Near-extremal black holes at late times, backreacted

Autor: Shahar Hadar

Publikováno v: Journal of High Energy Physics, Vol 2019, Iss 1, Pp 1-26 (2019)

Abstract Black holes display universal behavior near extremality. One such feature is the late-time blowup of derivatives of linearized perturbations across the horizon. For generic initial data, this instability is regulated by backreaction, and the

Externí odkaz: https://doaj.org/article/092c5995e50640b398f231500c820630

The Event Horizon Explorer mission concept

Autor: Peter L. Kurczynski, Michael D. Johnson, Sheperd S. Doeleman, Kari Haworth, Eliad Peretz, Tirupati Kumara Sridharan, Byran Bilyeu, Lindy Blackburn, Don Boroson, Alexandra Brosius, Richard Butler, Dave Caplan, Koushik Chatterjee, Peter Cheimets, Daniel D'Orazio, Thomas M. Essinger-Hileman, Peter Galison, Ronald Gamble, Shahar Hadar, Tiffany Hoerbelt, Hua Jiao, Jens Kauffmann, Robert Lafon, Chung-Pei Ma, Gary Melnick, Nathan R. Newbury, Scott Noble, Daniel Palumbo, Lenny Paritsky, Dominic Pesce, Leonid Petrov, Jeff Piepmeier, Christopher J. Roberts, Bryon Robinson, Curt Shieler, Jeffrey Small, Neal Spellmeyer, Paul Tiede, Jaye Verniero, Jade Wang, Maciek Wielgus, Ed Wollack, George N. Wong, Guangning Yang

Publikováno v: Kurczynski, P L, Johnson, M D, Doeleman, S S, Haworth, K, Peretz, E, Sridharan, T K, Bilyeu, B, Blackburn, L, Boroson, D, Brosius, A, Butler, R, Caplan, D, Chatterjee, K, Cheimets, P, D'Orazio, D, Essinger-Hileman, T M, Galison, P, Gamble, R, Hadar, S, Hoerbelt, T, Jiao, H, Kauffmann, J, Lafon, R, Ma, C-P, Melnick, G, Newbury, N R, Noble, S, Palumbo, D, Paritsky, L, Pesce, D, Petrov, L, Piepmeier, J, Roberts, C J, Robinson, B, Shieler, C, Small, J, Spellmeyer, N, Tiede, P, Verniero, J, Wang, J, Wielgus, M, Wollack, E, Wong, G N & Yang, G 2022, ' The Event Horizon Explorer mission concept ', Proceedings of SPIE, vol. 12180, 12100M . https://doi.org/10.1117/12.2630313

The Event Horizon Explorer (EHE) is a mission concept to extend the Event Horizon Telescope via an additional space-based node. We provide highlights and overview of a concept study to explore the feasibility of such a mission. We present science goa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34b41c53549e45a588fa2eab801677d3
https://doi.org/10.1117/12.2630313

Extreme black hole anabasis

Autor: Achilleas P. Porfyriadis, Shahar Hadar, Alexandru Lupsasca

Publikováno v: Journal of High Energy Physics
Journal of High Energy Physics, Vol 2021, Iss 3, Pp 1-18 (2021)

We study the $\mathsf{SL}(2)$ transformation properties of spherically symmetric perturbations of the Bertotti-Robinson universe and identify an invariant $\mu$ that characterizes the backreaction of these linear solutions. The only backreaction allo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73942d381742325452ab6a8ddeb19308
https://doi.org/10.1007/jhep03(2021)223

Photon Ring Autocorrelations

Autor: Alexandru Lupsasca, Shahar Hadar, Michael D. Johnson, George N. Wong

In the presence of a black hole, light sources connect to observers along multiple paths. As a result, observed brightness fluctuations must be correlated across different times and positions in black hole images. Photons that execute multiple orbits

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72edcae8a70deaf2ade3465bd82d5ed8
http://arxiv.org/abs/2010.03683

Is there a breakdown of effective field theory at the horizon of an extremal black hole?

Autor: Harvey S. Reall, Shahar Hadar

Publikováno v: Journal of High Energy Physics, Vol 2017, Iss 12, Pp 1-30 (2017)
Journal of High Energy Physics

© 2017, The Author(s). Linear perturbations of extremal black holes exhibit the Aretakis instability, in which higher derivatives of a scalar field grow polynomially with time along the event horizon. This suggests that higher derivative corrections

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::19960a08ba5ed24bac165e892b2d5d05
http://link.springer.com/article/10.1007/JHEP12(2017)062