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We present ALMA band 3 observations of the CO(6-5), CO(7-6), and [CI] 369micron emission lines in three of the highest redshift quasar host galaxies at 6.6<z<6.9. These measurements constitute the highest-redshift CO detections to date. The…

Gas in protostellar disks provides the raw material for giant planet formation and controls the dynamics of the planetesimal-building dust grains. Accurate gas mass measurements help map the observed properties of planet-forming disks onto…

Earth and Planetary Astrophysics · Physics 2017-05-31 Mo Yu , Neal J. Evans , Sarah E. Dodson-Robinson , Karen Willacy , Neal J. Turner

We examine how the atomic and molecular gas components of galaxies evolve to higher redshifts using the semi-analytic galaxy formation models of Fu et al. (2010) in which we track the surface density profiles of gas in disks. We adopt two…

Astrophysics of Galaxies · Physics 2015-06-04 Jian Fu , Guinevere Kauffmann , Cheng Li , Qi Guo

Line intensity mapping (LIM) proposes to efficiently observe distant faint galaxies and map the matter density field at high redshift. Building upon the formalism in the companion paper, we first highlight the degeneracies between cosmology…

Cosmology and Nongalactic Astrophysics · Physics 2021-06-29 Emmanuel Schaan , Martin White

We present maps of 4 galactic giant molecular clouds (GMCs) in the J=2-1 emission of both CO and $^{13}$CO. We use an LTE analysis to derive maps of the CO excitation temperature and column density and the distribution of total molecular…

Astrophysics of Galaxies · Physics 2022-09-13 John H. Bieging , Shuo Kong

We present a millimetre molecular line survey of seven high mass loss rate carbon stars in both the northern and southern skies. A total of 196 emission lines (47 transitions) from 24 molecular species were detected. The observed CO…

Astrophysics · Physics 2009-11-07 P. M. Woods , F. L. Schoeier , L. -A. Nyman , H. Olofsson

We test the ability of equilibrium galactic disk and one-zone interstellar medium models to describe the physical and emission properties of quasar hosts, submillimeter galaxies, and Lyman-alpha emitters at z>~6. The size, line widths, star…

Cosmology and Nongalactic Astrophysics · Physics 2017-03-08 Joseph A. Muñoz , Steven R. Furlanetto

We present a new method for modelling the kinematics of galaxies from interferometric observations by performing the optimization of the kinematic model parameters directly in visibility-space instead of the conventional approach of fitting…

We investigate the evolution of the gas mass fraction for galaxies in the COSMOS field using submillimetre emission from dust at 850$\mu$m. We use stacking methodologies on the 850$\mu$m S2COSMOS map to derive the gas mass fraction of…

We present James Clerk Maxwell Telescope (JCMT) observations of the $^{12}$CO(J = 2-1) emission of 42 low-mass, star-forming disk galaxies of morphological type Scd or later from the Mapping Nearby Galaxies at Apache Point Observatory…

Astrophysics of Galaxies · Physics 2026-05-12 M. Grossi , E. Corbelli , D. R. Gonçalves , E. D. Paspaliaris

This paper addresses the global molecular gas properties of a representative sample of galaxies hosting low-luminosity quasistellar objects. An abundant supply of gas is necessary to fuel both the active galactic nucleus and any…

Astrophysics · Physics 2007-06-20 T. Bertram , A. Eckart , S. Fischer , J. Zuther , C. Straubmeier , L. Wisotzki , M. Krips

Understanding the formation and evolution of the Universe is crucial for cosmological studies, and the line intensity mapping provides a powerful tool for this kind of study. We propose to make use of multipole moments of redshift-space…

Cosmology and Nongalactic Astrophysics · Physics 2020-05-20 Yan Gong , Xuelei Chen , Asantha Cooray

We present a detailed study of the molecular gas content and stellar population properties of three massive galaxies at 1 < z < 1.3 that are in different stages of quenching. The galaxies were selected to have a quiescent…

Galaxy interactions can disturb gas in galactic discs, compress it, excite it, and enhance star formation. An intriguing system likely consisting of two interacting galaxies overlapping on the line-of-sight was previously studied through…

Astrophysics of Galaxies · Physics 2026-01-14 Anaëlle Halle , Barbara Mazzilli Ciraulo , Daniel Maschmann , Anne-Laure Melchior , Françoise Combes

Star formation in strongly self-gravitating cloud cores should be similar at all redshifts, forming single or multiple stars with a range of masses determined by local magneto-hydrodynamics and gravity. The formation processes for these…

Astrophysics of Galaxies · Physics 2017-01-11 Bruce G. Elmegreen

We present the 3 mm wavelength spectra of 28 local galaxy merger remnants obtained with the Large Millimeter Telescope. Fifteen molecular lines from 13 different molecular species and isotopologues were identified, and 21 out of 28 sources…

We have computed a grid of chemical evolution models for a large set of spiral and irregular theoretical galaxies of different total mass. In our models, the gas phase has two components, the diffuse and the molecular one ($\rm H_{2}$). It…

Astrophysics · Physics 2016-08-14 Mercedes Mollá , Eduardo Hardy , '{A}ngeles I. Díaz

We investigate the multi-phase gas surrounding QSOs traced by 33 absorption lines (e.g., Ly$\alpha$, C\,\textsc{iv}, Fe\,\textsc{ii}, Mg\,\textsc{ii}, etc.) in the stacked spectra of background sources, using the early data release from the…

Astrophysics of Galaxies · Physics 2025-06-18 Zeyu Chen , Enci Wang , Hu Zou , Haoran Yu , Zhicheng He , Huiyuan Wang , Yang Gao , Cheqiu Lyu , Cheng Jia , Chengyu Ma , Weiyu Ding , Runyu Zhu , Xu Kong

The sample of nearby LIRGs and ULIRGs for which dense molecular gas tracers have been measured is building up, allowing for the study of the physical and chemical properties of the gas in the variety of objects in which the most intense…

Astrophysics · Physics 2008-11-26 J. Gracia-Carpio , S. Garcia-Burillo , P. Planesas

Molecular hydrogen is now understood to be the main coolant of the primordial gas clouds leading to the formation of the very first stars and galaxies. The line emissions associated with molecular hydrogen should then be a good tracer of…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Yan Gong , Asantha Cooray , Mario G. Santos
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