Zobrazeno 1 - 10
of 336
pro vyhledávání: '"Raychaudhury, Somak"'
(abridged) We present the newly acquired data for an AstroSat/UVIT field centered on a face-on spiral starburst galaxy UGC 10420, located in the cluster Abell 2199. We have analysed the FUV data for this field along with the archival data from the Ga
Externí odkaz:
http://arxiv.org/abs/2312.15694
Autor:
Sankhyayan, Shishir, Bagchi, Joydeep, Tempel, Elmo, More, Surhud, Einasto, Maret, Dabhade, Pratik, Raychaudhury, Somak, Athreya, Ramana, Heinämäki, Pekka
Superclusters are the largest massive structures in the cosmic web on tens to hundreds of megaparsecs (Mpc) scales. They are the largest assembly of galaxy clusters in the Universe. Apart from a few detailed studies of such structures, their evolutio
Externí odkaz:
http://arxiv.org/abs/2309.06251
We search for signatures of recent galaxy close interactions and mergers in a sample of 202 early-type galaxies in the local universe from the public SDSS Stripe82 deep images ($\mu_r \sim 28.5$ mag arcsec$^{-2}$). Using two different methods to remo
Externí odkaz:
http://arxiv.org/abs/2302.04471
We present multi-wavelength data and analysis, including new FUV AstroSat/UVIT observations of the spiral galaxy UGC 10420 (z=0.032), a member of the cluster Abell 2199. UGC 10420 is present on the edge of the X-ray emitting region of the cluster at
Externí odkaz:
http://arxiv.org/abs/2302.01848
Autor:
Paul, Surajit, Kale, Ruta, Datta, Abhirup, Basu, Aritra, Sur, Sharanya, Parekh, Viral, Gupta, Prateek, Chatterjee, Swarna, Salunkhe, Sameer, Iqbal, Asif, Pandey-Pommier, Mamta, Raja, Ramij, Rahaman, Majidul, Raychaudhury, Somak, Nath, Biman B., Majumdar, Subhabrata
Publikováno v:
Vol. 44, page 38, year 2023, Journal of Astrophysics and Astronomy
Diffuse radio emission has been detected in a considerable number of galaxy clusters and groups, revealing the presence of pervasive cosmic magnetic fields, and of relativistic particles in the large-scale structure (LSS) of the Universe. Since clust
Externí odkaz:
http://arxiv.org/abs/2211.01393
Autor:
Dabhade, Pratik, Shimwell, Timothy W., Bagchi, Joydeep, Saikia, D. J., Combes, Francoise, Gaikwad, Madhuri, Rottgering, Huub, Mohapatra, Abhisek, Ishwara-Chandra, C. H., Intema, Huib T, Raychaudhury, Somak
Publikováno v:
A&A 668, A64 (2022)
We present for the first time a study of peculiar giant radio galaxy (GRG) J223301+131502 using deep multi-frequency radio observations from GMRT (323, 612, and 1300 MHz) and LOFAR (144 MHz) along with optical spectroscopic observations with the WHT~
Externí odkaz:
http://arxiv.org/abs/2209.13059
Autor:
Seth, Ruchika, O'Sullivan, Ewan, Sebastian, Biny, Raychaudhury, Somak, Schellenberger, Gerrit, Haines, Christopher P.
We present a combined radio/X-ray study of six massive galaxy clusters, aimed at determining the potential for heating of the intra-cluster medium (ICM) by non-central radio galaxies. Since X-ray cavities associated with the radio lobes of non-centra
Externí odkaz:
http://arxiv.org/abs/2204.06102
Autor:
Kolokythas, Konstantinos, Vaddi, Sravani, O'Sullivan, Ewan, Loubser, Ilani, Babul, Arif, Raychaudhury, Somak, Lagos, Patricio, Jarrett, Thomas H.
Using multi-band data we examine the star formation activity of the nearby group-dominant early-type galaxies of the Complete Local-volume Groups Sample (CLoGS), and the relation between star formation, gas content, and local environment. Only a smal
Externí odkaz:
http://arxiv.org/abs/2112.08498
Autor:
Mahato, Mousumi, Dabhade, Pratik, Saikia, D. J., Combes, Francoise, Bagchi, Joydeep, Ho, Luis C., Raychaudhury, Somak
Publikováno v:
A&A 660, A59 (2022)
Giant radio quasars (GRQs) are radio-loud active galactic nuclei (AGNs), propelling megaparsec-scale jets. In order to understand GRQs and their properties, we have compiled all known GRQs ("the GRQ catalogue"), and a subset of small (size <700 kpc)
Externí odkaz:
http://arxiv.org/abs/2111.11905
Autor:
Schellenberger, Gerrit, Giacintucci, Simona, Lovisari, Lorenzo, O'Sullivan, Ewan, Vrtilek, Jan, David, Laurence P., Melin, Jean-Baptiste, Lal, Dharam Vir, Ettori, Stefano, Kolokythas, Konstantinos, Sereno, Mauro, Raychaudhury, Somak
Mergers between galaxy clusters often drive shocks into the intra cluster medium (ICM), the effects of which are sometimes visible via temperature and density jumps in the X-ray, and via radio emission from relativistic particles energized by the sho
Externí odkaz:
http://arxiv.org/abs/2111.09225