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Estimating Distances from Parallaxes
Bailer-Jones, Coryn A. L.
Astrometric surveys such as Gaia and LSST will measure parallaxes for hundreds of millions of stars. Yet they will not measure a single distance. Rather, a distance must be estimated from a parallax. In this didactic article, I show that doing this is not trivial once the fractional parallax error is larger than about 20%, which will be the case f…
Revised Filter Profiles and Zero Points for Broadband Photometry
Mann, Andrew W.; von Braun, Kaspar
Estimating accurate bolometric fluxes for stars requires reliable photometry to absolutely flux calibrate the spectra. This is a significant problem for studies of very bright stars, which are generally saturated in modern photometric surveys. Instead we must rely on photometry with less precise calibration. We utilize precisely flux-calibrated sp…
Elemental Abundance Analyses with DAO Spectrograms. XXXVI. The Hot Metallic Line Stars Theta Leonis and Omicron Pegasi
Adelman, Saul J.; Gulliver, Austin F.; Heaton, Robert J.
A New Luminous Blue Variable in M31
Humphreys, Roberta M.; Gordon, Michael S.; Martin, John C.
Not Available
Based on observations with the Multiple Mirror Telescope, a joint facility of the Smithsonian Institution and the University of Arizona.Spectro-Imaging of the Asymmetric Inner Molecular and Dust Shell Region of the Mira Variable W Hya with MIDI/VLTI
Quirrenbach, A.; Lopez, B.; Kerschbaum, F. +4 more
Not Available
Based on observations made with the Very Large Telescope Interferometer (VLTI) at the Paranal Observatory under program IDs 083.D-0294, 084.D-0334, and 085.D-0201.Study of COROT 310266512: A Light Curve with Primary, Secondary, and Tertiary Eclipses
Chou, Dean-Yi; Fernández Fernández, Javier
Hot Gaseous Stellar Disks Avoid Regions of Low Interstellar Densities
Abt, Helmut A.
The Short Bursts in SGR 1806-20, 1E 1048-5937, and SGR 0501+4516
Chen, Yupeng; Zhang, Shu; Ji, Long +4 more
We analyzed temporal and spectral properties, focusing on the short bursts, for three anomalous X-ray pulsars (AXPs) and soft gamma repeaters (SGRs), including SGR 1806-20, 1E 1048-5937 and SGR 0501+4516. Using the data from XMM-Newton, we located the short bursts by Bayesian blocks algorithm. The short bursts' duration distributions for three sou…