Resolved HI Imaging of a Population of Massive HI-Rich Galaxies with Suppressed Star Formation
作者： Jenna J. Lemonias , David Schiminovich , Barbara Catinella , Timothy M. Heckman , Sean M. Moran
DOI: 10.1088/0004-637X/790/1/27
关键词:
摘要: Despite the existence of well-defined relationships between cold gas and star formation, there is evidence that some galaxies contain large amounts HI do not form stars efficiently. By systematically assessing link formation within a sample with extremely high masses (log M_HI/M_sun > 10), we uncover population an unexpected combination low specific rates exists primarily at stellar greater than log M_*/M_sun ~ 10.5. We obtained maps 20 in this to understand distribution physical conditions could be suppressing presence quantities HI. find all observed have surface densities range which inefficient common. The are likely main cause sSFRs, but also AGN or bulges contribute suppression formation. sample's agreement global law highlights its usefulness as tool for understanding always follow expected relationships.
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