Results 41 to 50 of about 37,989 (204)

Imprint of galactic rotation curves and metric fluctuations on the recombination era anisotropy

Physics Letters B, 2023
In applications of the conformal gravity theory it has been shown that a scale of order 105 Mpc due to large scale inhomogeneities such as clusters of galaxies is imprinted on the rotation curves of galaxies.
Philip D. Mannheim
doaj   +1 more source

Random Primordial Magnetic Fields and the Gas Content of Dark Matter Halos

, 2010
We recently predicted the existence of random primordial magnetic fields (RPMF) in the form of randomly oriented cells with dipole-like structure with a cell size $L_0$ and an average magnetic field $B_0$.
de Souza, Rafael S., Opher, Reuven, Rodrigues, Luiz Felippe S.   +2 more
core   +1 more source

Strong Primordial Inhomogeneities and Galaxy Formation [PDF]

, 2004
The modern theory of the cosmological large-scale structure is based on the assumption that this structure is formed as the result of development of grav­itational instability from small initial perturbations of density or gravitational potential. As a rule, these perturbations are Gaussian, but some versions of non-Gaussian perturbations are also ...
Maxim Yu. Khlopov, Sergei G. Rubin
openaire   +1 more source

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

Violent Starbursts and Quiescence Induced by Far-ultraviolet Radiation Feedback in Metal-poor Galaxies at High Redshift

The Astrophysical Journal
JWST observations of galaxies at z ≳ 8 suggest that they are more luminous and clumpier than predicted by most models, prompting several proposals on the physics of star formation and feedback in the first galaxies. In this paper, we focus on the role of
Kazuyuki Sugimura, Massimo Ricotti, Jongwon Park, Fred Angelo Batan Garcia, Hidenobu Yajima   +4 more
doaj   +1 more source

Blue compact galaxies and the primordial 4Helium abundance

, 2000
Blue compact galaxies (BCG) are ideal objects in which to derive the primordial 4He abundance because they are chemically young and have not had a significant stellar He contribution.
Izotov, Yuri I., Thuan, Trinh Xuan
core   +1 more source

Identifying Old Tidal Dwarf Irregulars [PDF]

, 2000
We examine the observational consequences of the two possible origins for irregular galaxies: formation from collapse of a primordial cloud of gas early in the age of the Universe, and formation from tidal tails in an interaction that could have occured ...
Bottinelli L., Broeils A. H., de Blok W. J. G., Deidre A. Hunter, Duc P.-A., Edmunds M. G., Erin W. Roye, Ferraro F. R., Israel F., Lee H., McIntyre V. J., Mirabel I. F., Mirabel I. F., Sally D. Hunsberger, Skillman E. D., Tully R. B., Zwicky F.   +16 more
core   +3 more sources

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

Experimental Physiology, EarlyView.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +1 more source

Scaling Laws for Dark Matter Halos in Late-Type and Dwarf Spheroidal Galaxies [PDF]

, 2004
Maximum disk mass models fitted to galaxy rotation curves are used to show that dark matter (DM) halos in late-type and dwarf spheroidal (dSph) galaxies satisfy well defined scaling laws.
Freeman, K. C., Kormendy, John
core  

Primordial magnetic field constraints from the end of reionization

, 2011
Primordial magnetic fields generated in the early universe are subject of considerable investigation, and observational limits on their strength are required to constrain the theory.
Ando, Banerjee, Barrow, Battaner, Baym, Beck, Bernet, Bertone, Bolton, Bouwens, Caprini, Cheng, Clarke, Coles, Dominik R. G. Schleicher, Dubois, Durrer, Federrath, Francesco Miniati, Gnedin, Grasso, Grasso, Kim, Komatsu, Latif, Madau, Madau, Miniati, Miniati, Miniati, Mortlock, Murphy, Neronov, Quashnock, Ryu, Salvaterra, Schleicher, Schleicher, Schlickeiser, Seager, Sethi, Sigl, Srbinovsky, Subramanian, Subramanian, Sur, Tashiro, Tavecchio, Taylor, Turner, Yamazaki   +50 more
core   +1 more source