The LEGO Large Program: Constraining the Physics of Line Emission in Galaxy Observations
The IRAM Large Program LEGO studies molecular clouds in the Milky Way to constrain the physics controlling molecular line emission in galaxies. This is done by imaging two dozen clouds with setups that provide continuous spectral coverage of about 85–115 GHz. To give one example, research in this ar...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2022-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2022/09/epjconf_ism2022_00019.pdf |
| _version_ | 1811228643348709376 |
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| author | Kauffmann Jens Barnes Ashley |
| author_facet | Kauffmann Jens Barnes Ashley |
| author_sort | Kauffmann Jens |
| collection | DOAJ |
| description | The IRAM Large Program LEGO studies molecular clouds in the Milky Way to constrain the physics controlling molecular line emission in galaxies. This is done by imaging two dozen clouds with setups that provide continuous spectral coverage of about 85–115 GHz. To give one example, research in this area permits to “calibrate” extragalactic observations of molecules like HCN and N2H+ to explore how the star formation activity in galaxies depends on their dense gas contents (i.e., Gao & Solomon relation). Interestingly, LEGO and other studies now reveal a substantial cloud-to-cloud variation in line ratios. Once understood properly, this diversity can be used to constrain the properties of extragalactic molecular clouds at great detail. Here we outline the LEGO sample and describe the project status. |
| first_indexed | 2024-04-12T10:01:28Z |
| format | Article |
| id | doaj.art-f28c8658b0e54a42af05eb35819c18b9 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-04-12T10:01:28Z |
| publishDate | 2022-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-f28c8658b0e54a42af05eb35819c18b92022-12-22T03:37:34ZengEDP SciencesEPJ Web of Conferences2100-014X2022-01-012650001910.1051/epjconf/202226500019epjconf_ism2022_00019The LEGO Large Program: Constraining the Physics of Line Emission in Galaxy ObservationsKauffmann Jens0Barnes Ashley1Haystack Observatory, Massachusetts Institute of TechnologyArgelander-Institut für Astronomie, Universität BonnThe IRAM Large Program LEGO studies molecular clouds in the Milky Way to constrain the physics controlling molecular line emission in galaxies. This is done by imaging two dozen clouds with setups that provide continuous spectral coverage of about 85–115 GHz. To give one example, research in this area permits to “calibrate” extragalactic observations of molecules like HCN and N2H+ to explore how the star formation activity in galaxies depends on their dense gas contents (i.e., Gao & Solomon relation). Interestingly, LEGO and other studies now reveal a substantial cloud-to-cloud variation in line ratios. Once understood properly, this diversity can be used to constrain the properties of extragalactic molecular clouds at great detail. Here we outline the LEGO sample and describe the project status.https://www.epj-conferences.org/articles/epjconf/pdf/2022/09/epjconf_ism2022_00019.pdf |
| spellingShingle | Kauffmann Jens Barnes Ashley The LEGO Large Program: Constraining the Physics of Line Emission in Galaxy Observations EPJ Web of Conferences |
| title | The LEGO Large Program: Constraining the Physics of Line Emission in Galaxy Observations |
| title_full | The LEGO Large Program: Constraining the Physics of Line Emission in Galaxy Observations |
| title_fullStr | The LEGO Large Program: Constraining the Physics of Line Emission in Galaxy Observations |
| title_full_unstemmed | The LEGO Large Program: Constraining the Physics of Line Emission in Galaxy Observations |
| title_short | The LEGO Large Program: Constraining the Physics of Line Emission in Galaxy Observations |
| title_sort | lego large program constraining the physics of line emission in galaxy observations |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2022/09/epjconf_ism2022_00019.pdf |
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