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Constraining the Stellar Mass Function in the Galactic Center via Mass Loss from Stellar Collisions
Douglas Rubin, Abraham Loeb
The dense concentration of stars and high velocity dispersions in the Galactic centre imply that stellar collisions frequently occur. Stellar collisions could therefore result in s…
Pulsar-Black Hole Binaries in the Galactic Center
C. -A. Faucher-Giguere, Abraham Loeb
Binaries consisting of a pulsar and a black hole (BH) are a holy grail of astrophysics, both for their significance for stellar evolution and for their potential application as pro…
Cores in Dwarf Galaxies from Dark Matter with a Yukawa Potential
Abraham Loeb, Neal Weiner
We show that cold dark matter particles interacting through a Yukawa potential could naturally explain the recently observed cores in dwarf galaxies without affecting the dynamics…
Extrapolating the Evolution of Galaxy Sizes to the Epoch of Reionization
Stuart Wyithe, Abraham Loeb
We use data on the high-redshift evolution of the size distribution and luminosity function of galaxies to constrain the relationship between their star formation efficiency and st…
Evidence for Low Black Hole Spin and Physically Motivated Accretion Models from Millimeter VLBI Observations of Sagittarius A*
Avery E. Broderick, Vincent L. Fish, Sheperd S. Doeleman +1
Millimeter very-long baseline interferometry (mm-VLBI) provides the novel capacity to probe the emission region of a handful of supermassive black holes on sub-horizon scales. For…
Effect of Streaming Motion of Baryons Relative to Dark Matter on the Formation of the First Stars
Athena Stacy, Volker Bromm, Abraham Loeb
We evaluate the effect of a supersonic relative velocity between the baryons and dark matter on the thermal and density evolution of the first gas clouds at z < 50. Through a serie…