High resolution spectral imaging of CO(7–6), [CI](2–1), and continuum of three high- z lensed dusty star-forming galaxies using ALMA
High-redshift dusty star-forming galaxies with very high star formation rates (500−3000 M⊙ yr⁻¹) are key to understanding the formation of the most extreme galaxies in the early Universe. Characterising the gas reservoir of these systems can reveal the driving factor behind the high star formation....
Published in: | Astronomy & Astrophysics |
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Format: | Article in Journal/Newspaper |
Language: | English |
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EDP Sciences
2022
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Online Access: | https://doi.org/10.1051/0004-6361/202142172 https://nrc-publications.canada.ca/eng/view/ft/?id=eae97d55-d6ae-41c7-a966-3cce4a31004b https://nrc-publications.canada.ca/eng/view/object/?id=eae97d55-d6ae-41c7-a966-3cce4a31004b https://nrc-publications.canada.ca/fra/voir/objet/?id=eae97d55-d6ae-41c7-a966-3cce4a31004b |
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ftnrccanada:oai:cisti-icist.nrc-cnrc.ca:cistinparc:eae97d55-d6ae-41c7-a966-3cce4a31004b 2024-01-14T10:10:46+01:00 High resolution spectral imaging of CO(7–6), [CI](2–1), and continuum of three high- z lensed dusty star-forming galaxies using ALMA Gururajan, G. Béthermin, M. Theulé, P. Spilker, J. S. Aravena, M. Archipley, M. A. Chapman, S. C. De Breuck, C. Gonzalez, A. Hayward, C. C. Hezaveh, Y. Hill, R. Jarugula, S. Litke, K. C. Malkan, M. Marrone, D. P. Narayanan, D. Phadke, K. A. Reuter, C. Vieira, J. D. Vizgan, D. Weiß, A. 2022-07-04 text https://doi.org/10.1051/0004-6361/202142172 https://nrc-publications.canada.ca/eng/view/ft/?id=eae97d55-d6ae-41c7-a966-3cce4a31004b https://nrc-publications.canada.ca/eng/view/object/?id=eae97d55-d6ae-41c7-a966-3cce4a31004b https://nrc-publications.canada.ca/fra/voir/objet/?id=eae97d55-d6ae-41c7-a966-3cce4a31004b eng eng EDP Sciences issn:0004-6361 issn:1432-0746 Astronomy & Astrophysics, Volume: 663, Publication date: 2022-07-04 doi:10.1051/0004-6361/202142172 pii:aa42172-21 Creative Commons, Attribution 4.0 International (CC BY 4.0) (https://creativecommons.org/licenses/by/4.0/) Creative Commons, Attribution 4.0 International (CC BY 4.0) (https://creativecommons.org/licenses/by/4.0/deed.fr) galaxies: high-redshift galaxies: evolution galaxies: ISM galaxies: kinematics and dynamics galaxies: star formation submillimeter: galaxies article 2022 ftnrccanada https://doi.org/10.1051/0004-6361/202142172 2023-12-17T00:02:12Z High-redshift dusty star-forming galaxies with very high star formation rates (500−3000 M⊙ yr⁻¹) are key to understanding the formation of the most extreme galaxies in the early Universe. Characterising the gas reservoir of these systems can reveal the driving factor behind the high star formation. Using molecular gas tracers such as, high-J CO lines, neutral carbon lines, and the dust continuum, we can estimate the gas density and radiation field intensity in their interstellar media. In this paper, we present high resolution (∼0.4″) observations of CO(7−6), [CI](2−1), and dust continuum of three lensed galaxies from the South pole telescope – sub-millimetre galaxies (SPT-SMG) sample at z ∼ 3 with the Atacama Large Millimetre/submillimetre Array. Our sources have high intrinsic star formation rates (> 850 M⊙ yr⁻¹) and rather short depletion timescales (< 100 Myr). Based on the L[CI](2−1)/LCO(7 − 6) and L[CI](2−1)/LIR ratios, our galaxy sample has similar radiation field intensities and gas densities compared to other submillimetre galaxies. We performed visibility-based lens modelling on these objects to reconstruct the kinematics in the source plane. We find that the cold gas masses of the sources are compatible with simple dynamical mass estimates using ULIRG-like values of the CO-H₂ conversion factor αCO, but not Milky Way-like values. We find diverse source kinematics in our sample: SPT0103−45 and SPT2147−50 are likely rotating disks, while SPT2357−51 is possibly a major merger. The analysis presented in the paper could be extended to a larger sample to determine better statistics of morphologies and interstellar medium properties of high-z dusty star-forming galaxies. Peer reviewed: Yes NRC publication: Yes Article in Journal/Newspaper South pole National Research Council Canada: NRC Publications Archive Milky Way ENVELOPE(-68.705,-68.705,-71.251,-71.251) South Pole Astronomy & Astrophysics 663 A22 |
institution |
Open Polar |
collection |
National Research Council Canada: NRC Publications Archive |
op_collection_id |
ftnrccanada |
language |
English |
topic |
galaxies: high-redshift galaxies: evolution galaxies: ISM galaxies: kinematics and dynamics galaxies: star formation submillimeter: galaxies |
spellingShingle |
