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99 papers · 2 filters
Examining the Infrared Variable Star Population Discovered in the Small Magellanic Cloud Using the SAGE-SMC Survey
Elizabeth Polsdofer, Jonathan Seale, Marta Sewilo +4
We present our study on the infrared variability of point sources in the Small Magellanic Cloud (SMC). We use the data from the Spitzer Space Telescope Legacy Program "Surveying th…
Tidal Torques on Misaligned Disks in Binary Systems
Stephen H. Lubow, Rebecca G. Martin, Chris Nixon
We extend previous studies of the tidal truncation of coplanar disks in binary systems to the more general case of noncoplanar disks. As in the prograde coplanar case, Lindblad res…
Direct Spectrum of the Benchmark T dwarf HD 19467 B
Justin R. Crepp, Emily L. Rice, AAron Veicht +18
HD 19467 B is presently the only directly imaged T dwarf companion known to induce a measurable Doppler acceleration around a solar type star. We present spectroscopy measurements…
Variable stars in two open clusters within the Kepler 2-Campaign-0 field: M 35 and NGC 2158
D. Nardiello, L. R. Bedin, V. Nascimbeni +15
We present a multi-year survey aimed at collecting (1) high-precision (~5 milli-mag), (2) fast-cadence (~3 min), and (3) relatively long duration (~10 days) multi-band photometric…
Calibration of the Mixing-Length Theory for Convective White Dwarf Envelopes
P. -E. Tremblay, H. -G. Ludwig, B. Freytag +3
A calibration of the mixing-length parameter in the local mixing-length theory (MLT) is presented for the lower part of the convection zone in pure-hydrogen atmosphere white dwarfs…
Magnetic field topology and chemical spot distributions in the extreme Ap star HD 75049
O. Kochukhov, N. Rusomarov, J. A. Valenti +7
Intermediate-mass, magnetic chemically peculiar (Ap) stars provide a unique opportunity to study the topology of stellar magnetic fields in detail and to investigate magnetically d…