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15 papers · 2 filters
Velocity resolved [CII] spectroscopy of the center and the BCLMP302 region of M33 (HerM33es)
B. Mookerjea, F. Israel, C. Kramer +8
We aim to understand the contribution of the ionized, atomic and molecular phases of the ISM to the [CII] emission from clouds near the dynamical center and the BCLMP302 HII region…
A Giant Metrewave Radio Telescope search for associated HI 21cm absorption in high-redshift flat-spectrum sources
J. N. H. S. Aditya, Nissim Kanekar, Sushma Kurapati
We report results from a Giant Metrewave Radio Telescope search for "associated" redshifted HI 21cm absorption from 24 active galactic nuclei (AGNs), at , selected f…
A new constraint on the molecular oxygen abundance at
Nissim Kanekar, David S. Meier
We report Karl G. Jansky Very Large Array (VLA) and Atacama Large Millimeter Array (ALMA) spectroscopy in the redshifted molecular oxygen (O) 56.265~GHz and 424.763~GHz transit…
Arp 65 interaction debris: massive HI displacement and star formation
Chandreyee Sengupta, Thomas. C. Scott, Sanjaya Paudel +3
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 star…
Physical environment of massive star-forming region W42
L. K. Dewangan, A. Luna, D. K. Ojha +3
We present an analysis of multi-wavelength observations from various datasets and Galactic plane surveys to study the star formation process in the W42 complex. A bipolar appearanc…
First measurement of HI 21cm emission from a GRB host galaxy indicates a post-merger system
Maryam Arabsalmani, Sambit Roychowdhury, Martin Zwaan +2
We report the detection and mapping of atomic hydrogen in HI 21cm emission from ESO 184-G82, the host galaxy of the gamma ray burst 980425. This is the first instance where HI in e…
Exploring the Role of Globular Cluster Specific Frequency on the Nova Rates in Three Virgo Elliptical Galaxies
C. Curtin, A. W. Shafter, C. J. Pritchet +3
It has been proposed that a galaxy's nova rate might be enhanced by the production of nova progenitor binaries in the dense cores of its globular clusters (GCs). To explore this id…
The disk-outflow system in the S255IR area of high mass star formation
I. Zinchenko, S. -Y. Liu, Y. -N. Su +7
We report the results of our observations of the S255IR area with the SMA at 1.3 mm in the very extended configuration and at 0.8 mm in the compact configuration as well as with th…
Broadband Spectral Modeling of the Extreme Gigahertz-Peaked Spectrum Radio Source PKS B0008-421
J. R. Callingham, B. M. Gaensler, R. D. Ekers +40
We present broadband observations and spectral modeling of PKS B0008-421, and identify it as an extreme gigahertz-peaked spectrum (GPS) source. PKS B0008-421 is characterized by th…
Brightest Cluster Galaxies in the Extended GMRT radio halo cluster sample. Radio properties and cluster dynamics
Ruta Kale, Tiziana Venturi, Rossella Cassano +4
Brightest Cluster Galaxies (BCGs) show exceptional properties over the whole electromagnetic spectrum. Their special location at the centres of galaxy clusters raises the question…
Study of underlying particle spectrum during huge X-ray flare of Mkn 421 in April 2013
Atreyee Sinha, Amit Shukla, Ranjeev Misra +3
Context: In April 2013, the nearby (z=0.031) TeV blazar, Mkn 421, showed one of the largest flares in X-rays since the past decade. Aim: To study all multiwavelength data available…
The fine structure line deficit in S 140
Volker Ossenkopf, Evgenia Koumpia, Yoko Okada +5
We try to understand the gas heating and cooling in the S 140 star forming region by spatially and spectrally resolving the distribution of the main cooling lines with GREAT/SOFIA.…
High Spectral and Spatial Resolution Observations of the PDR Emission in the NGC2023 Reflection Nebula with SOFIA and APEX
G. Sandell, B. Mookerjea, R. Guesten +3
We have mapped the NGC 2023 reflection nebula in [CII] and CO(11--10) with the heterodyne receiver GREAT on SOFIA and obtained slightly smaller maps in 13CO(3--2), CO(3--2), CO(4--…
Star formation in the filament of S254-S258 OB complex: a cluster in the process of making
M. R. Samal, D. K. Ojha, J. Jose +9
Infrared Dark Clouds are ideal laboratories to study the initial processes of high-mass star and star cluster formation. We investigated star formation activity of an unexplored fi…
A search for H emission in high-metallicity damped Lyman- systems at
Wei-Hao Wang, Nissim Kanekar, J. Xavier Prochaska
We report on a sensitive search for redshifted H line-emission from three high-metallicity damped Ly absorbers (DLAs) at with the Near-infrared Integral Field…