http://hdl.handle.net/2289/142 Search the Channel search http://dspace.rri.res.in:8080/jspui/simple-search http://hdl.handle.net/2289/5595 Title: MgII statistics in GRB and QSO absorptions<br/><br/>Authors: Shechekinov, Yu A; Vasiliev, E. O.; Nath, Biman B.<br/><br/>Description: Restricted Access Book chapter from Proceedings of Indo-Russian meeting on this theme held at ARIES, Nainital, India from 2nd to 4th March, 2011, Published as ASI Conference Series Vol. 5, Ed by S.B. Pandey, V.V. Sokolov and Yu A. Schekinov http://hdl.handle.net/2289/5593 Title: Giant radio galaxies via inverse Compton weakened jets<br/><br/>Authors: Wiita, P.J.; Rosen, Alexander; Gopal-Krishna; Saripalli, Lakshmi<br/><br/>Abstract: Both analytical and numerical models for the propagation of relativistic jets through a hot interstellar medium (ISM) and into an even hotter intergalactic medium (IGM) have been considered. The models by Gopal-Krishna and Wiita (1987), and Wiita and Gopal-Krishna (1987, 1988) were extended to allow for intrinsically extremely powerful jets, which may start off advancing relativistically through the interstellar medium. Eventually the energy density in the lobes becomes comparable to that of the microwave background, and inverse Compton losses of the synchrotron emitting electrons against the background photons become important. It is argued that only powerful radio engines are responsible for giant radio galaxies (GRGs, those whose linear size exceeds 1.5 Mpc), most of the observed peculiarities of the GRGs, such as their rarity, moderate radio flux and relatively strong radio cores can be explained.<br/><br/>Description: Restricted Access. http://hdl.handle.net/2289/5592 Title: Some studies on giant radio galaxies<br/><br/>Authors: Saripalli, Lakshmi; Gopal-Krishna<br/><br/>Description: Restricted Access http://hdl.handle.net/2289/5591 Title: Science with the Murchison widefield array<br/><br/>Authors: Bowman, Judd D; Cairns, Iver; Deshpande, A.A.; Prabhu, T; Udaya Shankar, N.; Srivani, K.S.; Subrahmanyan, Ravi; +45 co authors<br/><br/>Abstract: Significant new opportunities for astrophysics and cosmology have been identified at low radio frequencies. The Murchison Widefield Array is the first telescope in the southern hemisphere designed specifically to explore the low-frequency astronomical sky between 80 and 300 MHz with arcminute angular resolution and high survey efficiency. The telescope will enable new advances along four key science themes, including searching for redshifted 21-cm emission from the EoR in the early Universe; Galactic and extragalactic all-sky southern hemisphere surveys; time-domain astrophysics; and solar, heliospheric, and ionospheric science and space weather. The Murchison Widefield Array is located in Western Australia at the site of the planned Square Kilometre Array (SKA) low-band telescope and is the only low-frequency SKA precursor facility. In this paper, we review the performance properties of the Murchison Widefield Array and describe its primary scientific objectives<br/><br/>Description: Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)