Year: 2011
Type: article
Abstract: In the standard cosmological model, the merger remnant of the Milky Way and Andromeda (Milkomeda) will be the only galaxy remaining within our event horizon once the Universe has aged by another factor of ten, ∼ 10 11 years after the Big Bang. After that time, the only extragalactic sources of light in the observable cosmic volume will be hypervelocity stars being ejected continuously from Milkomeda. Spectroscopic detection of the velocity-distance relation or the evolution in the Doppler shifts of these stars will allow a precise measurement of the vacuum mass density as well as the local matter distribution. Already in the near future, the next generation of large telescopes will allow photometric detection of individual stars out to the edge of the Local Group, and may target the ∼ 10 5±1 hypervelocity stars that originated in it as cosmological tracers.
Author: Abraham Loeb
Institution: Harvard University
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Awards: G2039531031, Testing Accretion Physics and Strong-Field Gravity by Imaging Accreting Black Holes, G5058766606, G546331916, RESEARCH TITLE: LUNAR UNIVERSITY NODE FOR ASTROPHYSICS RESEARCH (LUNAR): EXPLORING THE COSMOS FROM THE MOON LUNAR WILL ADDRESS THE QUESTION: HOW, MODELING THE POWER SPECTRUM OF GALAXIES IN HIGH-REDSHIFT SURVEYSOUR GOAL IN THIS STUDY IS TO DEVELOP THE THEORETICAL TOOLS THAT WILL ALLOW US TO OBT
OpenAlex ID: W2075043874