Article
Astronomy & Astrophysics
Quinn Taylor, Glenn D. Starkman
Summary: Black holes are predicted to evaporate through Hawking radiation, but the decay of massive black holes outside galaxies and clusters is delayed, and black holes within galaxies/clusters do not decay until the clearance of dark matter.
Article
Astronomy & Astrophysics
Eniko Regos, Jozsef Vinko, Zsofia V. Stermeczky
Summary: This study focuses on the detection and observational characteristics of direct-collapse black holes (DCBHs) and tidal disruption events (TDEs) around them, using the James Webb Space Telescope (JWST). It highlights the potential brightness of accreting DCBH seeds for detection and the challenges in identifying TDEs from quiescent black holes compared to superluminous supernovae. The research also suggests that TDEs of massive stars around DCBHs can enhance the chances of discovery as transient objects.
ASTROPHYSICAL JOURNAL
(2021)
Review
Physics, Multidisciplinary
Bernard Carr, Kazunori Kohri, Yuuiti Sendouda, Jun'ichi Yokoyama
Summary: In this article, constraints on the fraction of the Universe that may have gone into primordial black holes (PBHs) over a range of masses are updated. The discussion covers the reasons why PBHs smaller than a certain mass threshold are constrained and the various constraints on PBHs larger than that threshold.
REPORTS ON PROGRESS IN PHYSICS
(2021)
Article
Astronomy & Astrophysics
Guillem Domenech, Chunshan Lin, Misao Sasaki
Summary: We calculate the gravitational waves induced by density fluctuations from the distribution of primordial black holes, finding that most of the waves are generated after the black holes evaporate. The strongest constraint on the produced gravitational waves comes from big bang nucleosynthesis, and some of the waves could potentially be detected by LIGO and DECIGO in the future.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Zainab Nazari, Michele Cicoli, Katy Clough, Francesco Muia
Summary: This study investigates the dynamics of pseudotopological objects called oscillons for a class of models inspired by axion-monodromy using numerical relativity simulations. It contrasts the effects of adding self-interactions with or without gravitational support, mapping out regions of parameter space where initial conditions collapse to black holes or remain pseudo-stable or disperse.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Pierre Auclair, Vincent Vennin
Summary: The study investigates the mass distribution of Primordial Black Holes (PBHs) produced during metric preheating, confirming the potential dominance of PBHs at the end of the oscillatory phase. The inclusion of the cloud-in-cloud mechanism reveals a more suppressed mass distribution at low masses and a peak several orders of magnitude above previously thought, with cosmological effects discussed.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Eloy de Jong, Josu C. Aurrekoetxea, Eugene A. Lim, Tiago Franca
Summary: This study investigates the formation of spinning primordial black holes during an early matter dominated era. By conducting non-linear 3+1D general relativistic simulations, the efficiency of mass and angular momentum transfer is calculated, resulting in approximately 10% and 5%, respectively. The research demonstrates that subsequent evolution plays a significant role in the accretion of non-rotating matter by seed PBHs, leading to a decrease in the dimensionless spin. Unless the matter era is extremely short, the final dimensionless spin is expected to be negligible.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Chiara Animali, Vincent Vennin
Summary: In this work, we study cosmological fluctuations and the formation of Primordial Black Holes (PBHs) through the process of stochastic tunneling, where the inflaton escapes a local minimum of its potential through quantum fluctuations. We analyze two different toy models and find that when the potential barrier is small enough compared to its width, the potential can be approximated as flat and PBHs are not massively produced. However, when the potential barrier height exceeds a certain critical value, the PBH abundance grows exponentially or even super-exponentially.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Kentaro Kasai, Masahiro Kawasaki, Kai Murai
Summary: This paper investigates a primordial black hole (PBH) formation scenario based on the Affleck-Dine (AD) mechanism and explores two PBH mass regions. The previous studies revealed that the inhomogeneous AD baryogenesis is constrained by the presence of baryon asymmetry outside PBHs, leading to the proposal of an alternative scenario.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Eloy de Jong, Josu C. Aurrekoetxea, Eugene A. Lim
Summary: In this study, the formation of black holes from subhorizon and superhorizon perturbations in a matter dominated universe is investigated using numerical relativity simulations. Two primary mechanisms of formation are identified, depending on the initial perturbation's mass and geometry. The findings contribute to a better understanding of the formation mechanisms of black holes.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Michael Ryan, Sarah Shandera, James Gurian, Donghui Jeong
Summary: Dark matter that is dissipative may cool to form compact objects, including black holes. A chemistry tool, DarkKROME, is introduced to accurately model the relevant processes for cooling dark matter gas with two unequal-mass fundamental fermions interacting via a massless-photon-mediated U(1) force. This tool is used for one-zone collapse simulations to study the evolution of temperature-density phase diagrams for various dark sector parameters.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Karim Carrion, Juan Carlos Hidalgo, Ariadna Montiel, Luis E. Padilla
Summary: The study focuses on perturbations of a complex scalar field during reheating, highlighting the differences in instability scale compared to a real scalar field. It also examines the probability of unstable fluctuations forming Primordial Black Holes (PBHs) and the potential existence of Planck-mass relics as a result of tiny PBHs. Restrictions are imposed on the duration and energy scale of fast oscillations period, considering the relics as, at most, the entirety of dark matter in the Universe.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Kentaro Kasai, Masahiro Kawasaki, Naoya Kitajima, Kai Murai, Shunsuke Neda, Fuminobu Takahashi
Summary: In this article, we study the clustering behavior of primordial black holes (PBHs) and axion miniclusters in a proposed model. By analyzing the resulting isocurvature perturbations, we are able to place constraints on the model parameters. The calculated PBH fractions provide insights into explaining the LIGO/Virgo events or the seeds of supermassive black holes (SMBHs).
