Zobrazeno 1 - 10
of 341
pro vyhledávání: '"Shaifullah"'
Autor:
Porayko, N. K., Usynina, P., Terol-Calvo, J., Camalich, J. Martin, Shaifullah, G. M., Castillo, A., Blas, D., Guillemot, L., Peel, M., Tiburzi, C., Postnov, K., Kramer, M., Antoniadis, J., Babak, S., Nielsen, A. -S. Bak, Barausse, E., Bassa, C. G., Blanchard, C., Bonetti, M., Bortolas, E., Brook, P. R., Burgay, M., Caballero, R. N., Chalumeau, A., Champion, D. J., Chanlaridis, S., Chen, S., Cognard, I., Desvignes, G., Falxa, M., Ferdman, R. D., Franchini, A., Gair, J. R., Goncharov, B., Graikou, E., Grießmeier, J. -M., Guo, Y. J., Hu, H., Iraci, F., Izquierdo-Villalba, D., Jang, J., Jawor, J., Janssen, G. H., Jessner, A., Karuppusamy, R., Keane, E. F., Keith, M. J., Krishnakumar, M. A., Lackeos, K., Lee, K. J., Liu, K., Liu, Y., Lyne, A. G., McKee, J. W., Main, R. A., Mickaliger, M. B., Niţu, I. C., Parthasarathy, A., Perera, B. B. P., Perrodin, D., Petiteau, A., Possenti, A., Leclere, H. Quelquejay, Samajdar, A., Sanidas, S. A., Sesana, A., Speri, L., Spiewak, R., Stappers, B. W., Susarla, S. C., Theureau, G., van der Wateren, E., Vecchio, A., Krishnan, V. Venkatraman, Wang, J., Wang, L., Wu, Z.
Ultra-light axion-like particles (ALPs) can be a viable solution to the dark matter problem. The scalar field associated with ALPs, coupled to the electromagnetic field, acts as an active birefringent medium, altering the polarisation properties of l
Externí odkaz:
http://arxiv.org/abs/2412.02232
Autor:
Miles, Matthew T., Shannon, Ryan M., Reardon, Daniel J., Bailes, Matthew, Champion, David J., Geyer, Marisa, Gitika, Pratyasha, Grunthal, Kathrin, Keith, Michael J., Kramer, Michael, Kulkarni, Atharva D., Nathan, Rowina S., Parthasarathy, Aditya, Singha, Jaikhomba, Theureau, Gilles, Thrane, Eric, Abbate, Federico, Buchner, Sarah, Cameron, Andrew D., Camilo, Fernando, Moreschi, Beatrice E., Shaifullah, Golam, Shamohammadi, Mohsen, Possenti, Andrea, Krishnan, Vivek Venkatraman
Pulsar Timing Arrays search for nanohertz-frequency gravitational waves by regularly observing ensembles of millisecond pulsars over many years to look for correlated timing residuals. Recently the first evidence for a stochastic gravitational wave b
Externí odkaz:
http://arxiv.org/abs/2412.01153
Autor:
Miles, Matthew T., Shannon, Ryan M., Reardon, Daniel J., Bailes, Matthew, Champion, David J., Geyer, Marisa, Gitika, Pratyasha, Grunthal, Kathrin, Keith, Michael J., Kramer, Michael, Kulkarni, Atharva D., Nathan, Rowina S., Parthasarathy, Aditya, Porayko, Nataliya K., Singha, Jaikhomba, Theureau, Gilles, Abbate, Federico, Buchner, Sarah, Cameron, Andrew D., Camilo, Fernando, Moreschi, Beatrice E., Shaifullah, Golam, Shamohammadi, Mohsen, Krishnan, Vivek Venkatraman
Pulsar timing arrays are ensembles of regularly observed millisecond pulsars timed to high precision. Each pulsar in an array could be affected by a suite of noise processes, most of which are astrophysically motivated. Analysing them carefully can b
Externí odkaz:
http://arxiv.org/abs/2412.01148
Autor:
Iraci, F., Chalumeau, A., Tiburzi, C., Verbiest, J. P. W., Possenti, A., Shaifullah, G. M., Susarla, S. C., Krishnakumar, M. A., Lam, M. T., Cromartie, H. T., Kerr, M., Grießmeier, Jean-Mathias
