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ALMA observations of CS in NGC 1068: chemistry and excitation
Indexado
WoS WOS:000574923200091
Scopus SCOPUS_ID:85095460582
DOI 10.1093/MNRAS/STAA1891
Año 2020
Tipo artículo de investigación

Citas Totales

Autores Afiliación Chile

Instituciones Chile

% Participación
Internacional

Autores
Afiliación Extranjera

Instituciones
Extranjeras


Abstract



We present results from Atacama Large Millimeter/submillimeter Array (ALMA) observations of CS from the nearby galaxy NGC 1068 (similar to 14 Mpc). This Seyfert 2 barred galaxy possesses a circumnuclear disc (CND, r similar to 200 pc) and a starburst ring (SB ring, r similar to 1.3 kpc). These high-resolution maps (similar to 0.5 arcsec, similar to 35 pc) allow us to analyse specific sub-regions in the galaxy and investigate differences in line intensity ratios and physical conditions, particularly those between the CND and SB ring. Local thermodynamic equilibrium (LTE) analysis of the gas is used to calculate CS densities in each sub-region, followed by the non-LTE analysis conducted using the radiative transfer code RADEX to fit observations and constrain gas temperature, CS column density and hydrogen density. Finally, the chemical code UCLCHEM is used to reconstruct the gas, allowing an insight into its origin and chemical history. The density of hydrogen in the CND is found to be >= 10(5) cm(-2), although exact values vary, reaching 10(6) cm(-2) at the active galactic nucleus. The conditions in the two arms of the SB ring appear similar to one another, though the density found (similar to 10(4) cm(-2)) is lower than in the CND. The temperature in the CND increases from east to west, and is also overall greater than found in the SB ring. These modelling methods indicate the requirement for multiphase gas components in order to fit the observed emission over the galaxy. A larger number of high-resolution transitions across the SLED may allow for further constraining of the conditions, particularly in the SB ring.

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Disciplinas de Investigación



WOS
Astronomy & Astrophysics
Scopus
Sin Disciplinas
SciELO
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Publicaciones WoS (Ediciones: ISSHP, ISTP, AHCI, SSCI, SCI), Scopus, SciELO Chile.

Colaboración Institucional



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Autores - Afiliación



Ord. Autor Género Institución - País
1 Scourfield, M. - UCL - Reino Unido
University College London - Reino Unido
2 Viti, Serena Mujer UCL - Reino Unido
University College London - Reino Unido
3 Garcia-Burillo, S. Hombre Observ Madrid - España
Observatorio Astronomico Nacional - España
4 Saintonge, Amelie Mujer UCL - Reino Unido
University College London - Reino Unido
5 Combes, Francoise Mujer CNRS - Francia
CNRS Centre National de la Recherche Scientifique - Francia
6 Fuente, Asuncion - Observ Madrid - España
Observatorio Astronomico Nacional - España
7 Henkel, C. Hombre Mar Planck Inst Radioastron - Alemania
King Abdulaziz Univ - Arabia Saudí
Max Planck Institute for Radio Astronomy - Alemania
King Abdulaziz University - Arabia Saudí
8 Alonso Herrero, Almudena Mujer Ctr Astrobiol CSIC INTA - España
Centro de Astrobiología (CSIC-INTA) - España
CSIC-INTA - Centro de Astrobiología (CAB) - España
9 Harada, Nanase - Acad Sinica - Taiwán
Academia Sinica, Institute of Astronomy and Astrophysics - Taiwán
10 Takano, Shuro - Nihon Univ - Japón
Nihon University - Japón
11 Nakajima, T. - Nagoya Univ - Japón
Nagoya University - Japón
12 Martin, S. - ESO - Chile
Atacama Large Millimeter Array - Chile
European Southern Observatory Santiago - Chile
Atacama Large Millimeter-submillimeter Array - Chile
13 Krips, M. - Inst Radio Astron Millimetr IRAM - Francia
IRAM Institut de RadioAstronomie Millimétrique - Francia
14 van der Werf, Paul P. Hombre Leiden Univ - Países Bajos
Leiden Observatory Research Institute - Países Bajos
Sterrewacht Leiden - Países Bajos
15 Aalto, Susanne Mujer Chalmers Univtechnol - Suecia
Chalmers University of Technology, Onsala Space Observatory - Suecia
Chalmers University of Technology - Suecia
16 Usero, Antonio Hombre Observ Madrid - España
Observatorio Astronomico Nacional - España
17 Kohno, Kotaro Hombre Univ Tokyo - Japón
The University of Tokyo - Japón
Research Center for the Early Universe - Japón

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Financiamiento



Fuente
National Science Foundation
ASIAA
Korea Astronomy and Space Science Institute
National Radio Astronomy Observatory
National Institutes of Natural Sciences
National Research Council Canada
Ministry of Science and Technology, Taiwan
National Astronomical Observatory of Japan
JAO
Associated Universities
Australian Diabetes Society
Unidad de Excelencia "Maria de Maeztu"- Centro de Astrobiologia (INTA-CSIC)
MCIU/AEI/FEDER, UE

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Agradecimientos



Agradecimiento
SGB, AA-H, and AU acknowledge support from grant - PGC2018094671-B-I00 (MCIU/AEI/FEDER, UE). AAH work was done under project No. MDM-2017-0737 Unidad de Excelencia "Maria de Maeztu"- Centro de Astrobiologia (INTA-CSIC).
SGB, AA-H, and AU acknowledge support from grant - PGC2018094671-B-I00 (MCIU/AEI/FEDER, UE). AAH work was done under project No. MDM-2017-0737 Unidad de Excelencia "Maria de Maeztu"- Centro de Astrobiologia (INTA-CSIC).
This paper makes use of the following ALMA data: ADS/JAO.ALMA#2011.0.00083.S, ADS/JAO.ALMA#2013.1.00055.S, ADS/JAO.ALMA#2015.1.01144.S. ALMA is a partnership of European Southern Observatory (ESO) (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO, and NAOJ. SGB, AA-H, and AU acknowledge support from grant-PGC2018-094671-B-I00 (MCIU/AEI/FEDER, UE). AAH work was done under project No. MDM-2017-0737 Unidad de Excelencia "María de Maeztu"-Centro de Astrobiología (INTA-CSIC). The authors would like to thank the anonymous referee for constructive comments that improved the original version of the paper.

Muestra la fuente de financiamiento declarada en la publicación.