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Liu, Daizhong
[VerfasserIn];
Schinnerer, Eva
[VerfasserIn];
Saito, Toshiki
[VerfasserIn];
Rosolowsky, Erik
[VerfasserIn];
Leroy, Adam
[VerfasserIn];
Usero, Antonio
[VerfasserIn];
Sandstrom, Karin
[VerfasserIn];
Klessen, Ralf S.
[VerfasserIn];
Glover, Simon
[VerfasserIn];
Ao, Yiping
[VerfasserIn];
Bešlić, Ivana
[VerfasserIn];
Bigiel, Frank
[VerfasserIn];
Cao, Yixian
[VerfasserIn];
Chastenet, Jérémy
[VerfasserIn];
Chevance, Mélanie
[VerfasserIn];
Dale, Daniel A.
[VerfasserIn];
Gao, Yu
[VerfasserIn];
Hughes, Annie
[VerfasserIn];
Kreckel, Kathryn
[VerfasserIn];
Kruijssen, Diederik
[VerfasserIn];
Pan, Hsi-An
[VerfasserIn];
Pety, Jérôme
[VerfasserIn];
Salak, Dragan
[VerfasserIn];
Santoro, Francesco
[VerfasserIn];
[...]
C I and CO in nearby spiral galaxies
: I. Line ratio and abundance variations at ∼200 pc scales
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- Medientyp: E-Artikel
- Titel: C I and CO in nearby spiral galaxies : I. Line ratio and abundance variations at ∼200 pc scales
- Beteiligte: Liu, Daizhong [VerfasserIn]; Schinnerer, Eva [VerfasserIn]; Saito, Toshiki [VerfasserIn]; Rosolowsky, Erik [VerfasserIn]; Leroy, Adam [VerfasserIn]; Usero, Antonio [VerfasserIn]; Sandstrom, Karin [VerfasserIn]; Klessen, Ralf S. [VerfasserIn]; Glover, Simon [VerfasserIn]; Ao, Yiping [VerfasserIn]; Bešlić, Ivana [VerfasserIn]; Bigiel, Frank [VerfasserIn]; Cao, Yixian [VerfasserIn]; Chastenet, Jérémy [VerfasserIn]; Chevance, Mélanie [VerfasserIn]; Dale, Daniel A. [VerfasserIn]; Gao, Yu [VerfasserIn]; Hughes, Annie [VerfasserIn]; Kreckel, Kathryn [VerfasserIn]; Kruijssen, Diederik [VerfasserIn]; Pan, Hsi-An [VerfasserIn]; Pety, Jérôme [VerfasserIn]; Salak, Dragan [VerfasserIn]; Santoro, Francesco [VerfasserIn]; Schruba, Andreas [VerfasserIn]; Sun, Jiayi [VerfasserIn]; Teng, Yu-Hsuan [VerfasserIn]; Williams, Thomas G. [VerfasserIn]
- Erschienen: April 2023
- Erschienen in: Astronomy and astrophysics ; 672(2023) vom: Apr., Artikel-ID A36, Seite 1-22
- Sprache: Englisch
- DOI: 10.1051/0004-6361/202244564
- ISSN: 1432-0746
- Identifikator:
- Entstehung:
-
Anmerkungen:
Online veröffentlicht: 27. März 2023
- Beschreibung: We present new neutral atomic carbon [C I] (<sup>3<sup/>P<sub>1<sub/> → <sup>3<sup/>P<sub>0<sub/>) mapping observations within the inner ∼7 kpc and ∼4 kpc of the disks of NGC 3627 and NGC 4321 at a spatial resolution of 190 pc and 270 pc, respectively, using the Atacama Large Millimeter/Submillimeter Array (ALMA) Atacama Compact Array (ACA). We combine these with the CO(2−1) data from PHANGS-ALMA, and literature [C I] and CO data for two other starburst and/or active galactic nucleus (AGN) galaxies (NGC 1808, NGC 7469) with the aim of studying: (a) the spatial distributions of C I and CO emission; (b) the observed line ratio <i>R<i/><sub>C I/CO<sub/> = <i>I<i/><sub>[<sub>C I](1−0<sub/>)<sub/>/<i>I<i/><sub>CO(2−1<sub/>) as a function of various galactic properties; and (c) the abundance ratio of [C I/CO]. We find excellent spatial correspondence between C I and CO emission and nearly uniform <i>R<i/><sub>C I/CO<sub/> ∼ 0.1 across the majority of the star-forming disks of NGC 3627 and NGC 4321. However, <i>R<i/><sub>C I/CO<sub/> strongly varies from ∼0.05 at the center of NGC 4321 to > 0.2 − 0.5 in NGC 1808’s starbursting center and NGC 7469’s center with an X-ray-luminous AGN. Meanwhile, <i>R<i/><sub>C I/CO<sub/> does not obviously vary with ⟨<i>U<i/>⟩, which is in line with predictions from photodissociation-dominated region (PDR) models. We also find a mildly decreasing <i>R<i/><sub>C I/CO<sub/> value with an increasing metallicity over 0.7 − 0.85 <i>Z<i/><sub>⊙<sub/>, which is consistent with the literature. Assuming various typical interstellar medium (ISM) conditions representing giant molecular clouds, active star-forming regions, and strong starbursting environments, we calculated the (non)local-thermodynamic-equilibrium radiative transfer and estimated the [C I/CO] abundance ratio to be ∼0.1 across the disks of NGC 3627 and NGC 4321, similar to previous large-scale findings in Galactic studies. However, this abundance ratio likely experiences a substantial increase, up to ∼1 and ≳1 − 5 in NGC 1808’s starburst and NGC 7469’s strong AGN environments, respectively. This result is in line with the expectations for cosmic-ray dominated region (CRDR) and X-ray dominated region (XDR) chemistry. Finally, we do not find robust evidence for a generally CO-dark-and-C I-bright gas in the disk areas we probed.
- Zugangsstatus: Freier Zugang