Zobrazeno 1 - 10
of 425
pro vyhledávání: '"Dwarakanath K"'
We present a method to measure the the oblateness parameter q of the dark matter halos of gas rich galaxies that have extended HI disks. We have applied our model to a sample of 20 nearby galaxies that are gas rich and close to face-on, of which 6 ar
Externí odkaz:
http://arxiv.org/abs/2308.01601
Autor:
Das, Mousumi, Ianjamasimanana, Roger, McGaugh, Stacy S., Schombert, James, Dwarakanath, K. S.
We derive the oblateness parameter q of the dark matter halo of a sample of gas rich, face-on disk galaxies. We have assumed that the halos are triaxial in shape but their axes in the disk plane (a and b) are equal, so that q=c/a measures the halo fl
Externí odkaz:
http://arxiv.org/abs/2303.05104
We present low frequency observations at $315$ and $745$ MHz from the upgraded Giant Metrewave Radio Telescope (uGMRT) of the edge-on, nearby galaxy NGC $4631$. We compare the observed surface brightness profiles along the minor axis of the galaxy wi
Externí odkaz:
http://arxiv.org/abs/2107.09081
Autor:
Franzen, T. M. O., Seymour, N., Sadler, E. M., Mauch, T., White, S. V., Jackson, C. A., Chhetri, R., Quici, B., Bell, M. E., Callingham, J. R., Dwarakanath, K. S., For, B., Gaensler, B. M., Hancock, P. J., Hindson, L., Hurley-Walker, N., Johnston-Hollitt, M., Kapinska, A. D., Lenc, E., McKinley, B., Morgan, J., Offringa, A. R., Procopio, P., Staveley-Smith, L., Wayth, R. B., Wu, C., Zheng, Q.
The GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) is a radio continuum survey at 76-227 MHz of the entire southern sky (Declination $<+30\deg$) with an angular resolution of $\approx 2$ arcmin. In this paper, we combine GLEAM d
Externí odkaz:
http://arxiv.org/abs/2107.09030
We report a $\approx 400$-hour Giant Metrewave Radio Telescope (GMRT) search for HI 21 cm emission from star-forming galaxies at $z = 1.18-1.39$ in seven fields of the DEEP2 Galaxy Survey. Including data from an earlier 60-hour GMRT observing run, we
Externí odkaz:
http://arxiv.org/abs/2105.06773
The detection of redshifted hyperfine line of neutral hydrogen (HI) is the most promising probe of the Epoch of Reionization (EoR). We report an analysis of 55 hours of Murchison Widefield Array (MWA) Phase II drift scan EoR data. The data correspond
Externí odkaz:
http://arxiv.org/abs/2104.03321
Autor:
Yadav, Jyoti, Das, Mousumi, Patra, Narendra Nath, Dwarakanath, K. S., Rahna, P. T., McGaugh, Stacy S., Schombert, James, Murthy, Jayant
We present a far-UV (FUV) study of the star-forming complexes (SFCs) in three nearby galaxies using the Ultraviolet Imaging Telescope (UVIT). The galaxies are close to face-on and show significant outer disk star formation. Two of them are isolated (
Externí odkaz:
http://arxiv.org/abs/2103.16819
We present radio observations of ultraluminous infrared galaxies (ULIRGs) using the Giant Metrewave Radio Telescope (GMRT) and combine them with archival multi-frequency observations to understand whether ULIRGs are the progenitors of the powerful ra
Externí odkaz:
http://arxiv.org/abs/2102.10600
Publikováno v:
Nature, 586, 369 (2020)
The baryonic processes in galaxy evolution include gas infall onto galaxies to form neutral atomic hydrogen (HI), the conversion of HI to the molecular state (H$_2$), and, finally, the conversion of H$_2$ to stars. Understanding galaxy evolution thus
Externí odkaz:
http://arxiv.org/abs/2010.06617
Autor:
Kelkar, Kshitija, Dwarakanath, K. S., Poggianti, Bianca M., Moretti, Alessia, Monteiro-Oliveira, Rogerio, Machado, Rubens, Lima-Neto, Gastao, Fritz, Jacopo, Vulcani, Benedetta, Gullieuszik, Marco, Bettoni, Daniela
We present a detailed analysis of star formation properties of galaxies in a nearby ($z\sim0.046$) young ($\sim$0.6 Gyr) post-merger cluster system A3376, with a moderate shock front ( $v_{s}\sim$1630 km/s) observed as symmetric radio relics. Exploit
Externí odkaz:
http://arxiv.org/abs/2002.08610