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Kentaro Kasai, Masahiro Kawasaki, Naoya Kitajima, Kai Murai, Shunsuke Neda, Fuminobu Takahashi
Summary: This study shows that the clustering of PBHs and axion miniclusters predicted by a certain model can lead to large isocurvature perturbations, thus imposing stringent constraints on the model parameters. Different values of the axion decay constant fa correspond to different constraints on the PBH fraction in dark matter.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Physics, Multidisciplinary
Marcus A. Khuri, Jordan F. Rainone
Summary: We present the first examples of formally asymptotically flat black hole solutions with horizons of general lens space topology L(p, q). These solutions are five-dimensional static or stationary spacetimes that are regular on and outside the event horizon, and supported by Kaluza-Klein matter fields. Additionally, we obtain new examples of regular gravitational instantons in higher dimensions.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
Marta Volonteri, Pedro R. Capelo, Hagai Netzer, Jillian Bellovary, Massimo Dotti, Fabio Governato
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2015)
Article
Astronomy & Astrophysics
Pedro R. Capelo, Marta Volonteri, Massimo Dotti, Jillian M. Bellovary, Lucio Mayer, Fabio Governato
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2015)
Article
Astronomy & Astrophysics
Charlotte R. Christensen, Thomas Quinn, Gregory Stinson, Jillian Bellovary, James Wadsley
ASTROPHYSICAL JOURNAL
(2010)
Article
Astronomy & Astrophysics
Simone Callegari, Stelios Kazantzidis, Lucio Mayer, Monica Colpi, Jillian M. Bellovary, Thomas Quinn, James Wadsley
ASTROPHYSICAL JOURNAL
(2011)
Article
Astronomy & Astrophysics
Jillian Bellovary, Marta Volonteri, Fabio Governato, Sijing Shen, Thomas Quinn, James Wadsley
ASTROPHYSICAL JOURNAL
(2011)
Article
Astronomy & Astrophysics
Michael Berry, Zeljko Ivezic, Branimir Sesar, Mario Juric, Edward F. Schlafly, Jillian Bellovary, Douglas Finkbeiner, Dijana Vrbanec, Timothy C. Beers, Keira J. Brooks, Donald P. Schneider, Robert R. Gibson, Amy Kimball, Lynne Jones, Peter Yoachim, Simon Krughoff, Andrew J. Connolly, Sarah Loebman, Nicholas A. Bond, David Schlegel, Julianne Dalcanton, Brian Yanny, Steven R. Majewski, Gillian R. Knapp, James E. Gunn, J. Allyn Smith, Masataka Fukugita, Steve Kent, John Barentine, Jurek Krzesinski, Dan Long
ASTROPHYSICAL JOURNAL
(2012)
Article
Astronomy & Astrophysics
Jillian M. Bellovary, Fabio Governato, Thomas R. Quinn, James Wadsley, Sijing Shen, Marta Volonteri
ASTROPHYSICAL JOURNAL LETTERS
(2010)
Article
Astronomy & Astrophysics
Melvyn B. Davies, M. Coleman Miller, Jillian M. Bellovary
ASTROPHYSICAL JOURNAL LETTERS
(2011)
Article
Astronomy & Astrophysics
Sandor Van Wassenhove, Marta Volonteri, Lucio Mayer, Massimo Dotti, Jillian Bellovary, Simone Callegari
ASTROPHYSICAL JOURNAL LETTERS
(2012)
Article
Astronomy & Astrophysics
Jillian M. Bellovary, Kelly Holley-Bockelmann, Kayhan Gueltekin, Charlotte R. Christensen, Fabio Governato, Alyson M. Brooks, Sarah Loebman, Ferah Munshi
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2014)
Article
Astronomy & Astrophysics
Sandor Van Wassenhove, Pedro R. Capelo, Marta Volonteri, Massimo Dotti, Jillian M. Bellovary, Lucio Mayer, Fabio Governato
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2014)
Article
Astronomy & Astrophysics
Jillian M. Bellovary, Mordecai-Mark Mac Low, Barry McKernan, K. E. Saavik Ford
ASTROPHYSICAL JOURNAL LETTERS
(2016)
Article
Astronomy & Astrophysics
Marta Volonteri, Pedro R. Capelo, Hagai Netzer, Jillian Bellovary, Massimo Dotti, Fabio Governato
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2015)
Proceedings Paper
Astronomy & Astrophysics
Enrico Barausse, Jillian Bellovary, Emanuele Berti, Kelly Holley-Bockelmann, Brian Farris, Bangalore Sathyaprakash, Alberto Sesana
10TH INTERNATIONAL LISA SYMPOSIUM
(2015)