Starburst Energy Feedback Seen through HCO+/HOC+ Emission in NGC 253 from ALCHEMI

doi:10.3847/1538-4357/ac26b8

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	Starburst Energy Feedback Seen through HCO+/HOC+ Emission in NGC 253 from ALCHEMI
	Harada, Nanase 1,2,3; Martin, Sergio 4,5; Mangum, Jeffrey G.6; Sakamoto, Kazushi 2; Muller, Sebastien 7; Tanaka, Kunihiko 8; Nakanishi, Kouichiro 1,3; Herrero-Illana, Ruben 9,10; Yoshimura, Yuki 11; Muhle, Stefanie 12; Aladro, Rebeca 13; Colzi, Laura 14,15; Rivilla, Victor M.14,15; Aalto, Susanne 7; Behrens, Erica 16; Henkel, Christian13,17,18 ; Holdship, Jonathan 19,20; Humire, P. K.13; Meier, David S.21,22; Nishimura, Yuri 11,23; van der Werf, Paul P.19; Viti, Serena 19,20
	2021-12-01
Source Publication	ASTROPHYSICAL JOURNAL
ISSN	0004-637X
Volume	923 Issue:1 Pages:24
Contribution Rank	18
Abstract	Molecular abundances are sensitive to the UV photon flux and cosmic-ray ionization rate. In starburst environments, the effects of high-energy photons and particles are expected to be stronger. We examine these astrochemical signatures through multiple transitions of HCO+ and its metastable isomer HOC+ in the center of the starburst galaxy NGC 253 using data from the Atacama Large Millimeter/submillimeter Array large program ALMA Comprehensive High-resolution Extragalactic Molecular inventory. The distribution of the HOC+(1-0) integrated intensity shows its association with "superbubbles," cavities created either by supernovae or expanding H ii regions. The observed HCO+/HOC+ abundance ratios are similar to 10-150, and the fractional abundance of HOC+ relative to H-2 is similar to 1.5 x 10(-11)-6 x 10(-10), which implies that the HOC+ abundance in the center of NGC 253 is significantly higher than in quiescent spiral arm dark clouds in the Galaxy and the Galactic center clouds. Comparison with chemical models implies either an interstellar radiation field of G (0) greater than or similar to 10(3) if the maximum visual extinction is greater than or similar to 5, or a cosmic-ray ionization rate of zeta greater than or similar to 10(-14) s(-1) (3-4 orders of magnitude higher than that within clouds in the Galactic spiral arms) to reproduce the observed results. From the difference in formation routes of HOC+, we propose that a low-excitation line of HOC+ traces cosmic-ray dominated regions, while high-excitation lines trace photodissociation regions. Our results suggest that the interstellar medium in the center of NGC 253 is significantly affected by energy input from UV photons and cosmic rays, sources of energy feedback.
DOI	10.3847/1538-4357/ac26b8
Indexed By	SCI
Language	英语
WOS Keyword	COSMIC-RAY IONIZATION ; SUPER STAR-CLUSTERS ; MOLECULAR GAS ; LINE SURVEY ; CHANDRA OBSERVATIONS ; INTERSTELLAR CLOUDS ; STELLAR CLUSTERS ; COLOGNE DATABASE ; VLA OBSERVATIONS ; ABUNDANCE RATIO
Funding Project	JSPS KAKENHI[JP21K03634] ; Ministry of Science and Technology, Taiwan[MOST 108-2112-M-001-015] ; Ministry of Science and Technology, Taiwan[109-2112-M-001-020] ; NAOJ ALMA Scientific Research grant[2017-06B] ; Comunidad de Madrid through the Atraccion de Talento Investigador (Doctores con experiencia) Grant (COOL: Cosmic Origins Of Life)[2019-T1/TIC-15379]
WOS Research Area	Astronomy & Astrophysics
WOS Subject	Astronomy & Astrophysics
WOS ID	WOS:000728520500001
Publisher	IOP Publishing Ltd
Funding Organization	JSPS KAKENHI ; Ministry of Science and Technology, Taiwan ; NAOJ ALMA Scientific Research grant ; Comunidad de Madrid through the Atraccion de Talento Investigador (Doctores con experiencia) Grant (COOL: Cosmic Origins Of Life)
Citation statistics	Cited Times:27[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.xao.ac.cn/handle/45760611-7/4402
Collection	中国科学院新疆天文台射电天文研究室_恒星形成与演化研究团组
Corresponding Author	Harada, Nanase
Affiliation	1.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 2.Acad Sinica, Inst Astron & Astrophys, 11F AS NTU Astron Math Bldg,Sec 4,Roosevelt Rd, Taipei 10617, Taiwan 3.Grad Univ Adv Studies SOKENDAI, Sch Sci, Dept Astron, 2-21-1 Osawa, Mitaka, Tokyo 1811855, Japan 4.European Southern Observ, Alonso Cordova 3107, Santiago 7630355, Chile 5.Joint ALMA Observ, Alonso Cordova 3107, Santiago 7630355, Chile 6.Natl Radio Astron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA 7.Chalmers Univ Technol, Onsala Space Observ, Dept Space Earth & Environm, SE-43992 Onsala, Sweden 8.Keio Univ, Fac Sci & Technol, Dept Phys, 3-14-1 Hiyoshi, Yokohama, Kanagawa 2238522, Japan 9.European Southern Observ, Alonso Cordova 3107,Casilla 19001, Santiago, Chile 10.CSIC, Inst Space Sci ICE, Campus UAB, E-08193 Barcelona, Spain 11.Univ Tokyo, Inst Astron, Grad Sch Sci, 2-21-1 Osawa, Mitaka, Tokyo 1810015, Japan 12.Univ Bonn, Argelander Inst Astron, Hugel 71, D-53121 Bonn, Germany 13.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 14.Ctr Astrobiol CSIC INTA, Ctra Ajalvir Km 4, E-28850 Madrid, Spain 15.INAF Osservatorio Astrofis Arcetri, Largo Enrico Fermi 5, I-50125 Florence, Italy 16.Univ Virginia, Dept Astron, POB 400325,530 McCormick Rd, Charlottesville, VA 22904 USA 17.King Abdulaziz Univ, Dept Astron, Fac Sci, POB 80203, Jeddah 21589, Saudi Arabia 18.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 19.Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands 20.UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England 21.New Mexico Inst Min & Technol, 801 Leroy Pl, Socorro, NM 87801 USA 22.Natl Radio Astron Observ, POB O,1003 Lopezville Rd, Socorro, NM 87801 USA 23.Natl Astron Observ Japan, ALMA Project, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
Recommended Citation GB/T 7714	Harada, Nanase,Martin, Sergio,Mangum, Jeffrey G.,et al. Starburst Energy Feedback Seen through HCO+/HOC+ Emission in NGC 253 from ALCHEMI[J]. ASTROPHYSICAL JOURNAL,2021,923(1):24.
APA	Harada, Nanase.,Martin, Sergio.,Mangum, Jeffrey G..,Sakamoto, Kazushi.,Muller, Sebastien.,...&Viti, Serena.(2021).Starburst Energy Feedback Seen through HCO+/HOC+ Emission in NGC 253 from ALCHEMI.ASTROPHYSICAL JOURNAL,923(1),24.
MLA	Harada, Nanase,et al."Starburst Energy Feedback Seen through HCO+/HOC+ Emission in NGC 253 from ALCHEMI".ASTROPHYSICAL JOURNAL 923.1(2021):24.

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