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Methanol masers in ...
Methanol masers in NGC 253 with ALCHEMI
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- Humire, Pedro (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Henkel, C. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Chinese Academy of Sciences,King Abdulaziz University
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- Hernández-Gómez, A. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Martin, S. (author)
- European Southern Observatory Santiago,Atacama Large Millimeter-submillimeter Array (ALMA)
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- Mangum, J. G. (author)
- National Radio Astronomy Observatory
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- Harada, N. (author)
- The Graduate University for Advanced Studies (SOKENDAI),National Astronomical Observatory of Japan,Academia Sinica Taiwan
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- Muller, Sebastien, 1976 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Sakamoto, K. (author)
- Academia Sinica Taiwan
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- Tanaka, Kunihiko (author)
- Keio University
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- Yoshimura, Y. (author)
- University of Tokyo, Japan
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- Nakanishi, Kouichiro (author)
- National Astronomical Observatory of Japan,The Graduate University for Advanced Studies (SOKENDAI)
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- Muhle, S. (author)
- Universität Bonn,University of Bonn
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- Herrero-Illana, R. (author)
- European Southern Observatory Santiago,Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC
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- Meier, D. S. (author)
- New Mexico Institute of Mining and Technology,National Radio Astronomy Observatory Socorro
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- Caux, E. (author)
- Universite Paul Sabatier Toulouse III,Paul Sabatier University
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- Aladro, Rebeca, 1979 (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Mauersberger, R. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Viti, Serena (author)
- University College London (UCL),Universiteit Leiden (UL),Leiden University (UL)
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- Colzi, L. (author)
- Centro de Astrobiologia (CAB)
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- Rivilla, Víctor M. (author)
- Centro de Astrobiologia (CAB)
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- Gorski, Mark, 1989 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Menten, K. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Huang, K. Y. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- Aalto, Susanne, 1964 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- van der Werf, P. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- Emig, K.L. (author)
- National Radio Astronomy Observatory
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Max Planck Gesellschaft zur Förderung der Wissenschaften eV. (MPG) Chinese Academy of Sciences (creator_code:org_t)
- 2022-07-08
- 2022
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 663
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https://research.cha... (primary) (free)
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Context. Methanol masers of Class I (collisionally pumped) and Class II (radiatively pumped) have been studied in great detail in our Galaxy in a variety of astrophysical environments such as shocks and star-forming regions and are they are helpful to analyze the properties of the dense interstellar medium. However, the study of methanol masers in external galaxies is still in its infancy. Aims. Our main goal is to search for methanol masers in the central molecular zone (CMZ; inner 500 pc) of the nearby starburst galaxy NGC253. Methods. Covering a frequency range between 84 and 373 GHz (λ = 3.6-0.8 mm) at high angular (1."6 ∼ 27 pc) and spectral (∼8-9 km s-1) resolution with ALCHEMI (ALMA Comprehensive High-resolution Extragalactic Molecular Inventory), we have probed dierent regions across the CMZ of NGC253. In order to look for methanol maser candidates, we employed the rotation diagram method and a set of radiative transfer models. Results.We detect for the first time masers above 84 GHz in NGC253, covering an ample portion of the J-1 (J-1)0-E line series (at 84, 132, 229, and 278 GHz) and the J0 (J-1)1 A series (at 95, 146, and 198 GHz). This confirms the presence of the Class I maser line at 84 GHz, which was already reported, but now being detected in more than one location. For the J-1 (J-1)0-E line series, we observe a lack of Class I maser candidates in the central star-forming disk. Conclusions. The physical conditions for maser excitation in the J-1 (J-1)0-E line series can be weak shocks and cloud-cloud collisions as suggested by shock tracers (SiO and HNCO) in bi-symmetric shock regions located in the outskirts of the CMZ. On the other hand, the presence of photodissociation regions due to a high star-formation rate would be needed to explain the lack of Class I masers in the very central regions.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- Galaxies: Starburst
- Masers
- Submillimeter: Galaxies
- Radio lines: Galaxies
- Galaxies: Spiral
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Humire, Pedro
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Henkel, C.
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Hernández-Gómez, ...
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Martin, S.
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Mangum, J. G.
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Harada, N.
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show more...
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Muller, Sebastie ...
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Sakamoto, K.
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Tanaka, Kunihiko
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Yoshimura, Y.
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Nakanishi, Kouic ...
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Muhle, S.
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Herrero-Illana, ...
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Meier, D. S.
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Caux, E.
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Aladro, Rebeca, ...
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Mauersberger, R.
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Viti, Serena
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Colzi, L.
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Rivilla, Víctor ...
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Gorski, Mark, 19 ...
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Menten, K.
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Huang, K. Y.
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Aalto, Susanne, ...
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van der Werf, P.
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Emig, K.L.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Meteorology and ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
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Astronomy and As ...
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Chalmers University of Technology