galaxies: high-redshift galaxies: evolution galaxies: ISM galaxies: kinematics and dynamics galaxies: star formation submillimeter: galaxies Gururajan, G. Béthermin, M. Theulé, P. Spilker, J. S. Aravena, M. Archipley, M. A. Chapman, S. C. De Breuck, C. Gonzalez, A. Hayward, C. C. Hezaveh, Y. Hill, R. Jarugula, S. Litke, K. C. Malkan, M. Marrone, D. P. Narayanan, D. Phadke, K. A. Reuter, C. Vieira, J. D. Vizgan, D. Weiß, A. High resolution spectral imaging of CO(7–6), [CI](2–1), and continuum of three high- z lensed dusty star-forming galaxies using ALMA |
topic_facet |
galaxies: high-redshift galaxies: evolution galaxies: ISM galaxies: kinematics and dynamics galaxies: star formation submillimeter: galaxies |
description |
High-redshift dusty star-forming galaxies with very high star formation rates (500−3000 M⊙ yr⁻¹) are key to understanding the formation of the most extreme galaxies in the early Universe. Characterising the gas reservoir of these systems can reveal the driving factor behind the high star formation. Using molecular gas tracers such as, high-J CO lines, neutral carbon lines, and the dust continuum, we can estimate the gas density and radiation field intensity in their interstellar media. In this paper, we present high resolution (∼0.4″) observations of CO(7−6), [CI](2−1), and dust continuum of three lensed galaxies from the South pole telescope – sub-millimetre galaxies (SPT-SMG) sample at z ∼ 3 with the Atacama Large Millimetre/submillimetre Array. Our sources have high intrinsic star formation rates (> 850 M⊙ yr⁻¹) and rather short depletion timescales (< 100 Myr). Based on the L[CI](2−1)/LCO(7 − 6) and L[CI](2−1)/LIR ratios, our galaxy sample has similar radiation field intensities and gas densities compared to other submillimetre galaxies. We performed visibility-based lens modelling on these objects to reconstruct the kinematics in the source plane. We find that the cold gas masses of the sources are compatible with simple dynamical mass estimates using ULIRG-like values of the CO-H₂ conversion factor αCO, but not Milky Way-like values. We find diverse source kinematics in our sample: SPT0103−45 and SPT2147−50 are likely rotating disks, while SPT2357−51 is possibly a major merger. The analysis presented in the paper could be extended to a larger sample to determine better statistics of morphologies and interstellar medium properties of high-z dusty star-forming galaxies. Peer reviewed: Yes NRC publication: Yes |
format |
Article in Journal/Newspaper |
author |
Gururajan, G. Béthermin, M. Theulé, P. Spilker, J. S. Aravena, M. Archipley, M. A. Chapman, S. C. De Breuck, C. Gonzalez, A. Hayward, C. C. Hezaveh, Y. Hill, R. Jarugula, S. Litke, K. C. Malkan, M. Marrone, D. P. Narayanan, D. Phadke, K. A. Reuter, C. Vieira, J. D. Vizgan, D. Weiß, A. |
author_facet |
Gururajan, G. Béthermin, M. Theulé, P. Spilker, J. S. Aravena, M. Archipley, M. A. Chapman, S. C. De Breuck, C. Gonzalez, A. Hayward, C. C. Hezaveh, Y. Hill, R. Jarugula, S. Litke, K. C. Malkan, M. Marrone, D. P. Narayanan, D. Phadke, K. A. Reuter, C. Vieira, J. D. Vizgan, D. Weiß, A. |
author_sort |
Gururajan, G. |
title |
High resolution spectral imaging of CO(7–6), [CI](2–1), and continuum of three high- z lensed dusty star-forming galaxies using ALMA |
title_short |
High resolution spectral imaging of CO(7–6), [CI](2–1), and continuum of three high- z lensed dusty star-forming galaxies using ALMA |
title_full |
High resolution spectral imaging of CO(7–6), [CI](2–1), and continuum of three high- z lensed dusty star-forming galaxies using ALMA |
title_fullStr |
High resolution spectral imaging of CO(7–6), [CI](2–1), and continuum of three high- z lensed dusty star-forming galaxies using ALMA |
title_full_unstemmed |
High resolution spectral imaging of CO(7–6), [CI](2–1), and continuum of three high- z lensed dusty star-forming galaxies using ALMA |
title_sort |
high resolution spectral imaging of co(7–6), [ci](2–1), and continuum of three high- z lensed dusty star-forming galaxies using alma |
publisher |
EDP Sciences |
publishDate |
2022 |
url |
https://doi.org/10.1051/0004-6361/202142172 https://nrc-publications.canada.ca/eng/view/ft/?id=eae97d55-d6ae-41c7-a966-3cce4a31004b https://nrc-publications.canada.ca/eng/view/object/?id=eae97d55-d6ae-41c7-a966-3cce4a31004b https://nrc-publications.canada.ca/fra/voir/objet/?id=eae97d55-d6ae-41c7-a966-3cce4a31004b |
long_lat |
ENVELOPE(-68.705,-68.705,-71.251,-71.251) |
geographic |
Milky Way South Pole |
geographic_facet |
Milky Way South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
issn:0004-6361 issn:1432-0746 Astronomy & Astrophysics, Volume: 663, Publication date: 2022-07-04 doi:10.1051/0004-6361/202142172 pii:aa42172-21 |
op_rights |
Creative Commons, Attribution 4.0 International (CC BY 4.0) (https://creativecommons.org/licenses/by/4.0/) Creative Commons, Attribution 4.0 International (CC BY 4.0) (https://creativecommons.org/licenses/by/4.0/deed.fr) |
op_doi |
https://doi.org/10.1051/0004-6361/202142172 |
container_title |
Astronomy & Astrophysics |
container_volume |
663 |
container_start_page |
A22 |
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1788065586847154176 |