影响因子：5.8
DOI码：10.3847/1538-4357/abd7f6
发表刊物：The Astrophysical Journal
摘要：We use Atacama Large Millimeter/submillimeter Array CO (2-1) observations of six low-redshift Palomar-Green quasars to study the distribution and kinematics of the molecular gas of their host galaxies at kiloparsec-scale resolution. While the molecular gas content, molecular gas fraction, and star formation rates are similar to those of nearby massive, star-forming galaxies, the quasar host galaxies possess exceptionally compact, disky molecular gas distributions with a median half-light radius of 1.8 kpc and molecular gas mass surface densities ≳22 M⊙ pc-2. While the overall velocity field of the molecular gas is dominated by regular rotation out to large radii, with ratio of rotation velocity to velocity dispersion ≳9, the nuclear region displays substantial kinematic complexity associated with small-scale substructure in the gas distribution. A tilted-ring analysis reveals that the kinematic and photometric position angles are misaligned on average by ∼ 34° ± 26° and provides evidence of kinematic twisting. These observations provide tantalizing clues to the detailed physical conditions of the circumnuclear environments of actively accreting supermassive black holes.
合写作者：Ran Wang, Jinyi Shangguan, Luis C. Ho, Franz E. Bauer, Ezequiel Treister, and Yali Shao
第一作者：Juan Molina
卷号：908
期号：2
页面范围：231
是否译文：否
发表时间：2021-02-25
收录刊物：SCI
发布期刊链接：https://iopscience.iop.org/article/10.3847/1538-4357/abd7f6