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29 papers · 1 filter
Col-OSSOS: Colors of the Interstellar Planetesimal 1I/`Oumuamua
Michele T. Bannister, Megan E. Schwamb, Wesley C. Fraser +10
The recent discovery by Pan-STARRS1 of 1I/2017 U1 (`Oumuamua), on an unbound and hyperbolic orbit, offers a rare opportunity to explore the planetary formation processes of other s…
The Close AGN Reference Survey (CARS): Mrk 1018 halts dimming and experiences strong short-term variability
M. Krumpe, B. Husemann, G. R. Tremblay +12
After changing optical AGN type from 1.9 to 1 in 1984, the AGN Mrk 1018 recently reverted back to its type 1.9 state. Our ongoing monitoring now reveals that the AGN has halted its…
Galaxy populations in massive z=0.2-0.9 clusters: I. Analysis of spectroscopy
Inger Jorgensen, Kristin Chiboucas, Emily Berkson +3
We present an analysis of stellar populations in passive galaxies in seven massive X-ray clusters at z=0.19-0.89. Based on absorption line strengths measured from our high signal-t…
BRITE-Constellation high-precision time-dependent photometry of the early-O-type supergiant Puppis unveils the photospheric drivers of its small- and large-scale wind structures
Tahina Ramiaramanantsoa, Anthony F. J. Moffat, Robert Harmon +33
From months of dual-band optical photometric monitoring at the mmag level, BRITE-Constellation has revealed two simultaneous types of variability in the O4I(n)fp star …
Variability of the Lowest Mass Objects in the AB Doradus Moving Group
Johanna M. Vos, Katelyn N. Allers, Beth A. Biller +5
We present the detection of [m] photometric variability in two young, L/T transition brown dwarfs, WISE J004701.06+680352.1 (W0047) and 2MASS J2244316+204343 (2M2244) using…
CCD Parallaxes for 309 Late-type Dwarfs and Subdwarfs
Conard C. Dahn, Hugh C. Harris, John P. Subasavage +16
New, updated, and/or revised CCD parallaxes determined with the Strand Astrometric Reflector at the Naval Observatory Flagstaff Station (NOFS) are presented. Included are results f…