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Sökning: WFRF:(Viti M.) > (2020-2024) > Tracing Interstella...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00005672naa a2200589 4500
001oai:research.chalmers.se:ee2cd5d8-e374-48e7-a4b7-427e35cd0121
003SwePub
008221201s2022 | |||||||||||000 ||eng|
0247 a https://doi.org/10.3847/1538-4357/ac91ce2 DOI
0247 a https://research.chalmers.se/publication/5334372 URI
040 a (SwePub)cth
041 a engb eng
042 9 SwePub
072 7a art2 swepub-publicationtype
072 7a ref2 swepub-contenttype
1001 a Behrens, E.u University of Virginia4 aut
2451 0a Tracing Interstellar Heating: An ALCHEMI Measurement of the HCN Isomers in NGC 253
264 c 2022-11-14
264 1b American Astronomical Society,c 2022
338 a electronic2 rdacarrier
520 a We analyze HCN and HNC emission in the nearby starburst galaxy NGC 253 to investigate its effectiveness in tracing heating processes associated with star formation. This study uses multiple HCN and HNC rotational transitions observed using the Atacama Large Millimeter/submillimeter Array via the ALCHEMI Large Program. To understand the conditions and associated heating mechanisms within NGC 253's dense gas, we employ Bayesian nested sampling techniques applied to chemical and radiative transfer models, which are constrained using our HCN and HNC measurements. We find that the volume density n H 2 and cosmic-ray ionization rate (CRIR) ζ are enhanced by about an order of magnitude in the galaxy’s central regions as compared to those further from the nucleus. In NGC 253's central giant molecular clouds (GMCs), where observed HCN/HNC abundance ratios are the lowest, n ∼ 105.5 cm−3 and ζ ∼ 10−12 s−1 (greater than 104 times the average Galactic rate). We find a positive correlation in the association of both density and CRIR with the number of star formation-related heating sources (supernova remnants, H ii regions, and super hot cores) located in each GMC, as well as a correlation between CRIRs and supernova rates. Additionally, we see an anticorrelation between the HCN/HNC ratio and CRIR, indicating that this ratio will be lower in regions where ζ is higher. Though previous studies suggested HCN and HNC may reveal strong mechanical heating processes in NGC 253's CMZ, we find cosmic-ray heating dominates the heating budget, and mechanical heating does not play a significant role in the HCN and HNC chemistry.
650 7a TEKNIK OCH TEKNOLOGIERx Maskinteknikx Energiteknik0 (SwePub)203042 hsv//swe
650 7a ENGINEERING AND TECHNOLOGYx Mechanical Engineeringx Energy Engineering0 (SwePub)203042 hsv//eng
650 7a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng
650 7a NATURVETENSKAPx Fysikx Atom- och molekylfysik och optik0 (SwePub)103022 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Atom and Molecular Physics and Optics0 (SwePub)103022 hsv//eng
7001 a Mangum, J. G.u National Radio Astronomy Observatory4 aut
7001 a Holdship, Jonathanu Universiteit Leiden (UL),Leiden University (UL),University College London (UCL)4 aut
7001 a Viti, Serenau University College London (UCL),Universiteit Leiden (UL),Leiden University (UL)4 aut
7001 a Harada, N.u The Graduate University for Advanced Studies (SOKENDAI),National Astronomical Observatory of Japan4 aut
7001 a Martin, S.u European Southern Observatory Santiago,Atacama Large Millimeter-submillimeter Array (ALMA)4 aut
7001 a Sakamoto, K.u Academia Sinica Taiwan4 aut
7001 a Muller, Sebastien,d 1976u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)mullers
7001 a Tanaka, Kunihikou Keio University4 aut
7001 a Nakanishi, Kouichirou The Graduate University for Advanced Studies (SOKENDAI),National Astronomical Observatory of Japan4 aut
7001 a Herrero-Illana, R.u European Southern Observatory Santiago,Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC4 aut
7001 a Yoshimura, Y.u University of Tokyo, Japan4 aut
7001 a Aladro, Rebeca,d 1979u Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut0 (Swepub:cth)aladro
7001 a Colzi, L.u Centro de Astrobiologia (CAB)4 aut
7001 a Emig, K.L.u National Radio Astronomy Observatory4 aut
7001 a Henkel, C.u Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),King Abdulaziz University4 aut
7001 a Huang, K. Y.u Universiteit Leiden (UL),Leiden University (UL)4 aut
7001 a Humire, Pedrou Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut
7001 a Meier, D. S.u National Radio Astronomy Observatory Socorro,New Mexico Institute of Mining and Technology4 aut
7001 a Rivilla, Víctor M.u Centro de Astrobiologia (CAB)4 aut
7001 a van der Werf, P.u Universiteit Leiden (UL),Leiden University (UL)4 aut
7102 a University of Virginiab National Radio Astronomy Observatory4 org
7730 t Astrophysical Journald : American Astronomical Societyg 939:2q 939:2x 1538-4357x 0004-637X
8564 u https://research.chalmers.se/publication/533437/file/533437_Fulltext.pdfx primaryx freey FULLTEXT
8564 8u https://doi.org/10.3847/1538-4357/ac91ce
8564 8u https://research.chalmers.se/publication/533437

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