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Large-scale matter bulk flows with respect to the cosmic microwave background have very recently been detected on scales 100 Mpc/h and 300 Mpc/h by using two different techniques showing an excellent agreement in the motion direction.…

Astrophysics · Physics 2014-11-18 Jose Beltran Jimenez , Antonio L. Maroto

The Galactic magnetic field is important in the dynamics of our Galaxy. It is believed to play a role in star formation and influence the structure of the Galaxy. In order to understand how the Galactic magnetic field originally formed or…

Astrophysics of Galaxies · Physics 2010-12-15 Kyle Rae , Jo-Anne Brown

The lack of power at large angular scales in the CMB temperature anisotropy pattern is a feature known to depend on the size of the Galactic mask. Not only the large scale anisotropy power in the CMB is lower than the best-fit $\Lambda$CDM…

Cosmology and Nongalactic Astrophysics · Physics 2020-03-11 U. Natale , A. Gruppuso , D. Molinari , P. Natoli

The large scale pattern in the arrival directions of extragalactic cosmic rays that reach the Earth is different from that of the flux arriving to the halo of the Galaxy as a result of the propagation through the galactic magnetic field.…

High Energy Astrophysical Phenomena · Physics 2017-06-27 D. Harari , S. Mollerach , E. Roulet

We are in motion against the cosmic backdrop. This motion is evidenced by the systematic temperature shift - or dipole anisotropy - observed in the Cosmic Microwave Background radiation (CMB). Because of the Doppler effect, the temperature…

Astrophysics · Physics 2015-06-24 Chris Blake , Jasper Wall

A dozen most luminous galaxies at distances up to 10 Mpc from the Local Group are moving away from the group forming the local expansion flow of giants. We use recent Hubble Space Telescope data on the local giants and their numerous…

Cosmology and Nongalactic Astrophysics · Physics 2015-08-19 A. D. Chernin , N. V. Emelyanov , I. D. Karachentsev

An analysis of the Cosmological Constant $\Omega_\Lambda$ fitted to subsamples of the Pantheon+ Type Ia SN sample spanning 2$\pi$ sterradians for a grid of 432 pole positions covering the whole sky reveals two large scale asymmetries. One…

Cosmology and Nongalactic Astrophysics · Physics 2024-06-04 Alejandro Clocchiatti , Ósmar Rodríguez , Ariel Órdenes Morales , Benjamín Cuevas-Tapia

The magnetic field in our Galaxy is not well known and is difficult to measure. A spiral regular field in the disk between the Galactic arms is favored by observations, however it is still controversial if the field reverses from arm to…

Astrophysics · Physics 2009-11-13 Jaime Alvarez-Muñiz , Todor Stanev

We study the rotational motion of the galaxy cluster Abell 2107 at redshift z = 0.04 and its connection to nearby large-scale structures using a large amount of spectroscopic redshift data. By combining 978 new redshifts from the…

Astrophysics of Galaxies · Physics 2018-12-26 Hyunmi Song , Ho Seong Hwang , Changbom Park , Rory Smith , Maret Einasto

A large bulk flow, which is in tension with the Lambda Cold Dark Matter ($\Lambda$CDM) cosmological model, has been observed. In this paper, we provide a physically plausible explanation of this bulk flow, based on the assumption that some…

Cosmology and Nongalactic Astrophysics · Physics 2011-05-19 Yin-Zhe Ma , Christopher Gordon , Hume A. Feldman

Recent large-scale peculiar velocity surveys suggest that large matter volumes could be moving with appreciable velocity with respect to the CMB rest frame. If confirmed, such results could conflict with the Cosmological Principle according…

Astrophysics · Physics 2008-11-26 Antonio L. Maroto

We present a catalog of extragalactic proper motions created using archival VLBI data and our own VLBA astrometry. The catalog contains 713 proper motions, with average uncertainties of ~ 24 muas/yr, including 40 new or improved proper…

Astrophysics of Galaxies · Physics 2017-10-06 Alexandra E Truebenbach , Jeremy Darling

We consider the bending of light around a compact astrophysical object with both the electric field and the magnetic field in Einstein-Born-Infeld theory. From the null geodesic of a light ray passing a massive object with electric charge…

General Relativity and Quantum Cosmology · Physics 2024-10-21 Jin Young Kim

The production of antihydrogen by several research groups provides the opportunity to measure the gravitational behaviour of antimatter in the gravitational field of the Earth. The predictions in the literature range from normal attraction…

General Physics · Physics 2024-01-17 K. Wilhelm , B. N. Dwivedi

Extragalactic proper motions can reveal a variety of cosmological and local phenomena over a range of angular scales. These include observer-induced proper motions, such as the secular aberration drift caused by the solar acceleration about…

Cosmology and Nongalactic Astrophysics · Physics 2018-10-16 Jeremy Darling , Alexandra Truebenbach , Jennie Paine

We investigate tachyon dynamics with an inverse power-law potential $V(\phi) \propto \phi^{-\alpha}$. We find global attractors of the dynamics leading to a dust behaviour for $\alpha > 2$ and to an accelerating universe for $0 < \alpha \le…

Astrophysics · Physics 2011-07-18 L. Raul W. Abramo , Fabio Finelli

The validity of Hubble's law defies the determination of the center of the big bang expansion, even if it exists. Every point in the expanding universe looks like the center from which the rest of the universe flies away. In this article,…

Astrophysics · Physics 2007-05-23 Yukio Tomozawa

One possibility for explaining the apparent accelerating expansion of the universe is that we live in the center of a spherically inhomogeneous universe. Although current observations cannot fully distinguish $\Lambda$CDM and these…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Kent Yagi , Atsushi Nishizawa , Chul-Moon Yoo

The redshift drift of objects moving in the Hubble flow has been proposed as a powerful model-independent probe of the underlying cosmology. A measurement of the first and second order redshift derivatives appears to be well within the…

Cosmology and Nongalactic Astrophysics · Physics 2018-09-21 Fulvio Melia

General relativistic deflection of light by mass, dipole, and quadrupole moments of gravitational field of a moving massive planet in the Solar system is derived in the approximation of the linearized Einstein equations. All terms of order…

General Relativity and Quantum Cosmology · Physics 2007-12-05 Sergei Kopeikin , Valeri Makarov