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25 papers · 1 filter
The Velocity Dispersion Function of Very Massive Galaxy Clusters: Abell 2029 and Coma
Jubee Sohn, Margaret J. Geller, H. Jabran Zahid +3
Based on an extensive redshift survey for galaxy cluster Abell 2029 and Coma, we measure the luminosity functions (LFs), stellar mass functions (SMFs) for the entire cluster member…
Chromospheric and Coronal Activity in the 500-Myr-old Open Cluster M37: Evidence for Coronal Stripping?
Alejandro Núñez, Marcel A. Agüeros, Kevin R. Covey +1
We present the results of a spectroscopic survey to characterize chromospheric activity, as measured by H emission, in low-mass members of the 500-Myr-old open cluster M37. Comb…
Rotating Stars from Kepler Observed with Gaia DR1
James R. A. Davenport
Astrometric data from the recent Gaia Data Release 1 has been matched against the sample of stars from Kepler with known rotation periods. A total of 1,299 bright rotating stars we…
MOST Observations of our Nearest Neighbor: Flares on Proxima Centauri
James R. A. Davenport, David M. Kipping, Dimitar Sasselov +2
We present a study of white light flares from the active M5.5 dwarf Proxima Centauri using the Canadian microsatellite MOST. Using 37.6 days of monitoring data from 2014 and 2015,…
No Conclusive Evidence for Transits of Proxima b in MOST photometry
David M. Kipping, Chris Cameron, Joel D. Hartman +21
The analysis of Proxima Centauri's radial velocities recently led Anglada-Escudé et al. (2016) to claim the presence of a low mass planet orbiting the Sun's nearest star once every…
Anomalous spectral lines and relic quantum nonequilibrium
Nicolas G. Underwood, Antony Valentini
We describe features that could be observed in the line spectra of relic cosmological particles should quantum nonequilibrium be preserved in their statistics. According to our arg…