Zobrazeno 1 - 10
of 1 721
pro vyhledávání: '"SULLIVAN, ANDREW"'
Motivated by understanding the nonlinear gravitational dynamics of spacetimes admitting stably trapped null geodesics, such as ultracompact objects and black string solutions to general relativity, we explore the dynamics of nonlinear scalar waves on
Externí odkaz:
http://arxiv.org/abs/2411.17445
Autor:
Kiehlmann, Sebastian, De La Parra, Philipe Vergara, Sullivan, Andrew, Synani, A., Liodakis, Ioannis, Readhead, Anthony, Graham, Matthew, Begelman, Mitchell, Blandford, Roger, Chatziioannou, Katerina, Ding, Yuanze, Harrison, Fiona, Homan, D., Hovatta, Talvikki, Kulkarni, Shrinivas, Lister, Matthew, Maiolino, Roberto, Max-Moerbeck, Walter, Molina, B., Mroz, Przemyslaw, O'Dea, Christopher, Pavlidou, Vasiliki, Pearson, Timothy J., Aller, Margo, Lawrence, C., Lazio, T. Joseph, O'Neill, S., Prince, Thomas, Ravi, Vikram, Reeves, Rodrigo, Tassis, Konstantinos, Vallisneri, Michele, Zensus, J.
Haystack and Owens Valley Radio Observatory (OVRO) observations recently revealed strong sinusoidal total flux density variations that maintained coherence between 1975 and 2021 in the blazar PKS 2131-021 ($z=1.283)$. This was interpreted as possible
Externí odkaz:
http://arxiv.org/abs/2407.09647
Publikováno v:
Publ. Astron. Soc. Aust. 41 (2024) e064
We investigate the relationship between a galaxy cluster's hydrostatic equilibrium state, the entropy profile, $K$, of the intracluster gas, and the system's non-thermal pressure (NTP), within an analytic model of cluster structures. When NTP is negl
Externí odkaz:
http://arxiv.org/abs/2406.19029
Autor:
Sullivan, Andrew G., Romani, Roger W.
PSR J2215+5135 (J2215) is a `redback' spider pulsar, where the intrabinary shock (IBS) wraps around the pulsar rather than the stellar-mass companion. Spider orbital light curves are modulated, dominated by their binary companion thermal emission in
Externí odkaz:
http://arxiv.org/abs/2405.13889
Publikováno v:
Publ. Astron. Soc. Aust. 41 (2024) e022
We investigate the connection between a cluster's structural configuration and observable measures of its gas emission that can be obtained in X-ray and Sunyaev-Zeldovich (SZ) surveys. We present an analytic model for the intracluster gas density pro
Externí odkaz:
http://arxiv.org/abs/2403.09946
We investigate the relationship between a dark matter halo's mass profile and measures of the velocity dispersion of kinematic tracers within its gravitational potential. By predicting the scaling relation of the halo mass with the aperture velocity
Externí odkaz:
http://arxiv.org/abs/2403.07352
Autor:
Sullivan, Andrew G., Blandford, Roger D., Begelman, Mitchell C., Birkinshaw, Mark, Readhead, Anthony C. S.
Double lobe radio sources associated with active galactic nuclei represent one of the longest studied groups in radio astronomy. A particular sub-group of double radio sources comprises the compact symmetric objects (CSOs). CSOs are distinguished by
Externí odkaz:
http://arxiv.org/abs/2401.14399
Autor:
Alves, Lucas M. B., Sullivan, Andrew G., Bartos, Imre, Veske, Doğa, Will, Sebastian, Márka, Zsuzsa, Márka, Szabolcs
Gravitational-wave astronomy has developed enormously over the last decade with the first detections across different frequency bands, but has yet to access $0.1-10$ $\mathrm{Hz}$ gravitational waves. Gravitational waves in this band are emitted by s
Externí odkaz:
http://arxiv.org/abs/2401.13668