Royal Astronomical Society

About: Royal Astronomical Society is a facility organization based out in London, United Kingdom. It is known for research contribution in the topics: Test particle & Apsidal precession. The organization has 71 authors who have published 97 publications receiving 3631 citations. The organization is also known as: RAS & Royal Astronomical Society, RAS.

Monthly Notices of the Royal Astronomical Society

Abstract: Monthly Notices is one of the three largest general primary astronomical research publications. It is an international journal, published by the Royal Astronomical Society. This article 1 describes its publication policy and practice.

Monthly notices of the royal astronomical society

Abstract: Monthly Notices is one of the three largest general primary astronomical research publications It is an international journal, published by the Royal Astronomical Society This article 1 describes its publication policy and practice

High-velocity outflows from young star-forming galaxies in the UKIDSS Ultra-Deep Survey

Abstract: We investigate galactic-scale outflows in the redshift range 0.71 500 km s^-1) are found in galaxies with the highest stellar masses and the youngest stellar populations. Our findings suggest that high velocity galactic outflows are mostly driven by star-forming processes rather than AGN, with implied mass outflow rates comparable to the rates of star formation. Such behaviour is consistent with models required to reproduce the high-redshift mass-metallicity relation.

Perturbed stellar motions around the rotating black hole in Sgr A * for a generic orientation of its spin axis

Abstract: Empirically determining the averaged variations of the orbital parameters of the stars orbiting the Supermassive Black Hole (SBH) hosted by the Galactic center (GC) in Sgr ${\mathrm{A}}^{*}$ is, in principle, a valuable tool to test the General Theory of Relativity (GTR), in regimes far stronger than those tested so far, and certain key predictions of it like the ``no-hair'' theorems. We analytically work out the long-term variations of all the six osculating Keplerian orbital elements of a test particle orbiting a nonspherical, rotating body with quadrupole moment ${Q}_{2}$ and angular momentum $\mathbit{S}$ for a generic spatial orientation of its spin axis $\stackrel{^}{\mathbit{k}}$. This choice is motivated by the fact that, basically, we do not know the position in the sky of the spin axis of the SBH in Sgr ${\mathrm{A}}^{*}$ with sufficient accuracy. We apply our results to S2, which is the closest star discovered so far having an orbital period ${P}_{\mathrm{b}}=15.98\text{ }\text{ }\mathrm{yr}$, and to a hypothetical closer star $X$ with ${P}_{\mathrm{b}}=0.5\text{ }\text{ }\mathrm{yr}$. Our calculations are quite general, not being related to any specific parameterization of $\stackrel{^}{\mathbit{k}}$, and can be applied also to astrophysical binary systems, stellar planetary systems, and planetary satellite geodesy in which different reference frames, generally not aligned with the primary's rotational axis, are routinely used.