First Detection of Molecular Gas in the Giant Low Surface Brightness Galaxy Malin 1

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dc.contributor.authorGalaz, Gaspar
dc.contributor.authorGonzalez-Lopez, Jorge
dc.contributor.authorGuzman, Viviana
dc.contributor.authorMessias, Hugo
dc.contributor.authorJunais, Samuel
dc.contributor.authorBoissier, Samuel
dc.contributor.authorEpinat, Benoit
dc.contributor.authorWeilbacher, Peter M.
dc.contributor.authorPuzia, Thomas
dc.contributor.authorJohnston, Evelyn J.
dc.contributor.authorAmram, Philippe
dc.contributor.authorFrayer, David
dc.contributor.authorBlana, Matias
dc.contributor.authorHowk, J. Christopher
dc.contributor.authorBerg, Michelle
dc.contributor.authorBustos-Espinoza, Roy
dc.contributor.authorMunoz-Mateos, Juan Carlos
dc.contributor.authorCortes, Paulo
dc.contributor.authorGarcia-Appadoo, Diego
dc.contributor.authorJoachimi, Katerine
dc.date.accessioned2025-01-20T16:04:40Z
dc.date.available2025-01-20T16:04:40Z
dc.date.issued2024
dc.description.abstractAfter over three decades of unsuccessful attempts, we report the first detection of molecular gas emission in Malin 1, the largest spiral galaxy observed to date, and one of the most iconic giant low surface brightness galaxies. Using Atacama Large Millimeter/submillimeter Array, we detect significant 12CO (J = 1-0) emission in the galaxy's central region and tentatively identify CO emission across three regions on the disk. These observations allow for a better estimate of the H2 mass and molecular gas mass surface density, both of which are remarkably low given the galaxy's scale. By integrating data on its H i mass, we derive a very low molecular-to-atomic gas mass ratio. Overall, our results highlight the minimal presence of molecular gas in Malin 1, contrasting sharply with its extensive, homogeneous atomic gas reservoir. For the first time, we position Malin 1 on the Kennicutt-Schmidt diagram, where it falls below the main sequence for normal spirals, consistent with previous upper limits but now with more accurate figures. These findings are crucial for constraining our understanding of star formation processes in environments characterized by extremely low molecular gas densities and for refining models of galaxy formation, thereby improving predictions concerning the formation, evolution, and distribution of these giant, elusive galaxies.
dc.fuente.origenWOS
dc.identifier.doi10.3847/2041-8213/ad8656
dc.identifier.eissn2041-8213
dc.identifier.issn2041-8205
dc.identifier.urihttps://doi.org/10.3847/2041-8213/ad8656
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/89835
dc.identifier.wosidWOS:001346263300001
dc.issue.numero2
dc.language.isoen
dc.revistaAstrophysical journal letters
dc.rightsacceso restringido
dc.titleFirst Detection of Molecular Gas in the Giant Low Surface Brightness Galaxy Malin 1
dc.typeartículo
dc.volumen975
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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