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相关论文: After the interaction: an efficiently star-forming…

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We present the first spatially resolved (~0.5 kpc) measurements of the molecular gas depletion time $\tau_{depl}$ across the disk of the interacting spiral galaxy NGC\,2276, a system with an asymmetric morphology in various SFR tracers. To…

M51 and NGC 5195 is an interacting system that can be explored in great details with ground-based telescopes. The H II regions in M51 were observed using the 2.16 m telescope of the National Astronomical Observatories of the Chinese Academy…

星系天体物理 · 物理学 2020-08-19 Peng Wei , Hu Zou , Xu Kong , Xu Zhou , Ning Hu , Zesen Lin , Yewei Mao , Lin Lin , Zhimin Zhou , Xiang Liu , Shuguo Ma , Lu Ma , Tuhong Zhong , Fei Dang , Jiantao Sun , Xinkui Lin

We studied the HST-WFPC2 observations of the inner kpc of the interacting galaxy M51 in six bands from 2550 to 8140 Angstrom. The images show an oval shaped area ("bulge") of 11x16 arcsec or 450x650 pc around the nucleus, dominated by a…

天体物理学 · 物理学 2009-11-07 H. J. G. L. M. Lamers , N. Panagia , S. Scuderi , M. Romaniello , M. Spaans , W. J. de Wit , R. Kirshner

We present Hubble Space Telescope photometry of young stars in NGC 5102, a nearby gas-rich post-starburst S0 galaxy with a bright young stellar nucleus. We use the IAC-pop/MinnIAC algorithm to derive the recent star formation history in…

宇宙学与河外天体物理 · 物理学 2015-05-18 Sylvie F. Beaulieu , Kenneth C. Freeman , Sebastian L. Hidalgo , Colin A. Norman , Peter J. Quinn

We present the results of CO interferometric observations of the southern elliptical galaxy NGC3557 with ALMA. We have detected both the CO(1-0) emission line and a relatively strong continuum at 3mm. The continuum shows a flat-spectrum…

星系天体物理 · 物理学 2019-01-09 B. Vila-Vilaro , D. Espada , P. Cortes , S. Leon , E. Pompei , J. Cepa

We present an analysis of the relationship between molecular gas and current star formation rate surface density at sub-kpc and kpc scales in a sample of 14 nearby star-forming galaxies. Measuring the relationship in the bright, high…

We studied the molecular gas properties of AzTEC/C159, a star-forming disk galaxy at $z=4.567$. We secured $^{12}$CO molecular line detections for the $J=2\to1$ and $J=5\to4$ transitions using the Karl G. Jansky VLA and the NOEMA…

We present high resolution images of the 12CO(2-1) emission in the central 1' (1 kpc) of NGC 5128 (Centaurus A), observed using the SMA. We elucidate for the first time the distribution and kinematics of the molecular gas in this region…

Post-starburst galaxies are believed to be in a rapid transition between major merger starbursts and quiescent ellipticals. Their optical spectrum is dominated by A-type stars, suggesting a starburst that was quenched recently. While…

星系天体物理 · 物理学 2023-07-26 Dalya Baron , Hagai Netzer , K. Decker French , Dieter Lutz , Ric I. Davies , J. Xavier Prochaska

Observations of the molecular gas over scales of 0.5 to several kpc provide crucial information on how gas moves through galaxies, especially in mergers and interacting systems, where it ultimately reaches the galaxy center, accumulates,…

星系天体物理 · 物理学 2016-10-19 S. König , S. Aalto , S. Muller , J. S. Gallagher , R. J. Beswick , C. K. Xu , A. Evans

We present high angular resolution (0.5-2.0") observations of the mm continuum and the 12CO(J=3-2), 13CO(J=3-2), 13CO(J=2-1), C18O(J=2-1), HCN(J=3-2), HCO+(J=4-3) and HCO+(J=3-2) line emission in the circumnuclear disk (r=100pc) of the…

We present single-dish (sub)millimeter observations of gas and dust in the Galactic high-mass star-forming region G19.61-0.23, with the aim of studying the large-scale properties and physical conditions of the molecular gas across the…

We present new J=1-0 12-CO observations along the northern spiral arm of the grand-design spiral galaxy M100 (NGC 4321), and study the distribution of molecular hydrogen as derived from these observations, comparing the new data with a set…

天体物理学 · 物理学 2007-05-23 J. H. Knapen , J. E. Beckman , J. Cepa , N. Nakai

The nearby dwarf elliptical galaxy NGC 205 offers a unique opportunity for high resolution studies of the interstellar medium in an elliptical galaxy. This paper investigates the distribution of molecular gas, molecular line ratios, and the…

天体物理学 · 物理学 2009-10-31 L. M. Young

CO(2-1) emission is often used as a tracer of the giant molecular clouds (GMCs) as an alternative to CO(1-0) emission in recent years. Therefore, understanding the environmental dependence of the line ratio of CO(2-1)/CO(1-0), $R_{21}$, on…

星系天体物理 · 物理学 2022-02-23 Fumiya Maeda , Fumi Egusa , Kouji Ohta , Yusuke Fujimoto , Asao Habe , Yoshihisa Asada

We present Herschel SPIRE-FTS intermediate-sampled mapping observations of the central ~8 kpc (~150") of M51, with a spatial resolution of 40". We detect 4 12CO transitions (J=4-3 to J=7-6) and the CI 3P2-3P1 and 3P1-3P0 transitions. We…

The relations between star formation and properties of molecular clouds are studied based on a sample of star forming regions in the Galactic Plane. Sources were selected by having radio recombination lines to provide identification of…

太阳与恒星天体物理 · 物理学 2017-03-08 Nalin Vutisalchavakul , Neal J. Evans , Mark Heyer

We report interferometric radio CO2-1 observations at a resolution of 0.7", and 0.085" resolution adaptive optics K-band spectroscopy of the inner few arcseconds of NGC7469. The CO2-1 map shows a ring of molecular clouds and a bright…

天体物理学 · 物理学 2009-11-10 R. Davies , L. Tacconi , R. Genzel

within 24 lines with 80 characters) We present ^12CO (1-0) observations in the central 4.5 kpc (1 arcmin) of the Halpha/Radio lobe galaxy NGC 3079 with the Nobeyama Millimeter Array. The molecular gas shows four components: a main disk,…

天体物理学 · 物理学 2009-11-07 J. Koda , Y. Sofue , K. Kohno , H. Nakanishi , S. Onodera , S. K. Okumura , Judith A. Irwin

We report the results of a pilot study with the EVLA of 12CO J=1-0 emission from four SMGs at z=2.2-2.5, each with an existing detection of CO J=3-2. Using the EVLA's most compact configuration we detect strong, broad J=1-0 line emission…

宇宙学与河外天体物理 · 物理学 2015-05-19 R. J. Ivison , P. P. Papadopoulos , Ian Smail , T. R. Greve , A. P. Thomson , E. M. Xilouris , S. C. Chapman