
performs well when selecting HII regions. In fact, we can recover
their luminosity function, and its properties are in line with what is
available in the literature. We also identify a rather significant
population of shock-ionised regions (mostly composed of supernova
remnants), which is an order of magnitude larger than any other
homogeneous catalogue of supernova remnants currently available in the
literature. The number of supernova remnants we identify per galaxy is
in line with results in our Galaxy and in other very nearby sources.
However, limitations in the source detection algorithm result in an
incomplete sample of planetary nebulae, even though their
classification seems robust. Finally, we demonstrate how applying a
correction for the contribution of the diffuse ionised gas to the
nebulae's spectra is essential to obtain a robust classification of
the objects and how a correct measurement of the extinction using
diffuse-ionised-gas-corrected line fluxes prompts the use of a higher
theoretical Ha/Hb ratio (3.03) than what is commonly used when
recovering the E(B-V) via the Balmer decrement technique in massive
star-forming galaxies.
Description:
Parameters for 40920 nebulae detected across the 19 galaxies of the
PHANGS-MUSE sample. Each nebula is classified in in one of five
classes, following the algorithm described in the paper. The five
classes are: H II regions, supernova remnants, planetary nebulae,
ambiguous and unclassified. For each nebula position, size, line
fluxes, flux errors, signal to noise ratios for each line, velocity
and velocity dispersion, Ha luminosity, evidence, probability,
classification and E(B-V) are given. All line fluxes, and relative
errors and signal to noise ratios are provided both as measured from
the data and corrected for DIG emission. Line fluxes are corrected for
Galactic extinction but not for internal extinction.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 806 40920 Properties of nebulae
(corrected version, 19-Oct-2023)
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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- 5 I5 --- Index Index of the nebula in the catalog
(Index)
7- 13 A7 --- Galaxy Galaxy name (gal_name)
15- 18 I4 --- Region Region ID in the segmentation map
(region_ID)
20- 24 F5.2 Mpc Dist Galaxy distance in Mpc (DIST)
26- 37 F12.8 deg RAdeg Right Ascension of the region
(J2000) (ra)
39- 50 F12.8 deg DEdeg Declination of the region
(J2000) (dec)
52- 57 F6.2 arcsec dDist Deprojected distance from galaxy
nucleus (deproj_dist)
59- 65 F7.5 rad dphi Deprojected position angle
(deproj_phi)
67- 70 I4 pix2 Area Area of the region in pixel2
(region_area)
72- 75 F4.2 arcsec Circrad Circularized radius of the region
(regioncircrad)
77- 89 F13.4 10-23W/m2 FHB4861 Hb flux (HB4861_FLUX)
91-103 F13.4 10-23W/m2 FOIII5006 Flux of [O III]5007 (OIII5006_FLUX)
105-117 F13.4 10-23W/m2 FHA6562 Flux of Ha (HA6562_FLUX)
119-131 F13.4 10-23W/m2 FNII6583 Flux of [N II]6584 (NII6583_FLUX)
133-144 F12.4 10-23W/m2 FSII6716 Flux of [S II]6717 (SII6716_FLUX)
146-157 F12.4 10-23W/m2 FSII6730 Flux of [S II]6731 (SII6730_FLUX)
159-170 F12.4 10-23W/m2 FOI6300 Flux of [O I]6300 (OI6300_FLUX)
172-183 F12.4 10-23W/m2 FSIII9068 Flux of [S III]9068 (SIII9068_FLUX)
185-193 F9.4 10-23W/m2 e_FHB4861 ?=- Flux error for Hb
(HB4861FLUXERR)
195-202 F8.4 10-23W/m2 e_FOIII5006 Flux error for [O III]5007
(OIII5006FLUXERR)
204-212 F9.4 10-23W/m2 e_FHA6562 Flux error for Ha (HA6562FLUXERR)
214-222 F9.4 10-23W/m2 e_FNII6583 Flux error for [N II]6584
(NII6583FLUXERR)
224-232 F9.4 10-23W/m2 e_FSII6716 Flux error for [S II]6717
(SII6716FLUXERR)
234-241 F8.4 10-23W/m2 e_FSII6730 Flux error for [S II]6731
(SII6730FLUXERR)
243-250 F8.4 10-23W/m2 e_FOI6300 Flux error for [O I]6300
(OI6300FLUXERR)
252-261 F10.4 10-23W/m2 e_FSIII9068 ?=- Flux error for [S III]9068
(SIII9068FLUXERR)
263-272 F10.4 --- SNRFHB4861 ?=- S/N for Hb (HB4861FLUXSNR)
274-283 F10.4 --- SNRFOIII5006 S/N for [O III]5007
(OIII5006FLUXSNR)
285-294 F10.4 --- SNRFHA6562 S/N for Ha (HA6562FLUXSNR)
296-305 F10.4 --- SNRFNII6583 S/N for [N II]6584
(NII6583FLUXSNR)
307-316 F10.4 --- SNRFSII6716 S/N for [S II]6717
