Zobrazeno 1 - 10
of 1 371
pro vyhledávání: '"P, Chalumeau"'
Autor:
Liu, K., Parthasarathy, A., Keith, M., Tiburzi, C., Susarla, S. C., Antoniadis, J., Chalumeau, A., Chen, S., Cognard, I., Golden, A., Grießmeier, J. -M., Guillemot, L., Janssen, G. H., Keane, E. F., Kramer, M., McKee, J. W., Mickaliger, M. B., Theureau, G., Wang, J.
Astrometry of pulsars, particularly their distances, serves as a critical input for various astrophysical experiments using pulsars. Pulsar timing is a primary approach for determining a pulsar's position, parallax, and distance. In this paper, we ex
Externí odkaz:
http://arxiv.org/abs/2412.07103
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:
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
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:
Chalumeau, Adam, Galiay, Blandine
The Einstein universe $\mathbf{Ein}^{p,q}$ of signature $(p,q)$ is a pseudo-Riemannian analogue of the conformal sphere; it is the conformal compactification of the pseudo-Riemannian Minkowski space. For $p,q \geq 1$, we show that, up to a conformal
Externí odkaz:
http://arxiv.org/abs/2407.18577
Autor:
Chalumeau, Felix, Shabe, Refiloe, De Nicola, Noah, Pretorius, Arnu, Barrett, Thomas D., Grinsztajn, Nathan
Combinatorial Optimization is crucial to numerous real-world applications, yet still presents challenges due to its (NP-)hard nature. Amongst existing approaches, heuristics often offer the best trade-off between quality and scalability, making them
Externí odkaz:
http://arxiv.org/abs/2406.16424
Autor:
Larsen, Bjorn, Mingarelli, Chiara M. F., Hazboun, Jeffrey S., Chalumeau, Aurelien, Good, Deborah C., Simon, Joseph, Agazie, Gabriella, Anumarlapudi, Akash, Archibald, Anne M., Arzoumanian, Zaven, Baker, Paul T., Brook, Paul R., Cromartie, H. Thankful, Crowter, Kathryn, DeCesar, Megan E., Demorest, Paul B., Dolch, Timothy, Ferrara, Elizabeth C., Fiore, William, Fonseca, Emmanuel, Freedman, Gabriel E., Garver-Daniels, Nate, Gentile, Peter A., Glaser, Joseph, Jennings, Ross J., Jones, Megan L., Kaplan, David L., Kerr, Matthew, Lam, Michael T., Lorimer, Duncan R., Luo, Jing, Lynch, Ryan S., McEwen, Alexander, McLaughlin, Maura A., McMann, Natasha, Meyers, Bradley W., Ng, Cherry, Nice, David J., Pennucci, Timothy T., Perera, Benetge B. P., Pol, Nihan S., Radovan, Henri A., Ransom, Scott M., Ray, Paul S., Schmiedekamp, Ann, Schmiedekamp, Carl, Shapiro-Albert, Brent J., Stairs, Ingrid H., Stovall, Kevin, Susobhanan, Abhimanyu, Swiggum, Joseph K., Wahl, Haley M., Champion, David J., Cognard, Ismael, Guillemot, Lucas, Hu, Huanchen, Keith, Michael J., Liu, Kuo, McKee, James W., Parthasarathy, Aditya, Perrodin, Delphine, Possenti, Andrea, Shaifullah, Golam M., Theureau, Gilles
Pulsar timing arrays (PTAs) are designed to detect low-frequency gravitational waves (GWs). GWs induce achromatic signals in PTA data, meaning that the timing delays do not depend on radio-frequency. However, pulse arrival times are also affected by
Externí odkaz:
http://arxiv.org/abs/2405.14941