Radio pulsars allow the study of the ionised interstellar medium and its dispersive effects, a major noise source in gravitational wave searches using pulsars. In this paper, we compare the functionality and reliability of three commonly used schemes
Externí odkaz:
http://arxiv.org/abs/2410.22170
Autor:
Ferranti, Irene, Falxa, Mikel, Sesana, Alberto, Chalumeau, Aurelien, Porayko, Nataliya, Shaifullah, Golam, Cognard, Ismael, Guillemot, Lucas, Kramer, Michael, Liu, Kuo, Theureau, Gilles
Pulsar Timing Array (PTA) collaborations gather high-precision timing measurements of pulsars with the aim of detecting gravitational wave (GW) signals. A major challenge lies in the identification and characterization of the different sources of noi
Externí odkaz:
http://arxiv.org/abs/2410.18179
Autor:
Susarla, S. C., Chalumeau, A., Tiburzi, C., Keane, E. F., Verbiest, J. P. W., Hazboun, J. S., Krishnakumar, M. A., Iraci, F., Shaifullah, G. M., Golden, A., Nielsen, A. S. Bak, Donner, J., Grießmeier, J. M., Keith, M. J., Osłowski, S., Porayko, N. K., Serylak, M., Anderson, J. M., Brüggen, M., Ciardi, B., Dettmar, R. J., Hoeft, M., Künsemöller, J., Schwarz, D., Vocks, C.
Publikováno v:
A&A 692, A18 (2024)
High-precision pulsar timing is highly dependent on precise and accurate modeling of any effects that impact the data. It was shown that commonly used Solar Wind models do not accurately account for variability in the amplitude of the Solar wind on b
Externí odkaz:
http://arxiv.org/abs/2409.09838
Autor:
Goncharov, Boris, Sardana, Shubhit, Sesana, A., Tomson, S. M., Antoniadis, J., Chalumeau, A., Champion, D., Chen, S., Keane, E. F., Liu, K., Shaifullah, G., Speri, L., Valtolina, S.
We find the inferred properties of the putative gravitational wave background in the second data release of the European Pulsar Timing Array (EPTA) to be in better agreement with theoretical expectations under the improved noise model. In particular,
Externí odkaz:
http://arxiv.org/abs/2409.03627
Autor:
Nitu, Iuliana, Keith, Michael, Champion, David, Cognard, Ismael, Desvignes, Gregory, Guillemot, Lucas, Guo, Yanjun, Hu, Huanchen, Jang, Jiwoong, Jawor, Jedrzej, Karuppusamy, Ramesh, Keane, Evan, Kramer, Michael, Lackeos, Kristen, Liu, Kuo, Main, Robert, Perrodin, Delphine, Porayko, Nataliya, Shaifullah, Golam, Theureau, Gilles
In this work, we investigated the presence of strictly periodic, as well as quasi-periodic signals, in the timing of the 25 millisecond pulsars from the EPTA DR2 dataset. This is especially interesting in the context of the recent hints of a gravitat
Externí odkaz:
http://arxiv.org/abs/2408.09795
Recent observations by pulsar timing arrays indicate the presence of gravitational wave signals, likely from supermassive black hole binaries. These binaries can produce two types of signals: a stochastic gravitational wave background (GWB) or determ
Externí odkaz:
http://arxiv.org/abs/2407.21105
Autor:
Truant, Riccardo J., Izquierdo-Villalba, David, Sesana, Alberto, Shaifullah, Golam Mohiuddin, Bonetti, Matteo
Pulsar Timing Array (PTA) collaborations reported evidence of a nano-Hz stochastic gravitational wave background (sGWB) compatible with an adiabatically inspiraling population of massive black hole binaries (MBHBs). Despite the large uncertainties, t
Externí odkaz:
http://arxiv.org/abs/2407.12078