580 citations · 3.5k across the 109 of their papers we have counts for
6 papers · 1 filter
The first determination of the viscosity parameter in the circumstellar disk of a Be Star
Alex C. Carciofi, Jon E. Bjorkman, Sebastián A. Otero +5
Be stars possess gaseous circumstellar decretion disks, which are well described using standard -disk theory. The Be star 28 CMa recently underwent a long outburst followed by a…
SPARC4: A Simultaneous Polarimeter and Rapid Camera in 4 Bands
C. V. Rodrigues, F. J. Jablonski, K. Taylor +13
We present the basic concept of a new astronomical instrument: SPARC4 - Simultaneous Polarimeter and Rapid Camera in 4 bands. SPARC4 combines in one instrument: (i) photometric and…
AMBER high-spectral resolution interferometry of Be stars: More than just stars and disks?
S. Stefl, T. Rivinius, D. Baade +1
High spectral-resolution Br-gamma VLTI/AMBER observations of classical Be stars reveal complex visibility, phase, and closure phase profiles, which were not seen in previous lower-…
The Compton-Thick Seyfert 2 Nucleus of NGC3281: Torus Constraints from the 9.7m Silicate Absorption
Dinalva A. Sales, M. G. Pastoriza, R. Riffel +3
We present mid infrared (Mid-IR) spectra of the Compton-thick Seyfert 2 galaxy NGC\,3281, obtained with the Thermal-Region Camera Spectrograph (T-ReCS) at the Gemini South telescop…
A New Diagnostic of the Radial Density Structure of Be Disks
Zachary H. Draper, John P. Wisniewski, Karen S. Bjorkman +5
We analyze the intrinsic polarization of two classical Be stars in the process of losing their circumstellar disks via a Be to normal B star transition originally reported by Wisni…
Disk-Loss and Disk Renewal Phases in Classical Be Stars II. Detailed Analysis of Spectropolarimetric Data
Zachary H. Draper, John P. Wisniewski, Karen S. Bjorkman +4
In Wisniewski et al. 2010, paper I, we analyzed 15 years of spectroscopic and spectropolarimetric data from the Ritter and Pine Bluff Observatories of 2 Be stars, 60 Cygni and π Aq…