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We present high spatial resolution 21 cm HI maps of the interacting galaxy pair NGC 7714/7715. We detect a massive (2 x 10**9 M(sun)) HI bridge connecting the galaxies that is parallel to but offset from the stellar bridge. A chain of HII…

天体物理学 · 物理学 2009-10-30 Beverly J. Smith , Curt Struck , Richard W. Pogge

We present the large-scale distribution and kinematics of cold molecular gas across the compact galaxy group Stephan's Quintet, based on CO(2-1) observations performed with the Atacama Compact Array (ACA) and CO(1-0) data from the Combined…

We present the first detection of a large quantity of molecular gas in the extended tail of an interacting galaxy. Using the NRAO 12m telescope, we have detected CO (1 - 0) at five locations in the eastern tail of the peculiar starburst…

天体物理学 · 物理学 2009-10-31 Beverly J. Smith , Curtis Struck , Jeffrey D. P. Kenney , Shardha Jogee

We have mapped with the IRAM interferometer at Plateau de Bure (PdBI) the 12CO emission towards intergalactic star forming regions located in the tidal tail stemming from NGC7319, in the Stephan's Quintet compact group of galaxies. The 13CO…

天体物理学 · 物理学 2009-11-10 U. Lisenfeld , J. Braine , P. -A. Duc , E. Brinks , V. Charmandaris , S. Leon

We present ALMA observations at a spatial resolution of 0.2 arcsec (60 pc) of CO emission from the Taffy galaxies (UGC 12914/5). The observations are compared with narrow-band Pa$\alpha$, mid-IR, radio continuum and X-ray imaging, plus…

Stephan's Quintet (SQ) is a system consisting of at least four interacting galaxies which is well known for its complex dynamical and star formation history. It possesses a rich intergalactic medium (IGM), where hydrogen clouds, both atomic…

We present high resolution CO J=1-0 observations of the molecular gas in the Hickson Compact Group Stephan's Quintet (HCG92). Our observations consist of multiple pointing and mosaics covering all the regions where CO and star formation has…

天体物理学 · 物理学 2009-11-13 Glen R. Petitpas , Christopher L. Taylor

Molecular gas has been searched for and found in unexpectedly large quantities in some collisional debris of interacting galaxies: HI-rich tidal tails, bridges and collisional rings. It was so far observed through millimeter observations of…

天体物理学 · 物理学 2007-10-04 Pierre-Alain Duc

We present new MeerKAT 21cm spectral line observations of the neutral hydrogen gas in the compact galaxy group Stephan's Quintet (HCG 92). These data provide a significantly improved view of the atomic gas distribution and kinematics in the…

We carried out deep mapping observations of the atomic hydrogen (HI) 21 cm line emission in a field centered on the famous galaxy group Stephan's Quintet (SQ), using the Five-hundred-meter Aperture Spherical Telescope (FAST) equipped with…

We report the discovery of very high latitude molecular gas in the edge-on spiral galaxy, NGC 5775. Emission from both the J=1-0 and 2-1 lines of 12CO is detected up to 4.8 kpc away from the mid-plane of the galaxy. NGC 5775 is known to…

天体物理学 · 物理学 2009-11-07 S. -W. Lee , E. R. Seaquist , S. Leon , S. Garcia-Burillo , J. A. Irwin

We present smoothed particle hydrodynamic models of the interactions in the compact galaxy group, Stephan's Quintet. This work is extension of the earlier collisionless N-body simulations of Renaud et al. in which the large-scale stellar…

宇宙学与河外天体物理 · 物理学 2015-05-30 Jeong-Sun Hwang , Curtis Struck , Florent Renaud , Philip Appleton

We present a new observational study of the CO(1-0) line emission as an H2 gas mass tracer under extreme conditions in extragalactic environments. Our approach is to study the full neutral interstellar medium (H2, HI and dust) of two…

宇宙学与河外天体物理 · 物理学 2015-05-13 Ming Zhu , Padeli P. Papadopoulos , Emmanuel M. Xilouris , Nario Kuno , Ute Lisenfeld

The Green Bank Telescope has been used to search for 21cm HI emission over a large area between the galaxies M31 and M33 in an attempt to confirm at 9.1 arcmin angular resolution the detection by Braun and Thilker (2004) of a very extensive…

星系天体物理 · 物理学 2015-06-05 Felix J. Lockman , Nicole L. Free , Joseph C. Shields

We report the detection of strong, resolved emission from warm H2 in the Taffy galaxies and bridge. Relative to the continuum and faint PAH emission, the H2 emission is the strongest in the connecting bridge, approaching L(H2)/L(PAH8{\mu}m)…

宇宙学与河外天体物理 · 物理学 2015-06-04 B. W. Peterson , P. N. Appleton , G. Helou , P. Guillard , T. H. Jarrett , M. E. Cluver , P. Ogle , C. Struck , F. Boulanger

We investigate the molecular gas content and the excitation and fragmentation properties in the central region of the spiral galaxy Messier 81 in both the ^{12}CO(1-0) and ^{12}CO(2-1) transitions. We have recently observed the two…

天体物理学 · 物理学 2009-11-13 V. Casasola , F. Combes , D. Bettoni , G. Galletta

CO J = 5 - 4 and J = 2 - 1 emission lines were detected towards the extremely red galaxy (ERG) HR10 (J164502+4626.4) at z=1.44. The CO intensities imply a molecular gas mass M(H2) of 1.6 x 10^{11} h^{-2}_50 solar masses, and, combined with…

天体物理学 · 物理学 2011-05-23 Paola Andreani , Andrea Cimatti , Laurent Loinard , Huub Roettgering

We present HI line and 20-cm radio continuum observations of the NGC 1511 galaxy group obtained with the Australia Telescope Compact Array. The data reveal an extended, rather disturbed HI distribution for the peculiar starburst galaxy NGC…

天体物理学 · 物理学 2009-11-10 B. Koribalski , E. Manthey

We present the HERA CO-Line Extragalactic Survey (HERACLES), an atlas of CO emission from 18 nearby galaxies that are also part of The HI Nearby Galaxy Survey (THINGS) and the Spitzer Infrared Nearby Galaxies Survey (SINGS). We used the…

宇宙学与河外天体物理 · 物理学 2010-11-02 A. K. Leroy , F. Walter , F. Bigiel , A. Usero , A. Weiss , E. Brinks , W. J. G. de Blok , R. C. Kennicutt , K. -F. Schuster , C. Kramer , H. W. Wiesemeyer , H. Roussel

We present a new high-sensitivity HI observation toward nearby spiral galaxy M101 and its adjacent 2$^{\circ}\times$ 2$^{\circ}$ region using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). From the observation, we detect…

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