Comparing recent PTA results on the nanohertz stochastic gravitational wave background

Autor: The International Pulsar Timing Array Collaboration, Agazie, G., Antoniadis, J., Anumarlapudi, A., Archibald, A. M., Arumugam, P., Arumugam, S., Arzoumanian, Z., Askew, J., Babak, S., Bagchi, M., Bailes, M., Nielsen, A. -S. Bak, Baker, P. T., Bassa, C. G., Bathula, A., Bécsy, B., Berthereau, A., Bhat, N. D. R., Blecha, L., Bonetti, M., Bortolas, E., Brazier, A., Brook, P. R., Burgay, M., Burke-Spolaor, S., Burnette, R., Caballero, R. N., Cameron, A., Case, R., Chalumeau, A., Champion, D. J., Chanlaridis, S., Charisi, M., Chatterjee, S., Chatziioannou, K., Cheeseboro, B. D., Chen, S., Chen, Z. -C., Cognard, I., Cohen, T., Coles, W. A., Cordes, J. M., Cornish, N. J., Crawford, F., Cromartie, H. T., Crowter, K., Curyło, M., Cutler, C. J., Dai, S., Dandapat, S., Deb, D., DeCesar, M. E., DeGan, D., Demorest, P. B., Deng, H., Desai, S., Desvignes, G., Dey, L., Dhanda-Batra, N., Di Marco, V., Dolch, T., Drachler, B., Dwivedi, C., Ellis, J. A., Falxa, M., Feng, Y., Ferdman, R. D., Ferrara, E. C., Fiore, W., Fonseca, E., Franchini, A., Freedman, G. E., Gair, J. R., Garver-Daniels, N., Gentile, P. A., Gersbach, K. A., Glaser, J., Good, D. C., Goncharov, B., Gopakumar, A., Graikou, E., Grießmeier, J. -M., Guillemot, L., Gültekin, K., Guo, Y. J., Gupta, Y., Grunthal, K., Hazboun, J. S., Hisano, S., Hobbs, G. B., Hourihane, S., Hu, H., Iraci, F., Islo, K., Izquierdo-Villalba, D., Jang, J., Jawor, J., Janssen, G. H., Jennings, R. J., Jessner, A., Johnson, A. D., Jones, M. L., Joshi, B. C., Kaiser, A. R., Kaplan, D. L., Kapur, A., Kareem, F., Karuppusamy, R., Keane, E. F., Keith, M. J., Kelley, L. Z., Kerr, M., Key, J. S., Kharbanda, D., Kikunaga, T., Klein, T. C., Kolhe, N., Kramer, M., Krishnakumar, M. A., Kulkarni, A., Laal, N., Lackeos, K., Lam, M. T., Lamb, W. G., Larsen, B. B., Lazio, T. J. W., Lee, K. J., Levin, Y., Lewandowska, N., Littenberg, T. B., Liu, K., Liu, T., Liu, Y., Lommen, A., Lorimer, D. R., Lower, M. E., Luo, J., Luo, R., Lynch, R. S., Lyne, A. G., Ma, C. -P., Maan, Y., Madison, D. R., Main, R. A., Manchester, R. N., Mandow, R., Mattson, M. A., McEwen, A., McKee, J. W., McLaughlin, M. A., McMann, N., Meyers, B. W., Meyers, P. M., Mickaliger, M. B., Miles, M., Mingarelli, C. M. F., Mitridate, A., Natarajan, P., Nathan, R. S., Ng, C., Nice, D. J., Niţu, I. C., Nobleson, K., Ocker, S. K., Olum, K. D., Osłowski, S., Paladi, A. K., Parthasarathy, A., Pennucci, T. T., Perera, B. B. P., Perrodin, D., Petiteau, A., Petrov, P., Pol, N. S., Porayko, N. K., Possenti, A., Prabu, T., Leclere, H. Quelquejay, Radovan, H. A., Rana, P., Ransom, S. M., Ray, P. S., Reardon, D. J., Rogers, A. F., Romano, J. D., Russell, C. J., Samajdar, A., Sanidas, S. A., Sardesai, S. C., Schmiedekamp, A., Schmiedekamp, C., Schmitz, K., Schult, L., Sesana, A., Shaifullah, G., Shannon, R. M., Shapiro-Albert, B. J., Siemens, X., Simon, J., Singha, J., Siwek, M. S., Speri, L., Spiewak, R., Srivastava, A., Stairs, I. H., Stappers, B. W., Stinebring, D. R., Stovall, K., Sun, J. P., Surnis, M., Susarla, S. C., Susobhanan, A., Swiggum, J. K., Takahashi, K., Tarafdar, P., Taylor, J., Taylor, S. R., Theureau, G., Thrane, E., Thyagarajan, N., Tiburzi, C., Toomey, L., Turner, J. E., Unal, C., Vallisneri, M., van der Wateren, E., van Haasteren, R., Vecchio, A., Krishnan, V. Venkatraman, Verbiest, J. P. W., Vigeland, S. J., Wahl, H. M., Wang, S., Wang, Q., Witt, C. A., Wang, J., Wang, L., Wayt, K. E., Wu, Z., Young, O., Zhang, L., Zhang, S., Zhu, X. -J., Zic, A.

