Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Malu, Siddharth"'
Autor:
Malu, Siddharth Savyasachi
We discuss new techniques and ideas in mm-wave instrumentation that can be used in CMB (Cosmic Microwave background) polarization experiments. Novel techniques in antenna receiver, beam combining and detector systems have resulted in greatly improved
Externí odkaz:
http://arxiv.org/abs/2403.03300
Understanding the explosion mechanism of type Ia supernova is among the most challenging issues in astrophysics. Accretion of matter on a carbon-oxygen white dwarf from a companion star is one of the most important keys in this regard. Our aim is to
Externí odkaz:
http://arxiv.org/abs/2205.04192
In binary systems, the helium accretion onto carbon-oxygen (CO) white dwarfs (WDs) plays a vital role in many astrophysical scenarios, especially in supernovae type Ia. Moreover, ignition density for accretion rate $\dot{M} \lesssim 10^{-9} M_{\odot}
Externí odkaz:
http://arxiv.org/abs/2111.13141
Publikováno v:
Astrophysics and Space Science (2018)
We present 5.5 and 9.0 GHz Australia Telescope Compact Array (ATCA) observations of the cluster MACSJ0417.5-1154, one of the most massive galaxy clusters and one of the brightest in X-ray in the Massive Cluster Survey (MACS). We estimate diffuse emis
Externí odkaz:
http://arxiv.org/abs/1805.08447
Autor:
Paul, Surajit, Datta, Abhirup, Malu, Siddharth, Gupta, Prateek, John, Reju Sam, Colafrancesco, Sergio
We present the discovery of ringlike diffuse radio emission structures in the peripheral regions of the Bullet cluster 1E 0657$-$55.8. Ring formations are spanning between 1--3 Mpc away from the center of the cluster, significantly further away from
Externí odkaz:
http://arxiv.org/abs/1804.02588
Autor:
Malu, Siddharth, Datta, Abhirup, Colafrancesco, Sergio, Marchegiani, Paolo, Subrahmanyan, Ravi, Narasimha, D, Wieringa, Mark H.
Electrons at relativistic speeds, diffusing in magnetic fields, cause copious emission at radio frequencies in both clusters of galaxies and radio galaxies, through the non-thermal radiation emission called synchrotron. However, the total power radia
Externí odkaz:
http://arxiv.org/abs/1705.08405
Autor:
Kale, Ruta, Dwarakanath, K. S., Lal, Dharam Vir, Bagchi, Joydeep, Paul, Surajit, Malu, Siddharth, Datta, Abhirup, Parekh, Viral, Sharma, Prateek, Pandey-Pommier, Mamta
The intra-cluster and inter-galactic media (ICM, IGM) that pervade the large scale structure of the Universe are known to be magnetised at sub-micro Gauss to micro Gauss levels and to contain cosmic rays (CRs). The acceleration of CRs and their evolu
Externí odkaz:
http://arxiv.org/abs/1610.08182
Publikováno v:
Astrophysics and Space Science, 361 (8), 1-8 (2016)
We present here results from observations at 5.5 and 9 GHz of the Bullet cluster 1E 0657-55.8 with the Australia Telescope Compact Array (ATCA). Our results show detection of diffuse emission in the cluster. Our findings are consistent with the previ
Externí odkaz:
http://arxiv.org/abs/1606.08700
Autor:
Malu, Siddharth S.
Thesis (Ph.D.)-- University of Wisconsin--Madison, 2007.
eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
We present a Bayesian angular power spectrum and signal map inference engine which can be adapted to interferometric observations of anisotropies inthe cosmic microwave background, 21 cm emission line mapping of galactic brightness fluctuations, or 2
Externí odkaz:
http://arxiv.org/abs/1109.4640