Results 111 to 120 of about 38,497 (193)

Notional Geological Traverses, Station Activities, and Sample Collection on Mons Malapert, Lunar South Polar Region

Journal of Geophysical Research: Planets, Volume 130, Issue 7, July 2025.
Abstract The geology of a potential Artemis landing site on Mons Malapert is examined using remote sensing techniques and lessons learned from Apollo missions to the lunar surface. Orthomosaics, digital terrain models, illumination models, thermal conditions, crater size‐frequency distribution analyses, geomorphological mapping, spectral and ...
David A. Kring, Amy L. Fagan, Valentin T. Bickel, Ariel N. Deutsch, Lisa R. Gaddis, Juliane Gross, Harald Hiesinger, Therese M. Huning, José M. Hurtado Jr., Wajiha Iqbal, Katherine H. Joy, Laszlo Keszthelyi, Myriam Lemelin, Chris A. Looper, José M. Martínez‐Camacho, Gordon R. Osinski, Eloy Peña‐Asensio, Nico Schmedemann, Matthew A. Siegler, Sonia M. Tikoo, Carolyn H. van der Bogert, Kris Zacny   +21 more
wiley   +1 more source

Probability for Primordial Black Holes in Multidimensional Universe with Nonlinear Scalar Curvature Terms

, 2008
We investigate multi-dimensional universe with nonlinear scalar curvature terms to evaluate the probability of creation of primordial black holes. For this we obtain Euclidean instanton solution in two different topologies: (a) $S^{D-1}$ - topology which
A. Saha, B. C. Paul, H. Nariai, S. Ghose, T. Kaluza, V. B. Petkov   +5 more
core   +1 more source

Evolution of primordial black holes in Jordan-Brans-Dicke cosmology

, 2008
We consider the evolution of primordial black holes in a generalyzed Jordan-Brans-Dicke cosmological model where both the Brans-Dicke scalar field and its coupling to gravity are dynamical functions determined from the evolution equations.
A. S. Majumdar, Appelquist T., Carr B. J., Carr B. J., Carr B. J., D. Gangopadhyay, Gasperini M., Hawking S. W., L. P. Singh, Majumdar A. S., Will C. M., Zeldovich Ya B., Zeldovich Ya B.   +12 more
core   +2 more sources

CLASSICALITY OF PRIMORDIAL FLUCTUATIONS AND PRIMORDIAL BLACK HOLES

International Journal of Modern Physics D, 2001
The production of Primordial Black Holes (PBH) from inflationary perturbations provides a physical process where the effective classicality of the fluctuations does not hold for certain scales. For adiabatic perturbations produced during inflation, this range of scales corresponds to PBH with masses M≪1015 g.
openaire   +2 more sources

Accretion, evaporation and superradiance phase diagram of (primordial) black holes and 10−21 − 1021 eV scalar, vector, tensor fields

Physics Letters B
We obtain the accretion, evaporation and superradiance phase diagram of astrophysical and primordial black holes in the mass range 10−33−1011M⊙. This black hole mass range corresponds to production of 10−21−1021 eV particles for superradiance (bosons ...
Caner Ünal
doaj   +1 more source

Primordial black holes could hold the key to dark matter mysteries. [PDF]

Proc Natl Acad Sci U S A, 2022
Waldrop MM.
europepmc   +1 more source

Thermal Gravitational Waves from Primordial Black Holes

, 2010
Thermal gravitational waves can be generated in various sources such as, in the cores of stars, white dwarfs and neutron stars due to the fermion collisions in the dense degenerate Fermi gas.
Arun, Kenath, Sivaram, C.
core   +1 more source

Primordial black holes within Higgs hybrid metric-Palatini approach

European Physical Journal C: Particles and Fields
In this paper, we investigate the production of primordial black holes (PBHs) during the radiation-dominated era. The collapse of significant density perturbations originating from large primordial scalar fluctuations generated during inflation can lead ...
Brahim Asfour, Farida Bargach, Yahya Ladghami, Ahmed Errahmani, Taoufik Ouali   +4 more
doaj   +1 more source

Primordial black holes in Gauss-Bonnet gravity

Physics Letters B
In this paper, we investigate the production of primordial black holes (PBHs) during the preheating era. Indeed, the amplification of field fluctuations can lead to the amplification of curvature perturbations.
Brahim Asfour, Aatifa Bargach, Yahya Ladghami, Ahmed Errahmani, Taoufik Ouali   +4 more
doaj   +1 more source

Search for Primordial Black Holes with SGARFACE

, 2008
The Short GAmma Ray Front Air Cherenkov Experiment (SGARFACE) uses the Whipple 10 m telescope to search for bursts of $\gamma$ rays. SGARFACE is sensitive to bursts with duration from a few ns to $\sim$20 $\mu$s and with $\gamma$-ray energy above 100 MeV.
A. Falcone, A.W. Smith, Abbott, Afshordi, Alcock, Alexandreas, Amsler, Argyres, Barrau, Bhat, Bhat, Braun-Munzinger, Brosch, Bugaev, Carr, Carr, Carr, Carr, Chisholm, Cline, Connaughton, D. Horan, F. Krennrich, Fegan, Ferrari, Fichtel, Gilbert, Hagedorn, Hagedorn, Halzen, Hawking, Hawking, Hawking, Heckler, Holder, J. Kildea, J. Toner, Kaiser, Kertzman, Khlopov, Krennrich, Landau, LeBohec, Linton, Longair, Lyutikov, M. Schroedter, MacGibbon, MacGibbon, MacGibbon, MacGibbon, MacGibbon, MacGibbon, Maki, Mohanty, Nakamura, Nouicer, Paczynski, Page, Polnarev, Porter, Porter, Porter, Porter, Rees, Rubin, S. LeBohec, S.J. Fegan, Stojkovic, T.C. Weekes, Trofimenko, Weekes, Wright, Yoshimura, Yukhimuk, Zel’Dovich   +75 more
core   +1 more source