Original Higgs inflation and phantom crossing

Autor: Shahrokh Assyyaee, Nematollah Riazi

Publikováno v: European Physical Journal C: Particles and Fields, Vol 79, Iss 2, Pp 1-14 (2019)

Abstract It is a standard practice to ignore the initial kinetic term in an inflationary analysis. Here, we overrule this practice to analyze pre-inflationary, inflationary and post-inflationary dynamics of the original Higgs-inflation model from a w

Externí odkaz: https://doaj.org/article/2b3507adfef245d093e77480906dbe56

HD 207897 b:A dense sub-Neptune transiting a nearby and bright K-type star

Autor: Andrew W. Mayo, Jorge Lillo-Box, George R. Ricker, C. Moutou, Stephen R. Kane, René Tronsgaard, Ashley Chontos, Allyson Bieryla, Karen A. Collins, Nicola Astudillo-Defru, Luc Arnold, Rafael Luque, Andrew W. Howard, Xavier Dumusque, S. G. Sousa, V. Bourrier, Erik Petigura, Joshua N. Winn, Magali Deleuil, Lauren M. Weiss, Enric Palle, Nuno C. Santos, Steven Giacalone, J. Rey, Damien Ségransan, Courtney D. Dressing, Paul A. Dalba, Arpita Roy, Jack Lubin, Sara Seager, Corey Beard, Natalie M. Batalha, Daniel Huber, C. E. Brasseur, T. Lopez, Howard Isaacson, Teo Mocnik, Jason D. Eastman, Peter Tenenbaum, N. Heidari, Michelle L. Hill, P. Cortés-Zuleta, O. Mousis, E. Delgado Mena, Diana Dragomir, D. W. Latham, François Bouchy, Aida Behmard, David Ehrenreich, P. A. Strøm, Fei Dai, F. Vakili, T. Forveille, Tansu Daylan, R. Vanderspek, Keivan G. Stassun, Alexandre Santerne, Melissa J. Hobson, X. Bonfils, Benjamin J. Fulton, G. Montagnier, M. Stalport, Francesco Pepe, Lars A. Buchhave, Flavien Kiefer, Nicholas Scarsdale, Lee J. Rosenthal, Vardan Adibekyan, Paul Robertson, Olivier Demangeon, J. M. Jenkins, A. Carmona, Nematollah Riazi, Stéphane Udry, Rodrigo F. Díaz, N. C. Hara, G. Gaisne, Thomas Barclay, Tara Fetherolf, X. Delfosse, L. Mignon, Sergio Hoyer, B. Courcol, J. Orell-Mique, S. Borgniet, Guillaume Hébrard, Ryan A. Rubenzahl, Lea A. Hirsch, S. Dalal, Ian J. M. Crossfield, Joseph M. Akana Murphy, L. Acuna, Isabelle Boisse

Publikováno v: Heidari, N, Boisse, I, Orell-Miquel, J, Hébrard, G, Acuña, L, Hara, N C, Lillo-Box, J, Eastman, J D, Arnold, L, Astudillo-Defru, N, Adibekyan, V, Bieryla, A, Bonfils, X, Bouchy, F, Barclay, T, Brasseur, C E, Borgniet, S, Bourrier, V, Buchhave, L, Behmard, A, Beard, C, Batalha, N M, Courcol, B, Cortés-Zuleta, P, Collins, K, Carmona, A, Crossfield, I J M, Chontos, A, Delfosse, X, Dalal, S, Deleuil, M, Demangeon, O D S, Diáz, R F, Dumusque, X, Daylan, T, Dragomir, D, Delgado Mena, E, Dressing, C, Dai, F, Dalba, P A, Ehrenreich, D, Forveille, T, Fulton, B, Fetherolf, T, Gaisné, G, Giacalone, S, Riazi, N, Hoyer, S, Hobson, M J, Howard, A W, Huber, D, Hill, M L, Hirsch, L A, Isaacson, H, Jenkins, J, Kane, S R, Kiefer, F, Luque, R, Latham, D W, Lubin, J, Lopez, T, Mousis, O, Moutou, C, Montagnier, G, Mignon, L, Mayo, A, Močnik, T, Murphy, J M A, Palle, E, Pepe, F, Petigura, E A, Rey, J, Ricker, G, Robertson, P, Roy, A, Rubenzahl, R A, Rosenthal, L J, Santerne, A, Santos, N C, Sousa, S G, Stassun, K G, Stalport, M, Scarsdale, N, Strøm, P A, Seager, S, Segransan, D, Tenenbaum, P, Tronsgaard, R, Udry, S, Vanderspek, R, Vakili, F, Winn, J & Weiss, L M 2022, ' HD 207897 b : A dense sub-Neptune transiting a nearby and bright K-type star ', Astronomy and Astrophysics, vol. 658, A176 . https://doi.org/10.1051/0004-6361/202141429
aap
aap, 2022, 658, pp.A176. ⟨10.1051/0004-6361/20214142910.48550/arXiv.2110.08597⟩
A&A
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2022, 658, pp.A176. ⟨10.1051/0004-6361/202141429⟩

We present the discovery and characterization of a transiting sub-Neptune orbiting with a 16.20 day period around a nearby (28 pc) and bright(V=8.37) K0V star HD207897 (TOI-1611). This discovery is based on photometric measurements from the Transitin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c45535bfbc2b44d80aa4ccfcf7e815bb
https://orbit.dtu.dk/en/publications/3d99a271-47b7-4a78-9949-fa7678314633

Analytically Approximation Solution to Higher Derivative Gravity

Autor: Saeed Fakhry, Robert B. Mann, S. N. Sajadi, Nematollah Riazi

We obtain analytical approximate black hole solutions for higher derivative gravity in the presence of Maxwell electromagnetic source. We construct near horizon and asymptotic solutions and then use these to obtain an approximate analytic solution us

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e02c961bbceab81951115f3f657420ab
http://arxiv.org/abs/2010.15039

Dynamical and Thermal Stabilities of Nonlinearly Charged AdS Black Holes

Autor: Nematollah Riazi, S. N. Sajadi, Seyed Hossein Hendi

Publikováno v: European Physical Journal C: Particles and Fields, Vol 79, Iss 9, Pp 1-14 (2019)
European Physical Journal

In this paper, we study an extended phase space thermodynamics of a nonlinearly charged AdS black hole. We examine both the local and global stabilities, and possible phase transition of the black hole solutions. Finally, we compute quasi-normal mode

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f98fc3a81394381d231c70655557b934

A new nonlinear electrodynamics and electrically charged regular black holes

Autor: Mohammad Bagher Jahani Poshteh, Nematollah Riazi

A regular static, spherically symmetric electrically charged black hole solution of general relativity coupled to a new theory for nonlinear electrodynamics is presented. This theory has the interesting feature that, at far distances from the black h

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bcb604d28d5098d5d63bdba60b777e6c