(SII6716FLUXSNR)
318-327 F10.4 --- SNRFSII6730 S/N for [S II]6731
(SII6730FLUXSNR)
329-338 F10.4 --- SNRFOI6300 S/N for [O I]6300 (OI6300FLUXSNR)
340-348 F9.4 --- SNRFSIII9068 ?=- S/N for [S III]9068
(SIII9068FLUXSNR)
350-362 F13.4 10-23W/m2 FHB4861DIG DIG corrected Hb flux
(HB4861FLUXDIG)
364-376 F13.4 10-23W/m2 FOIII5006DIG DIG corrected [O III]5007 flux
(III5006FLUXDIG)
378-390 F13.4 10-23W/m2 FHA6562DIG DIG corrected Ha flux
(HA6562FLUXDIG)
392-404 F13.4 10-23W/m2 FNII6583DIG DIG corrected [N II]6584 flux
(NII6583FLUXDIG)
406-417 F12.4 10-23W/m2 FSII6716DIG DIG corrected [S II]6717 flux
(SII6716FLUXDIG)
419-430 F12.4 10-23W/m2 FSII6730DIG ?=- DIG corrected [S II]6731 flux
(SII6730FLUXDIG)
432-443 F12.4 10-23W/m2 FOI6300DIG DIG corrected [O I]6300 flux
(OI6300FLUXDIG)
445-457 F13.4 10-23W/m2 FSIII9068DIG DIG corrected [S III]9068 flux
(SIII9068FLUXDIG)
459-467 F9.4 10-23W/m2 e_FHB4861DIG ?=- DIG corrected Hb error
(HB4861FLUXERR_DIG)
469-476 F8.4 10-23W/m2 e_FOIII5006DIG DIG corrected [O III]5007 error
(OIII5006FLUXERR_DIG)
478-486 F9.4 10-23W/m2 e_FHA6562DIG DIG corrected Ha error
(HA6562FLUXERR_DIG)
488-496 F9.4 10-23W/m2 e_FNII6583DIG DIG corrected N II]6584 error
(NII6583FLUXERR_DIG)
498-506 F9.4 10-23W/m2 e_FSII6716DIG DIG corrected [S II]6717 error
(SII6716FLUXERR_DIG)
508-516 F9.4 10-23W/m2 e_FSII6730DIG ?=- DIG corrected [S II]6731 error
(SII6730FLUXERR_DIG)
518-525 F8.4 10-23W/m2 e_FOI6300DIG DIG corrected [O I]6300 error
(OI6300FLUXERR_DIG)
527-536 F10.4 10-23W/m2 e_FSIII9068DIG ?=- DIG corrected [S III]9068 error
(SIII9068FLUXERR_DIG)
538-547 F10.4 --- SNRFHB4861DIG ?=- DIG corrected Hb S/N
(HB4861FLUXDIG_SNR)
549-558 F10.4 --- SNRFOIII5006DIG DIG corrected [O III]5007 S/N
(OIII5006FLUXDIG_SNR)
560-569 F10.4 --- SNRFHA6562DIG DIG corrected Ha S/N
(HA6562FLUXDIG_SNR)
571-580 F10.4 --- SNRFNII6583DIG DIG corrected [N II]6584 S/N
(NII6583FLUXDIG_SNR)
582-591 F10.4 --- SNRFSII6716DIG DIG corrected [S II]6717 S/N
(SII6716FLUXDIG_SNR)
593-602 F10.4 --- SNRFSII6730DIG ?=- DIG corrected [S II]6731 S/N
(SII6730FLUXDIG_SNR)
604-612 F9.4 --- SNRFOI6300DIG DIG corrected [O I]6300 S/N
(OI6300FLUXDIG_SNR)
614-623 F10.4 --- SNRFSIII9068DIG ?=- DIG corrected [S III]9068 S/N
(SIII9068FLUXDIG_SNR)
625-629 F5.2 [10-7W] logLHa Log10 of Ha luminosity (L_HA)
632-636 F5.2 [10-7W] logLHaDIG Log10 of the DIG corrected Ha
luminosity (LHADIG)
640-646 F7.3 km/s sigHA6562 Velocity dispersion from Ha
(HA6562_SIGMA)
649-655 F7.3 km/s sigNII6583 Velocity dispersion from [N II]6584
(NII6583_SIGMA)
657-663 F7.3 km/s e_sigHA6562 Velocity dispersion error from Ha
(HA6562SIGMAERR)
665-671 F7.3 km/s e_sigNII6583 Velocity dispersion error from
[N II]6584 (NII6583SIGMAERR)
673-680 F8.3 km/s V-HA6562 Velocity from Ha (HA6562_VEL)
685-692 F8.3 km/s V-NII6583 Velocityfrom [N II]6584
(NII6583_VEL)
698-703 F6.3 km/s e_V-HA6562 Velocity error from Ha
(HA6562VELERR)
709-714 F6.3 km/s e_V-NII6583 Velocity error from [N II]6584
(NII6583VELERR)
719-729 F11.6 --- zsh Evidence for the shock models
(z_sh)
731-741 F11.6 --- zhii Evidence for the HII region models
(z_hii)
743-753 E11.6 --- zpn Evidence for the PNe models
(z_pn)
755-759 F5.1 % psh ?=- Probability of the shock models
(p_sh)
761-765 F5.1 % ppn ?=- Probability of the PNe models
(p_pn)
767-771 F5.1 % phii ?=- Probability of the HII region
models (p_hii)
773-775 A3 --- c Final classification (c)
778-782 F5.3 mag E(B-V) ?=- Balmer decrement E(B-V) (ebv)
784-788 F5.3 mag E(B-V)dig ?=- DIG corrected Balmer decrement
E(B-V) (ebv_dig)
790-794 F5.3 mag E(B-V)hii ?=- IZI E(B-V) from HII regions
models (ebv_hii)
796-800 F5.3 mag E(B-V)pn ?=- IZI E(B-V) from PNe models
(ebv_pn)
802-806 F5.3 mag E(B-V)sh ?=- IZI E(B-V) from shock models
(ebv_sh)
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Acknowledgements:
Enrico Congiu, econgiu(at)eso.org
References:
Anand et al., 2021MNRAS.501.3621A 2021MNRAS.501.3621A,
Distances to PHANGS galaxies: New tip of the red giant branch measurements
and adopted distances
History:
25-Aug-2023: on-line version
19-Oct-2023: corrected version from author
(End) Enrioco Congiu [ESO, Chile], Patricia Vannier [CDS] 02-Feb-2023