The Australian, Chinese, European, Indian, and North American pulsar timing array (PTA) collaborations recently reported, at varying levels, evidence for the presence of a nanohertz gravitational wave background (GWB). Given that each PTA made differ

Externí odkaz: http://arxiv.org/abs/2309.00693

Magnetic Field Reversal around an Active Fast Radio Burst

Autor: Dai, S., Feng, Y., Yang, Y. P., Zhang, Y. K., Li, D., Niu, C. H., Wang, P., Xue, M. Y., Zhang, B., Burke-Spolaor, S., Law, C. J., Lynch, R. S., Connor, L., Anna-Thomas, R., Zhang, L., Duan, R., Yao, J. M., Tsai, C. W., Zhu, W. W., Cruces, M., Hobbs, G., Miao, C. C., Niu, J. R., Filipovic, M. D., Zhu, S. Q.

The environment of actively repeating fast radio bursts (FRBs) has been shown to be complex and varying. The recently localized FRB 20190520B is extremely active, has the largest confirmed host dispersion measure, and is only the second FRB source as

Externí odkaz: http://arxiv.org/abs/2203.08151

A repeating fast radio burst associated with a persistent radio source

Autor: Niu, C. -H., Aggarwal, K., Li, D., Zhang, X., Chatterjee, S., Tsai, C. -W., Yu, W., Law, C. J., Burke-Spolaor, S., Cordes, J. M., Zhang, Y. -K., Ocker, S., Yao, J. -M., Wang, P., Feng, Y., Niino, Y., Bochenek, C., Cruces, M., Connor, L., Jiang, J. -A., Dai, S., Luo, R., Li, G. -D., Miao, C. -C., Niu, J. -R., Anna-Thomas, R., Sydnor, J., Stern, D., Wang, W. -Y., Yuan, M., Yue, Y. -L., Zhou, D. -J., Yan, Z., Zhu, W. -W., Zhang, B.

The dispersive sweep of fast radio bursts (FRBs) has been used to probe the ionized baryon content of the intergalactic medium, which is assumed to dominate the total extragalactic dispersion. While the host galaxy contributions to dispersion measure

Externí odkaz: http://arxiv.org/abs/2110.07418

Pulsar Timing Array Experiments

Autor: Verbiest, J. P. W., Oslowski, S., Burke-Spolaor, S.

Pulsar timing is a technique that uses the highly stable spin periods of neutron stars to investigate a wide range of topics in physics and astrophysics. Pulsar timing arrays (PTAs) use sets of extremely well-timed pulsars as a Galaxy-scale detector

Externí odkaz: http://arxiv.org/abs/2101.10081

A repeating fast radio burst source localised to a nearby spiral galaxy

Autor: Marcote, B., Nimmo, K., Hessels, J. W. T., Tendulkar, S. P., Bassa, C. G., Paragi, Z., Keimpema, A., Bhardwaj, M., Karuppusamy, R., Kaspi, V. M., Law, C. J., Michilli, D., Aggarwal, K., Andersen, B., Archibald, A. M., Bandura, K., Bower, G. C., Boyle, P. J., Brar, C., Burke-Spolaor, S., Butler, B. J., Cassanelli, T., Chawla, P., Demorest, P., Dobbs, M., Fonseca, E., Giri, U., Good, D. C., Gourdji, K., Josephy, A., Kirichenko, A. Yu., Kirsten, F., Landecker, T. L., Lang, D., Lazio, T. J. W., Li, D. Z., Lin, H. -H., Linford, J. D., Masui, K., Mena-Parra, J., Naidu, A., Ng, C., Patel, C., Pen, U. -L., Pleunis, Z., Rafiei-Ravandi, M., Rahman, M., Renard, A., Scholz, P., Siegel, S. R., Smith, K. M., Stairs, I. H., Vanderlinde, K., Zwaniga, A. V.

Fast radio bursts (FRBs) are brief, bright, extragalactic radio flashes. Their physical origin remains unknown, but dozens of possible models have been postulated. Some FRB sources exhibit repeat bursts. Though over a hundred FRB sources have been di

Externí odkaz: http://arxiv.org/abs/2001.02222