2020
DOI: 10.1051/0004-6361/201936768
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The Lyman Alpha Reference Sample

Abstract: Context. Lyman-α (Lyα) is the brightest emission line in star-forming galaxies. However, its interpretation in terms of physical properties is hampered by the resonant nature of Lyα photons. In order to remedy this complicated situation, the Lyman Alpha Reference Sample (LARS) was defined, enabling the study of Lyα production and escape mechanisms in 14 local star-forming galaxies. Aims. With this paper, we complement our efforts and study the global dust and (molecular) gas content as well as the properties o… Show more

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Cited by 15 publications
(10 citation statements)
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“…The distribution of R CO,max /R 25 for our sample, shown in the left panel of Figure 2, has a range of 0.26−1.2, and median of 0.72. Our data thus probe out to ∼3.6 CO scale lengths (following Schruba et al 2011), thereby characterizing ∼90% of the total CO emission (Schruba et al 2011;Puschnig et al 2020). Moreover, our maps typically probe beyond radii where the rotation curve flattens out (which happens on average within 0.1 R 25 , as discussed in Section 4.4.1).…”
Section: Radial Extent Of the Co Emissionsupporting
confidence: 60%
“…The distribution of R CO,max /R 25 for our sample, shown in the left panel of Figure 2, has a range of 0.26−1.2, and median of 0.72. Our data thus probe out to ∼3.6 CO scale lengths (following Schruba et al 2011), thereby characterizing ∼90% of the total CO emission (Schruba et al 2011;Puschnig et al 2020). Moreover, our maps typically probe beyond radii where the rotation curve flattens out (which happens on average within 0.1 R 25 , as discussed in Section 4.4.1).…”
Section: Radial Extent Of the Co Emissionsupporting
confidence: 60%
“…Future observations of the presence of such turbulent motions (e.g. Herenz et al 2016;Puschnig et al 2020) and outflows in low-mass galaxies that are not strong LAEs could test this scenario.…”
Section: Systematic Variations In 𝑓 Escly𝛼mentioning
confidence: 98%
“…The dependence on the CO brightness makes α CO sensitive to varying environmental properties, such as diverse density and temperature of the molecular gas. This is even more true in ULIRGs, where starbursting regions would make the molecular gas denser and hotter, thus resulting in brighter CO emission (and thus lower α CO ; for further details, see also the Appendix in Puschnig et al 2020). We obtained α CO values in the range α CO =0.6-5.2 M pc −2 (K km s −1 ) −1 , with ∼90% of the sample (29/33 objects) having a α CO between 1.1 and 4.3 M pc −2 (K km s −1 ) −1 , i.e., the α CO usually adopted for AGN and Milky-way like galaxies, respectively.…”
Section: The Molecular Gas Contentmentioning
confidence: 99%