Zobrazeno 1 - 10
of 119
pro vyhledávání: '"J. A. de Freitas Pacheco"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 5, Pp 1-6 (2019)
Abstract In a recent paper we have shown that a minimally coupled, self-interacting scalar field of mass m can form black holes of mass $$M=\sqrt{3}/(4m)$$ M=3/(4m) (in Planck units). If dark matter is composed by axions, they can form miniclusters t
Externí odkaz:
https://doaj.org/article/c87ca941dc6b4330a05f228e595809e2
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 5, Pp 1-6 (2019)
Eur.Phys.J.C
Eur.Phys.J.C, 2019, 79 (5), pp.426. ⟨10.1140/epjc/s10052-019-6940-z⟩
European Physical Journal
European Physical Journal C: Particles and Fields
European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2019, 79 (5), pp.426. ⟨10.1140/epjc/s10052-019-6940-z⟩
Eur.Phys.J.C
Eur.Phys.J.C, 2019, 79 (5), pp.426. ⟨10.1140/epjc/s10052-019-6940-z⟩
European Physical Journal
European Physical Journal C: Particles and Fields
European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2019, 79 (5), pp.426. ⟨10.1140/epjc/s10052-019-6940-z⟩
In a recent paper we have shown that a minimally coupled, self-interacting scalar field of mass $m$ can form black holes of mass $M=\sqrt{3}/(4m)$ (in Planck units). If dark matter is composed by axions, they can form miniclusters that for QCD axions
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f42282f8faddea345bcd8e1cce6b7c22
http://link.springer.com/article/10.1140/epjc/s10052-019-6940-z
http://link.springer.com/article/10.1140/epjc/s10052-019-6940-z
Autor:
J. A. de Freitas Pacheco, Joseph Silk
Publikováno v:
Physical Review D
Physical Review D, American Physical Society, 2020, 101 (8), pp.083022. ⟨10.1103/PhysRevD.101.083022⟩
Physical Review D, American Physical Society, 2020, 101 (8), pp.083022. ⟨10.1103/PhysRevD.101.083022⟩
Primordial black holes formed in an early post-inflation matter-dominated epoch during preheating provide a novel pathway for a source of the dark matter that utilizes known physics in combination with plausible speculations about the role of quantum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4d277c958fb0d6be6669824c1dfae3f
https://hal.archives-ouvertes.fr/hal-02550066
https://hal.archives-ouvertes.fr/hal-02550066
Publikováno v:
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
The cooler than expected optical-UV transient PS1-10jh detected by the Pan-STARRS1 survey is probably related to a tidal disruption event in which a He-rich stellar core remnant is implied. The evolution of bound debris during the disk phase is studi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bce1eac92326f1452d9b2258a3efe034
https://doi.org/10.1093/mnrasl/sls047
https://doi.org/10.1093/mnrasl/sls047
Autor:
J. A. de Freitas Pacheco
Publikováno v:
The Cosmic Microwave Background ISBN: 9783319447681
Astrophys.Space Sci.Proc.
2nd José Plínio Baptista School of Cosmology
2nd José Plínio Baptista School of Cosmology, Mar 2014, Pedra Azul, Brazil. pp.239-266, ⟨10.1007/978-3-319-44769-8_6⟩
Astrophys.Space Sci.Proc.
2nd José Plínio Baptista School of Cosmology
2nd José Plínio Baptista School of Cosmology, Mar 2014, Pedra Azul, Brazil. pp.239-266, ⟨10.1007/978-3-319-44769-8_6⟩
International audience; In this lecture, different milestones in the cosmological history of baryons are reviewed. First, the appearance of hadrons as a consequence of the confinement of quarks is discussed. Then the era in which nuclei interact to p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d2d69dd71c0987646306a5dd1ce09de
https://doi.org/10.1007/978-3-319-44769-8_6
https://doi.org/10.1007/978-3-319-44769-8_6
Effects of velocity dispersion of dark matter particles on the CMB TT power spectrum and on the matter linear power spectrum are investigated using a modified CAMB code. Cold dark matter originated from thermal equilibrium processes does not produce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::28d37a82271c4d40ad4b7a607b0ee083
http://hdl.handle.net/11383/2125114
http://hdl.handle.net/11383/2125114
Publikováno v:
Classical and Quantum Gravity
Classical and Quantum Gravity, IOP Publishing, 2007, 24, pp.5427-5433. ⟨10.1088/0264-9381/24/22/007⟩
Classical and Quantum Gravity, IOP Publishing, 2007, 24, pp.5427-5433. ⟨10.1088/0264-9381/24/22/007⟩
The accretion of phantom fields by black holes within a thermodynamic context is addressed. For a fluid violating the dominant energy condition, the case of a phantom fluid, the Euler and Gibbs relations permit two different possibilities for the ent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::988d386812fa8de030b33076352ec43e
https://doi.org/10.1088/0264-9381/24/22/007
https://doi.org/10.1088/0264-9381/24/22/007
Two alternative theories to dark matter are investigated by testing their ability to describe consistently the dynamics of the Milky Way. The first one refers to a modified gravity theory having a running gravitational constant and the second assumes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36bcea92ee17e2583a8f09a67e371698
Publikováno v:
The Astrophysical Journal. 642:455-461
In this work, numerical simulations were used to investigate the gravitational stochastic background produced by coalescences occurring up to $z \sim 5$ of double neutron star systems. The cosmic coalescence rate was derived from Monte Carlo methods
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cfb533db68c29e1612136f59450bcbb0
https://doi.org/10.1086/500190
https://doi.org/10.1086/500190
Autor:
S. Peirani, J. A. de Freitas Pacheco
Publikováno v:
New Astronomy
New Astronomy, Elsevier, 2006, 11, pp.325-330. ⟨10.1016/j.newast.2005.08.008⟩
New Astronomy, Elsevier, 2006, 11, pp.325-330. ⟨10.1016/j.newast.2005.08.008⟩
The spherical infall model first developed by Lema\^{i}tre and Tolman was modified in order to include the effects of a dark energy term. The resulting velocity-distance relation was evaluated numerically. This equation, when fitted to actual data, p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::364e3759c61f6e398c2b60f194f8b801
https://doi.org/10.1016/j.newast.2005.08.008
https://doi.org/10.1016/j.newast.2005.08.008