Zobrazeno 1 - 10
of 782
pro vyhledávání: '"Sathyaprakash, P."'
We report on the results of X-ray observations (XMM-Newton, INTEGRAL and Swift) of two hard X-ray sources, IGR J17503-2636 and IGR J17507-2647, whose nature is not fully elucidated in the literature. Three XMM-Newton observations covered the field of
Externí odkaz:
http://arxiv.org/abs/2411.17315
We examine the role of LIGO-India in facilitating multi-messenger astronomy in the era of next generation observatories. A network with two L-shaped Cosmic Explorer (CE) detectors and one triangular Einstein Telescope (ET) would detect nearly the ent
Externí odkaz:
http://arxiv.org/abs/2411.10349
Autor:
Earnshaw, Hannah P., Patti, Gauri, Brightman, Murray, Sathyaprakash, Rajath, Walton, Dominic J., Fuerst, Felix, Roberts, Timothy P., Harrison, Fiona A.
We present preliminary results of a Chandra Large Program to monitor the ultraluminous X-ray source (ULX) populations of three nearby, ULX-rich galaxies over the course of a year, finding the ULX population to show a variety of long-term variability
Externí odkaz:
http://arxiv.org/abs/2411.07459
Next-generation gravitational-wave observatories are expected to detect over a thousand compact binary coalescence signals daily, with some lasting from minutes to hours. Consequently, multiple signals will overlap in the time-frequency plane, genera
Externí odkaz:
http://arxiv.org/abs/2410.22302
Autor:
Walton, D. J., Bachetti, M., Kosec, P., Furst, F., Pinto, C., Roberts, T. P., Soria, R., Stern, D., Alston, W. N., Brightman, M., Earnshaw, H. P., Fabian, A. C., Harrison, F. A., Middleton, M. J., Sathyaprakash, R.
We present a series of five new broadband X-ray observations of the ultraluminous X-ray source Holmberg IX X-1, performed by $XMM$-$Newton$ and $NuSTAR$ in coordination. The first three of these show high soft X-ray fluxes but a near total collapse o
Externí odkaz:
http://arxiv.org/abs/2409.12241
Autor:
Beuchert, Tobias, Middleton, Matthew J., Soria, Roberto, Miller-Jones, James C. A., Dauser, Thomas, Roberts, Timothy P., Sathyaprakash, Rajath, Markoff, Sera
In order to understand the nature of super-Eddington accretion we must explore both the emission emerging directly from the inflow and its impact on the surroundings. In this paper we test whether we can use the optical line emission of spatially res
Externí odkaz:
http://arxiv.org/abs/2408.07751
The standard cosmological model involves the assumption of isotropy and homogeneity, a principle that is generally well-motivated but is now in conflict with various anisotropies found using independent astrophysical probes. These anisotropies tend t
Externí odkaz:
http://arxiv.org/abs/2406.15550
Autor:
Mahapatra, Parthapratim, Chattopadhyay, Debatri, Gupta, Anuradha, Antonini, Fabio, Favata, Marc, Sathyaprakash, B. S., Arun, K. G.
Publikováno v:
ApJ 975 117 (2024)
We propose a Bayesian inference framework to predict the merger history of LIGO-Virgo binary black holes (BHs), whose binary components may have undergone hierarchical mergers in the past. The framework relies on numerical relativity predictions for
Externí odkaz:
http://arxiv.org/abs/2406.06390
Autor:
Ronchini, Samuele, Bala, Suman, Wood, Joshua, Delaunay, James, Dichiara, Simone, Kennea, Jamie A., Parsotan, Tyler, Raman, Gayathri, Tohuvavohu, Aaron, Adhikari, Naresh, Bhat, Narayana P., Biscoveanu, Sylvia, Bissaldi, Elisabetta, Burns, Eric, Campana, Sergio, Chandra, Koustav, Cleveland, William H., Dalessi, Sarah, De Pasquale, Massimiliano, García-Bellido, Juan, Gasbarra, Claudio, Giles, Misty M., Gupta, Ish, Hartmann, Dieter, Hristov, Boyan A., Hui, Michelle C., Kashyap, Rahul, Kocevski, Daniel, Mailyan, Bagrat, Malacaria, Christian, Nakano, Hiroyuki, Principe, Giacomo, Roberts, Oliver J., Sathyaprakash, Bangalore, Shao, Lijing, Troja, Eleonora, Veres, Péter, Wilson-Hodge, Colleen A.
GW230529 is the first compact binary coalescence detected by the LIGO-Virgo-KAGRA collaboration with at least one component mass confidently in the lower mass-gap, corresponding to the range 3-5$M_{\odot}$. If interpreted as a neutron star-black hole
Externí odkaz:
http://arxiv.org/abs/2405.10752
Autor:
Chandra, Koustav, Gupta, Ish, Gamba, Rossella, Kashyap, Rahul, Chattopadhyay, Debatri, Gonzalez, Alejandra, Bernuzzi, Sebastiano, Sathyaprakash, B. S.
This study investigates the origins of GW230529, delving into its formation from massive stars within isolated binary systems. Utilizing population synthesis models, we present compelling evidence that the neutron star component forms second. However
Externí odkaz:
http://arxiv.org/abs/2405.03841