A
Aaron M. Geller
Researcher at Northwestern University
Publications - 105
Citations - 3162
Aaron M. Geller is an academic researcher from Northwestern University. The author has contributed to research in topics: Open cluster & Stars. The author has an hindex of 32, co-authored 102 publications receiving 2824 citations. Previous affiliations of Aaron M. Geller include Association of Universities for Research in Astronomy & University of Chicago.
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Journal ArticleDOI
On the rate of black hole binary mergers in galactic nuclei due to dynamical hardening
Nathan W. C. Leigh,Nathan W. C. Leigh,Nathan W. C. Leigh,Aaron M. Geller,Aaron M. Geller,Barry McKernan,Barry McKernan,Barry McKernan,K. E. S. Ford,K. E. S. Ford,K. E. S. Ford,Mordecai-Mark Mac Low,Jillian Bellovary,Jillian Bellovary,Zoltan Haiman,Zoltan Haiman,Wladimir Lyra,Johan Samsing,Matthew O'Dowd,Matthew O'Dowd,Bence Kocsis,S. Endlich +21 more
TL;DR: In this paper, the authors derived an analytic model for the single-binary encounter rate in a nucleus with spherical and disk components hosting a super-massive black hole (SMBH) and determined the total number of encounters needed to harden a BHB to the point that inspiral due to gravitational wave emission occurs before the next three-body scattering event.
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A binary star fraction of 76 per cent and unusual orbit parameters for the blue stragglers of NGC 188.
TL;DR: Data show that most, and possibly all, blue straggglers derive from multiple-star systems, and indicate that the several formation processes operate simultaneously, and suggest that rapid rotation of blue stragglers may place upper limits on their ages.
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Wiyn open cluster study. xxxii. stellar radial velocities in the old open cluster ngc 188
TL;DR: In this article, the authors present the results of their ongoing radial-velocity (RV) survey of the old (7 Gyr) open cluster NGC 188, which spans a time baseline of 11 years, a magnitude range of 12 ≤ V ≤ 16.5, and a 1° diameter region on the sky.
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Stellar Radial Velocities in the Old Open Cluster M67 (NGC 2682). I. Memberships, Binaries, and Kinematics
TL;DR: In this article, the authors present results from 13776 radial-velocity (RV) measurements of 1278 candidate members of the old (4 Gyr) open cluster M67 (NGC 2682).
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A mass transfer origin for blue stragglers in NGC 188 as revealed by half-solar-mass companions
TL;DR: The data are highly consistent with a mass transfer origin for the long-period blue straggler binaries in NGC 188, in which the companions would be white dwarfs of about half a solar mass.