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10 papers · 2 filters
Eclipses of continuous gravitational waves as a probe of stellar structure
Pablo Marchant, Katelyn Breivik, Christopher P. L. Berry +2
Although gravitational waves only interact weakly with matter, their propagation is affected by a gravitational potential. If a gravitational wave source is eclipsed by a star, mea…
Weighing in on black hole binaries with BPASS: LB-1 does not contain a 70M black hole
J. J. Eldridge, E. R. Stanway, K. Breivik +3
The recent identification of a candidate very massive 70 M(Sun) black hole is at odds with our current understanding of stellar winds and pair-instability supernovae. We investigat…
Weighing the Darkness: Astrometric Mass Measurement of Hidden Stellar Companions using Gaia
Jeff J. Andrews, Katelyn Breivik, Sourav Chatterjee
In astrometric binaries, the presence of a dark, unseen star can be inferred from the gravitational pull it induces on its luminous binary companion. While the orbit of such binari…
Investigating the origin of the spectral line profiles of the Hot Wolf-Rayet Star WR2
A. -N. Chené, N. St-Louis, A. F. J. Moffat +12
The hot WN star WR2 (HD6327) has been claimed to have many singular characteristics. To explain its unusually rounded and relatively weak emission line profiles, it has been propos…
Spitzer Microlensing parallax reveals two isolated stars in the Galactic bulge
Weicheng Zang, Yossi Shvartzvald, Tianshu Wang +90
We report the mass and distance measurements of two single-lens events from the 2017 Spitzer microlensing campaign. The ground-based observations yield the detection of finite-sour…
OGLE-2017-BLG-1186: first application of asteroseismology and Gaussian processes to microlensing
Shun-Sheng Li, Weicheng Zang, Andrzej Udalski +102
We present the analysis of the event OGLE-2017-BLG-1186 from the 2017 Spitzer microlensing campaign. This is a remarkable microlensing event because its source is photometrically b…