Stellar associations powering H ii regions - I. Defining an evolutionary sequence

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Fältnamn	Indikatorer	Metadata
000		04248naa a2200709 4500
001		oai:DiVA.org:su-229866
003		SwePub
008		240531s2023 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-2298662 URI
024	7	a https://doi.org/10.1093/mnras/stad8782 DOI
040		a (SwePub)su
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Scheuermann, Fabian4 aut
245	1 0	a Stellar associations powering H ii regions - I. Defining an evolutionary sequence
264		c 2023-03-22
264	1	b Oxford University Press (OUP),c 2023
338		a print2 rdacarrier
520		a Connecting the gas in H II regions to the underlying source of the ionizing radiation can help us constrain the physical processes of stellar feedback and how H II regions evolve over time. With PHANGS-MUSE, we detect nearly 24 000 H II regions across 19 galaxies and measure the physical properties of the ionized gas (e.g. metallicity, ionization parameter, and density). We use catalogues of multiscale stellar associations from PHANGS-HST to obtain constraints on the age of the ionizing sources. We construct a matched catalogue of 4177 H II regions that are clearly linked to a single ionizing association. A weak anticorrelation is observed between the association ages and the H a equi v alent width EW (H a), the H a/ FUV flux ratio, and the ionization parameter, log q . As all three are expected to decrease as the stellar population ages, this could indicate that we observe an evolutionary sequence. This interpretation is further supported by correlations between all three properties. Interpreting these as evolutionary tracers, we find younger nebulae to be more attenuated by dust and closer to giant molecular clouds, in line with recent models of feedback-regulated star formation. We also observe strong correlations with the local metallicity variations and all three proposed age tracers, suggestive of star formation preferentially occurring in locations of locally enhanced metallicity. Overall, EW (H a) and log q show the most consistent trends and appear to be most reliable tracers for the age of an H II region.
650	7	a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe
650	7	a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng
653		a H II regions
653		a galaxies: ISM
653		a galaxies: star clusters: general
700	1	a Kreckel, Kathryn4 aut
700	1	a Barnes, Ashley T.4 aut
700	1	a Belfiore, Francesco4 aut
700	1	a Groves, Brent4 aut
700	1	a Hannon, Stephen4 aut
700	1	a Lee, Janice C.4 aut
700	1	a Minsley, Rebecca4 aut
700	1	a Rosolowsky, Erik4 aut
700	1	a Bigiel, Frank4 aut
700	1	a Blanc, Guillermo A.4 aut
700	1	a Boquien, Mederic4 aut
700	1	a Dale, Daniel A.4 aut
700	1	a Deger, Sinan,d 1985-u Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)side0330
700	1	a Egorov, Oleg4 aut
700	1	a Emsellem, Eric4 aut
700	1	a Glover, Simon C. O.4 aut
700	1	a Grasha, Kathryn4 aut
700	1	a Hassani, Hamid4 aut
700	1	a Jeffreson, Sarah M. R.4 aut
700	1	a Klessen, Ralf S.4 aut
700	1	a Kruijssen, J. M. Diederik4 aut
700	1	a Larson, Kirsten L.4 aut
700	1	a Leroy, Adam K.4 aut
700	1	a Lopez, Laura A.4 aut
700	1	a Pan, Hsi-An4 aut
700	1	a Sanchez-Blazquez, Patricia4 aut
700	1	a Santoro, Francesco4 aut
700	1	a Schinnerer, Eva4 aut
700	1	a Thilker, David A.4 aut
700	1	a Whitmore, Bradley C.4 aut
700	1	a Watkins, Elizabeth J.4 aut
700	1	a Williams, Thomas G.4 aut
710	2	a Stockholms universitetb Fysikum4 org
773	0	t Monthly notices of the Royal Astronomical Societyd : Oxford University Press (OUP)g 522:2, s. 2369-2383q 522:2<2369-2383x 0035-8711x 1365-2966
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-229866
856	4 8	u https://doi.org/10.1093/mnras/stad878

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