Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Dharam V Lal"'
Autor:
Siddhant Pinjarkar, Martin J Hardcastle, Jeremy J Harwood, Dharam V Lal, Peter W Hatfield, Matt J Jarvis, Zara Randriamanakoto, Imogen H Whittam
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 523:620-639
Jets of energetic particles, as seen in FR type-I and FR type-II sources, ejected from the center of Radio-Loud AGN affect the sources surrounding intracluster medium/intergalactic medium. Placing constraints on the age of such sources is important i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::165af52105a435ce865d7392568a3c91
https://doi.org/10.1093/mnras/stad1432
https://doi.org/10.1093/mnras/stad1432
Autor:
Dharam V. Lal, Portia Legodi, Bernie Fanaroff, Tiziana Venturi, Oleg M. Smirnov, Marco Bondi, Kshitij Thorat, Landman H. Bester, Gyula I. G. Józsa, Dane Kleiner, Francesca Loi, Sphesihle Makhathini, Sarah V. White
Publikováno v:
Galaxies, Vol 9, Iss 4, p 87 (2021)
We present a progress report of a study of FR I and FR II radio galaxies. Several new morphological features in the radio emission are now revealed using the high (μJy) sensitivity reached in the range 550–1712 MHz, more than a factor of three, at
Externí odkaz:
https://doaj.org/article/2b8fb71882c546ed85bcfc3bdb60cb81
Autor:
Chao Geng, Chong Ge, Dharam V Lal, Ming Sun, Li Ji, Haiguang Xu, Wenhao Liu, Martin Hardcastle, William Forman, Ralph Kraft, Christine Jones
Abell 407 (A407) is a unique galaxy cluster hosting a central compact group of nine galaxies (named as 'Zwicky's Nonet'; G1 - G9 in this work) within a 30 kpc radius region. The cluster core also hosts a luminous radio active galactic nucleus (AGN),
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1236880d329233396b4e3e345843cac3
http://arxiv.org/abs/2202.03742
http://arxiv.org/abs/2202.03742
Autor:
Portia Legodi, D. Kleiner, B. L. Fanaroff, Tiziana Venturi, Dharam V. Lal, Gyula I. G. Józsa, M. Bondi, Oleg Smirnov, L. Bester, F. Loi, Sarah V. White, S. Makhathini, Kshitij Thorat
Publikováno v:
Galaxies, Vol 9, Iss 87, p 87 (2021)
Galaxies
Volume 9
Issue 4
Galaxies
Volume 9
Issue 4
We present a progress report of a study of FR I and FR II radio galaxies. Several new morphological features in the radio emission are now revealed using the high (μJy) sensitivity reached in the range 550–1712 MHz, more than a factor of three, at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7561cab63ba8d8b9e711cdc418d9654e
https://www.mdpi.com/2075-4434/9/4/87
https://www.mdpi.com/2075-4434/9/4/87
Autor:
Dharam V. Lal
The upgraded Giant Metrewave Radio Telescope (GMRT) has been used to map the cluster A2065 at z = 0.0726. We report the discovery of a remnant radio galaxy at the peripheral cluster region. The spatially resolved radio emission from the remnant radio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::742ee8a644f57ac2c7dfbbd4768f2b6b
http://arxiv.org/abs/2107.01795
http://arxiv.org/abs/2107.01795
Autor:
B. L. Fanaroff, M. Bondi, Gyula I. G. Józsa, L. Bester, Kshitij Thorat, Dharam V. Lal, Sarah V. White, Tiziana Venturi, S. Makhathini, F. Loi, Oleg Smirnov, D. Kleiner
We have undertaken a systematic study of FRI and FRII radio galaxies with the upgraded Giant Metrewave Radio Telescope (uGMRT) and MeerKAT. The main goal is to explore whether the unprecedented few $\mu$Jy sensitivity reached in the range 550-1712 MH
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31b26360b2c2367aa4786f019a33b9af
http://arxiv.org/abs/2105.11695
http://arxiv.org/abs/2105.11695
Autor:
Tracy Clarke, Adi Zitrin, Christine Jones, Marcus Brüggen, Tony Mroczkowski, E. M. Churazov, Lorenzo Lovisari, C. Xie, Esra Bulbul, William R. Forman, Felipe Andrade-Santos, R. J. van Weeren, Ralph P. Kraft, Dharam V. Lal, Huib Intema, A. Botteon
Publikováno v:
Astronomy & Astrophysics, 636, A3
Massive merging galaxy clusters often host diffuse Mpc-scale radio synchrotron emission. This emission originates from relativistic electrons in the ionized intracluster medium (ICM). An important question is how these synchrotron emitting relativist
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79ffc6f70eea4b3ecb0c83c84218f175
Autor:
Stephen S. Murray, Kevin Fogarty, Andra Stroe, Reinout J. van Weeren, Felipe Andrade-Santos, Marcus Brüggen, Hyesung Kang, Christine Jones, Dongsu Ryu, William A. Dawson, William R. Forman, David Sobral, Vinicius M. Placco, Nathan Golovich, Rafael M. Santucci, Dharam V. Lal, Gabriella Di Gennaro, Ralph P. Kraft, David Wittman, M. James Jee
Publikováno v:
Astrophysical Journal, vol 887, iss 1
The Astrophysical Journal, vol 887, iss 1
The Astrophysical Journal, 887(1), 31
The Astrophysical Journal, vol 887, iss 1
The Astrophysical Journal, 887(1), 31
We present deep Chandra observations of A3411-12, a remarkable merging cluster that hosts the most compelling evidence for electron re-acceleration at cluster shocks to date. Using the $Y_X-M$ scaling relation, we find $r_{500} \sim 1.3$ Mpc, $M_{500
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3eefde6a853bb3e554a84764ff4e61eb
https://doi.org/10.3847/1538-4357/ab4ce5
https://doi.org/10.3847/1538-4357/ab4ce5
Autor:
Dharam V. Lal
Publikováno v:
2019 URSI Asia-Pacific Radio Science Conference (AP-RASC).
We would present our efforts to map extended diffuse radio emission using the Giant Metrewave Radio Telescope in order to achieve high sensitivity, high resolution, high dynamic range mapping of extended sources at low radio frequencies. The performa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c85c156ddafac6141f40f7a513200341
https://doi.org/10.23919/ursiap-rasc.2019.8738222
https://doi.org/10.23919/ursiap-rasc.2019.8738222
Autor:
C. H. Ishwara-Chandra, Dharam V. Lal
Publikováno v:
2019 URSI Asia-Pacific Radio Science Conference (AP-RASC).
We would present our efforts to map radio emission using the upgraded Giant Metrewave Radio Telescope in order to achieve high sensitivity, high resolution, high dynamic range mapping of the Coma cluster of galaxies. We will present low radio frequen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2063decb5b3db90c2676451531e6ec2f
https://doi.org/10.23919/ursiap-rasc.2019.8738415
https://doi.org/10.23919/ursiap-rasc.2019.8738415