Stored in the archives: Uncovering the CN/CO intensity ratio with ALMA in nearby U/LIRGs
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A90106%2F24%3A00616888" target="_blank" >RIV/67985815:90106/24:00616888 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1093/mnras/stad3310" target="_blank" >https://doi.org/10.1093/mnras/stad3310</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stad3310" target="_blank" >10.1093/mnras/stad3310</a>
Alternative languages
Result language
angličtina
Original language name
Stored in the archives: Uncovering the CN/CO intensity ratio with ALMA in nearby U/LIRGs
Original language description
We present an archival Atacama Large Millimeter/submillimeter Array (ALMA) study of the cyanide radical (CN) N = 1 0/carbon monoxide (CO) J = 1 0 intensity ratio in nearby (z < 0.05) ultra-luminous and luminous infrared galaxies (U/LIRGs). We identify 16 U/LIRGs that have been observed in both CN and CO lines at similar to 500 pc resolution based on 16 different ALMA projects. We measure the (CN bright)/CO and (CN bright)/(CN faint) intensity ratios at an ensemble of molecular clouds scales (CN bright = CN N = 1 0, J = 3/2 1/2, CN faint = CN N = 1 0, J = 1/2 1/2 hyperfine groupings). Our global measured (CN bright)/CO ratios range 0.02-0.15 in LIRGs and 0.08-0.17 in ULIRGs. We attribute the larger spread in LIRGs to the variety of galaxy environments included in our sample. Overall, we find that the (CN bright)/CO ratio is higher in nuclear regions, where the physical and excitation conditions favour increased CN emission relative to the disc regions. 10 out of 11 galaxies which contain well-documented active galactic nuclei show higher ratios in the nucleus compared with the disc. Finally, we measure the median resolved (CN bright)/(CN faint) ratio and use it to estimate the total integrated CN line optical depth in ULIRGs (tau similar to 0.96) and LIRGs (tau similar to 0.23). The optical depth difference is likely due to the higher molecular gas surface densities found in the more compact ULIRG systems.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
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Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Monthly Notices of the Royal Astronomical Society
ISSN
0035-8711
e-ISSN
1365-2966
Volume of the periodical
527
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
28
Pages from-to
2963-2990
UT code for WoS article
001143378500102
EID of the result in the Scopus database
2-s2.0-85178636644