PHANGS–JWST First Results: Stellar-feedback-driven Excitation and Dissociation of Molecular Gas in the Starburst Ring of NGC 1365?

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Fältnamn	Indikatorer	Metadata
000		04886naa a2200877 4500
001		oai:DiVA.org:su-215795
003		SwePub
008		230329s2023 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-2157952 URI
024	7	a https://doi.org/10.3847/2041-8213/aca9732 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 Liu, Daizhong4 aut
245	1 0	a PHANGS–JWST First Results :b Stellar-feedback-driven Excitation and Dissociation of Molecular Gas in the Starburst Ring of NGC 1365?
264		c 2023-02-16
264	1	b American Astronomical Society,c 2023
338		a print2 rdacarrier
520		a We compare embedded young massive star clusters (YMCs) to (sub-)millimeter line observations tracing the excitation and dissociation of molecular gas in the starburst ring of NGC 1365. This galaxy hosts one of the strongest nuclear starbursts and richest populations of YMCs within 20 Mpc. Here we combine near-/mid-IR PHANGS–JWST imaging with new Atacama Large Millimeter/submillimeter Array multi-J CO (1–0, 2–1 and 4–3) and [C ı] (1–0) mapping, which we use to trace CO excitation via R42 = ICO(4−3)/ICO(2−1) and R21 = ICO(2−1)/ICO(1−0) and dissociation via RCICO = I[CI](1−0)/ICO(2−1) at 330 pc resolution. We find that the gas flowing into the starburst ring from northeast to southwest appears strongly affected by stellar feedback, showing decreased excitation (lower R42) and increased signatures of dissociation (higher RCICO) in the downstream regions. There, radiative-transfer modeling suggests that the molecular gas density decreases and temperature and [CI/CO] abundance ratio increase. We compare R42 and RCICO with local conditions across the regions and find that both correlate with near-IR 2 μm emission tracing the YMCs and with both polycyclic aromatic hydrocarbon (11.3 μm) and dust continuum (21 μm) emission. In general, RCICO exhibits ∼0.1 dex tighter correlations than R42, suggesting C ı to be a more sensitive tracer of changing physical conditions in the NGC 1365 starburst than CO (4–3). Our results are consistent with a scenario where gas flows into the two arm regions along the bar, becomes condensed/shocked, forms YMCs, and then these YMCs heat and dissociate the gas.
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 Interstellar medium
653		a Molecular gas
653		a Young massive clusters
653		a Stellar feedback
653		a Starburst galaxies
653		a Interstellar line emission
653		a Barred spiral galaxies
653		a CO line emission
653		a AGN host galaxies
653		a Dust continuum emission
700	1	a Schinnerer, Eva4 aut
700	1	a Cao, Yixian4 aut
700	1	a Leroy, Adam4 aut
700	1	a Usero, Antonio4 aut
700	1	a Rosolowsky, Erik4 aut
700	1	a Kruijssen, J. M. Diederik4 aut
700	1	a Chevance, Mélanie4 aut
700	1	a Glover, Simon C. O.4 aut
700	1	a Sormani, Mattia C.4 aut
700	1	a Bolatto, Alberto D.4 aut
700	1	a Sun, Jiayi4 aut
700	1	a Stuber, Sophia K.4 aut
700	1	a Teng, Yu-Hsuan4 aut
700	1	a Bigiel, Frank4 aut
700	1	a Bešlić, Ivana4 aut
700	1	a Grasha, Kathryn4 aut
700	1	a Henshaw, Jonathan D.4 aut
700	1	a Barnes, Ashley T.4 aut
700	1	a den Brok, Jakob S.4 aut
700	1	a Saito, Toshiki4 aut
700	1	a Dale, Daniel A.4 aut
700	1	a Watkins, Elizabeth J.4 aut
700	1	a Pan, Hsi-An4 aut
700	1	a Klessen, Ralf S.4 aut
700	1	a Emsellem, Eric4 aut
700	1	a Anand, Gagandeep S.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, Oleg V.4 aut
700	1	a Faesi, Christopher M.4 aut
700	1	a Hassani, Hamid4 aut
700	1	a Larson, Kirsten L.4 aut
700	1	a Lee, Janice C.4 aut
700	1	a Lopez, Laura A.4 aut
700	1	a Pety, Jérôme4 aut
700	1	a Sandstrom, Karin4 aut
700	1	a Thilker, David A.4 aut
700	1	a Whitmore, Bradley C.4 aut
700	1	a Williams, Thomas G.4 aut
710	2	a Stockholms universitetb Fysikum4 org
773	0	t Astrophysical Journal Lettersd : American Astronomical Societyg 944:2q 944:2x 2041-8205x 2041-8213
856	4	u https://doi.org/10.3847/2041-8213/aca973y Fulltext
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-215795
856	4 8	u https://doi.org/10.3847/2041-8213/aca973

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