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相关论文: ALMA Resolves Giant Molecular Clouds in a Tidal Dw…

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We present the highest spatial resolution (~0.5") CO (3-2) observations to date of the "overlap" region in the merging Antennae galaxies (NGC 4038/39), taken with the ALMA. We report on the discovery of a long (3 kpc), thin (aspect ratio…

In a series of papers, we present detailed chemo-dynamical simulations of tidal dwarf galaxies (TDGs). After the first paper, where we focused on the very early evolution, we present in this work simulations on the long-term evolution of…

星系天体物理 · 物理学 2015-06-23 Sylvia Ploeckinger , Simone Recchi , Gerhard Hensler , Pavel Kroupa

We report molecular gas mass estimates obtained from a stacking analysis of CO line emission in the ALMA Spectroscopic Survey (ASPECS) using the spectroscopic redshifts from the optical integral field spectroscopic survey by the Multi Unit…

Using the Atacama Large Millimeter/submillimeter Array, we have made the first high spatial and spectral resolution observations of the molecular gas and dust in the prototypical blue compact dwarf galaxy II Zw 40. The CO(2-1) and CO(3-2)…

星系天体物理 · 物理学 2016-09-07 Amanda A. Kepley , Adam K. Leroy , Kelsey E. Johnson , Karin Sandstrom , C. -H. Rosie Chen

We present a two-zone theory for feedback-regulated star formation in galactic discs, consistently connecting the galaxy-averaged star formation law with star formation proceeding in giant molecular clouds (GMCs). Our focus is on galaxies…

宇宙学与河外天体物理 · 物理学 2015-06-12 C. -A. Faucher-Giguere , E. Quataert , P. F. Hopkins

The content and distribution of cool interstellar medium (ISM, <30K) can indicate the evolutionary mechanisms that transform late type to early type galaxies (ETGs). To investigate this, ALMA observations of 12CO[2-1] line emission were…

星系天体物理 · 物理学 2022-10-26 David H. W. Glass , Anne E. Sansom , Timothy A. Davis , Cristina C. Popescu

We describe ongoing work on a new method that allows one to determine the mass and relative position (in galactocentric radius and azimuth) of galactic companions purely from analysis of observed disturbances in gas disks. Here, we…

宇宙学与河外天体物理 · 物理学 2015-05-20 Sukanya Chakrabarti , Frank Bigiel , Philip Chang , Leo Blitz

We present the first results of the Galaxy Activity, Torus and Outflow Survey (GATOS), a project aimed at understanding the properties of the dusty molecular tori and their connection to the host galaxy in nearby Seyfert galaxies. Our…

We analyse the results of four simulations of isolated galaxies: two with a rigid spiral potential of fixed pattern speed, but with different degrees of star-formation induced feedback, one with an axisymmetric galactic potential and one…

星系天体物理 · 物理学 2015-06-05 C. L. Dobbs , J. E. Pringle , A. Burkert

Contemporary galactic star formation occurs predominantly within gravitationally unstable, cold, dense molecular gas within supersonic, turbulent, magnetized giant molecular clouds (GMCs). Significantly, because the chemical evolution…

太阳与恒星天体物理 · 物理学 2013-02-11 Avinash Kumar , Robert T. Fisher

We present the first attempt at measuring the production rate of tidal dwarf galaxies (TDGs) and estimating their contribution to the overall dwarf population. Using HST/ACS deep imaging data from GOODS and GEMS surveys in conjunction with…

宇宙学与河外天体物理 · 物理学 2015-05-27 Zhang-Zheng Wen , Xian-Zhong Zheng , Ying-He Zhao , Yu Gao

We present the detection analysis of a diffuse molecular cloud at z$_{abs}$=2.4636 towards the quasar SDSS J1513+0352(z$_{em}\,\simeq$ 2.68) observed with the X-shooter spectrograph(VLT). We measure very high column densities of atomic and…

We measure the velocity dispersion, $\sigma$, and surface density, $\Sigma$, of the molecular gas in nearby galaxies from CO spectral line cubes with spatial resolution $45$-$120$ pc, matched to the size of individual giant molecular…

Minor mergers frequently occur between giant and gas-rich low mass galaxies and can provide significant amounts of interstellar matter to refuel star formation and power AGN in the giant systems. Major starbursts and/or AGN result when…

宇宙学与河外天体物理 · 物理学 2015-06-15 S. König , S. Aalto , S. Muller , R. J. Beswick , J. S. Gallagher

The Taffy Galaxies system, UGC 12914/5, contains huge amounts of molecular gas in the bridge region between the receding spirals after a direct collision. $2 - 9 \times 10^9$M$_\odot$ of molecular gas is present between the galaxies, more…

天体物理学 · 物理学 2009-11-10 J. Braine , E. Davoust , M. Zhu , Ute Lisenfeld , C. Motch , E. R. Seaquist

We present results from a survey of dwarf galaxy candidates in the vicinity of strongly interacting galaxies. The goal of the survey was a test of the hypothesis that massive condensations of stars and HI in tidal tails of large interacting…

天体物理学 · 物理学 2011-05-23 E. J. Delgado-Donate , C. Munoz-Tunon , H. J. Deeg , J. Iglesias-Paramo

Aims: We characterize the molecular gas content using CO emission of a redshift-limited subsample of isolated galaxies from the AMIGA (Analysis of the interstellar Medium of Isolated GAlaxies) project. Methods: We present the 12CO(1-0) data…

宇宙学与河外天体物理 · 物理学 2015-05-30 U. Lisenfeld , D. Espada , L. Verdes-Montenegro , N. Kuno , S. Leon , J. Sabater , N. Sato , J. Sulentic , S. Verley , M. S. Yun

We present results of 12CO (1--0) and 13CO (1--0) observations of the northeastern spiral arm segment of IC 342 with a ~50pc resolution carried out with the Nobeyama Millimeter Array. Zero-spacing components were recovered by combining with…

宇宙学与河外天体物理 · 物理学 2015-05-28 Akihiko Hirota , Nario Kuno , Naoko Sato , Hiroyuki Nakanishi , Tomoka Tosaki , Kazuo Sorai

We have carried out sub-mm 12CO(J=3-2) observations of 6 giant molecular clouds (GMCs) in the Large Magellanic Cloud (LMC) with the ASTE 10m sub-mm telescope at a spatial resolution of 5 pc and very high sensitivity. We have identified 32…

We present 0.3" (band 6) and 1.5" (band 3) ALMA observations of the (sub)millimeter dust continuum emission for 25 radio galaxies at 1<z<5.2. Our survey reaches a rms flux density of ~50$\mu$Jy in band 6 and ~20$\mu$Jy in band 3. This is an…