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We present new VLA C+D-array HI observations and optical and NIR imaging of the well known interacting system NGC 4038/9, ``The Antennae''. The radio data reveal a wealth of gaseous sub-structure both within the main bodies of the galaxies…

Astrophysics · Physics 2009-11-07 J. E. Hibbard , J. M. van der Hulst , J. E. Barnes , R. M. Rich

We have used the Hubble Space Telescope and Wide Field Planetary Camera 2 to image the putative tidal dwarf galaxy located at the tip of the Southern tidal tail of NGC 4038/9, the Antennae. We resolve individual stars, and identify two…

Astrophysics · Physics 2009-11-10 I. Saviane , J. Hibbard , R. M. Rich

We study a gas rich merging dwarf system KUG 0200-096. Deep optical image reveals an optically faint tail with a length of 20 kpc, giving a visual impression of tidal antenna similar to NGC 4038/39. The interacting dwarf galaxies have…

Astrophysics of Galaxies · Physics 2018-10-10 Sanjaya Paudel , Chandreyee Sengupta , Suk Jin Yoon

NGC 4441 is a candidate for a merger between a spiral and an elliptical galaxy (S+E merger), because it shows typical tidal structures such as an optical tail and two shells. With a far-infrared luminosity of $\sim 5\cdot 10^9 L_{\odot}$…

Astrophysics · Physics 2009-11-13 Eva Manthey , Susanne Aalto , Susanne Huettemeister , Tom A. Oosterloo

We present results from our Giant Metrewave Radio Telescope (GMRT) HI observations of the Arp 305 system. The system consists of two interacting spiral galaxies NGC 4016 and NGC 4017, a large amount of resultant tidal debris and a prominent…

Astrophysics of Galaxies · Physics 2017-06-28 C. Sengupta , T. C. Scott , S. Paudel , K. S. Dwarakanath , D. J. Saikia , B. W. Sohn

We present a study of the magnetic field properties of NGC 4038/9 (the `Antennae' galaxies), the closest example of a late stage merger of two spiral galaxies. Wideband polarimetric observations were performed using the Karl G. Jansky Very…

Astrophysics of Galaxies · Physics 2016-09-21 Aritra Basu , S. A. Mao , Amanda A. Kepley , Timothy Robishaw , Ellen G. Zweibel , John. S. Gallagher

We present results from GMRT HI 21 cm line observations of the interacting galaxy pair Arp 181 (NGC 3212 and NGC 3215) at z =0.032. We find almost all of the detected HI (90%) displaced well beyond the optical disks of the pair with the…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Chandreyee Sengupta , K. S. Dwarakanath , D. J. Saikia , T. C. Scott

We present the results of Giant Metrewave Radio Telescope (GMRT) observations of the interacting system Arp86 in both neutral atomic hydrogen, HI, and in radio continuum at 240, 606 and 1394 MHz. In addition to HI emission from the two…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 Chandreyee Sengupta , K. S. Dwarakanath , D. J. Saikia

We report the results of an X-ray spectral imaging observation of the Antennae with the ROSAT PSPC. 55% of the soft X-ray flux from the system is resolved into discrete sources, including components identified with the galactic nuclei and…

Astrophysics · Physics 2015-06-24 A. M. Read , T. J. Ponman , R. D. Wolstencroft

We report the discovery of a 100 kpc HI tail in the merging galaxy pair NGC 4490/85 detected by the Five-Hundred-meter Aperture Spherical radio Telescope (FAST). The tidal tails extended in both the south and north directions, and they are…

Astrophysics of Galaxies · Physics 2023-05-10 Yao Liu , Ming Zhu , Haiyang Yu , Mei Ai , Peng Jiang , Siqi Liu , Ruilei Zhou , Lixia Yuan

Among the various phenomena observed in interacting galaxies is the ejection due to tidal forces of material into the intergalactic medium and its subsequent rearranging which can lead to the formation of self-gravitating tidal dwarf…

Astrophysics · Physics 2014-10-13 P. -A. Duc , E. Brinks , V. Springel , B. Pichardo , P. Weilbacher , I. F. Mirabel

We present a ~ 1" (100 pc) resolution 12CO (3-2) map of the nearby intermediate stage interacting galaxy pair NGC 4038/9 (the Antennae galaxies) obtained with the Submillimeter Array. We find that half the CO (3-2) emission originates in…

We present results from our Giant Metrewave Radio Telescope (GMRT) HI observations of the interacting pair Arp 202 (NGC 2719 and NGC 2719A). Earlier deep UV(GALEX) observations of this system revealed a tidal tail like extension with a…

Astrophysics of Galaxies · Physics 2015-06-22 Chandreyee Sengupta , T. C. Scott , K. S. Dwarakanath , D. J. Saikia , B. W. Sohn

We present new HI observations from the Australia Telescope Compact Array and deep optical imaging from OmegaCam on the VLT Survey Telescope of NGC 1427A, an arrow-shaped dwarf irregular galaxy located in the Fornax cluster. The data reveal…

We present results from our Giant Metrewave Radio Telescope (GMRT) HI, Himalayan Chandra Telescope (HCT) Halpha, 1m Sampurnanand Telescope (ST) and 1.3m Devasthal Fast Optical Telescope (DFOT) deep optical observations of NGC 7805/6 (Arp…

Context: Pre-merger interactions between galaxies can induce significant changes in the morphologies and kinematics of the stellar and ISM components. Large amounts of gas and stars are often found to be disturbed or displaced as tidal…

Astrophysics of Galaxies · Physics 2015-12-16 Chandreyee Sengupta , Thomas. C. Scott , Sanjaya Paudel , D. J. Saikia , K. S. Dwarakanath , B. W. Sohn

The "Antennae Galaxy" (NGC 4038/39) is the closest major interacting galaxy system and therefore often taken as merger prototype. We present the first comprehensive integral field spectroscopic dataset of this system, observed with the MUSE…

We present Gemini Multi-Object Spectrograph (GMOS) spectra of HI-rich tidal features located around the outskirts of two interacting galaxy pairs, NGC 3166/9 and NGC 4725/47. These follow-up observations are part of a multi-wavelength…

Astrophysics of Galaxies · Physics 2018-08-08 K. Lee-Waddell , J. P. Madrid , K. Spekkens , C. J. Donzelli , B. S. Koribalski , P. Serra , J. Cannon

The peculiar spiral NGC 2782 is the result of a minor merger with a mass ratio ~4:1 occurring ~200 Myr ago. This merger produced a molecular and HI rich, optically bright Eastern tail and an HI-rich, optically faint Western tail.…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 Karen Knierman , Paul Scowen , Todd Veach , Christopher Groppi , Brendan Mullan , Iraklis Konstantopoulos , Patricia M. Knezek , Jane Charlton

A mosaic of six HI line observations with the Australia Telescope Compact Array is used to search for intergalactic gas in the NGC 1808 group of galaxies. Within the field of view of about 1.4 deg x 1.2 deg, no emission from intergalactic…

Astrophysics · Physics 2009-11-06 Michael Dahlem , Matthias Ehle , Stuart D. Ryder
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