427 citations · 1.3k across the 22 of their papers we have counts for
22 papers
V1294 Aql = HD 184279: A bad boy among Be stars or an important clue to the Be phenomenon?
P. Harmanec, H. Božić, P. Koubský +21
A reliable determination of the basic physical properties and variability patterns of hot emission-line stars is important for understanding the Be phenomenon and ultimately, the e…
TIC 172900988: A Transiting Circumbinary Planet Detected in One Sector of TESS Data
Veselin B. Kostov, Brian P. Powell, Jerome A. Orosz +86
We report the first discovery of a transiting circumbinary planet detected from a single sector of TESS data. During Sector 21, the planet TIC 172900988b transited the primary star…
High-Amplitude gamma Doradus Variables
Ernst Paunzen, Klaus Bernhard, Stefan Huemmerich +3
According to most literature sources, the amplitude of the pulsational variability observed in gamma Doradus stars does not exceed 0.1 mag in Johnson V. We have analyzed fifteen hi…
The ASAS-SN Catalog of Variable Stars IX: The Spectroscopic Properties of Galactic Variable Stars
T. Jayasinghe, C. S. Kochanek, K. Z. Stanek +11
The All-Sky Automated Survey for Supernovae (ASAS-SN) provides long baseline ( yrs) band light curves for sources brighter than V mag across the whole sky.…
The ASAS-SN Catalog of Variable Stars VII: Contact Binaries are Different Above and Below the Kraft Break
T. Jayasinghe, K. Z. Stanek, C. S. Kochanek +11
We characterize W UMa type (EW) contact binaries, including new discoveries, using ASAS-SN -band all-sky light curves along with archival data fr…
The ASAS-SN Catalog of Variable Stars VI: An All-Sky Sample of Scuti Stars
T. Jayasinghe, K. Z. Stanek, C. S. Kochanek +10
We characterize an all-sky catalog of Scuti variables in ASAS-SN, which includes new discoveries. Using distances from \textit{Gaia} DR2, we deriv…
The ASAS-SN Catalog of Variable Stars V: Variables in the Southern Hemisphere
T. Jayasinghe, K. Z. Stanek, C. S. Kochanek +13
The All-Sky Automated Survey for Supernovae (ASAS-SN) provides long baseline ( yrs) light curves for sources brighter than V mag across the whole sky. As part…
The ASAS-SN Catalog of Variable Stars III: Variables in the Southern TESS Continuous Viewing Zone
T. Jayasinghe, K. Z. Stanek, C. S. Kochanek +13
The All-Sky Automated Survey for Supernovae (ASAS-SN) provides long baseline ( yrs) light curves for sources brighter than V mag across the whole sky. The Tran…
The ASAS-SN Catalog of Variable Stars II: Uniform Classification of 412,000 Known Variables
T. Jayasinghe, K. Z. Stanek, C. S. Kochanek +12
The variable stars in the VSX catalog are derived from a multitude of inhomogeneous data sources and classification tools. This inhomogeneity complicates our understanding of varia…
The life cycles of Be viscous decretion discs: The case of ω CMa
M. R. Ghoreyshi, A. C. Carciofi, L. R. Rimulo +6
We analyzed V-band photometry of the Be star ω CMa, obtained during the last four decades, during which the star went through four complete cycles of disc formation and dissipation…
An investigation of the photometric variability of confirmed and candidate Galactic Be stars using ASAS-3 data
Klaus Bernhard, Sebastián Otero, Stefan Hümmerich +3
We present an investigation of a large sample of confirmed (N=233) and candidate (N=54) Galactic classical Be stars (mean V magnitude range of 6.4 to 12.6 mag), with the main aim o…
The ASAS-SN Catalog of Variable Stars I: The Serendipitous Survey
T. Jayasinghe, C. S. Kochanek, K. Z. Stanek +11
The All-Sky Automated Survey for Supernovae (ASAS-SN) is the first optical survey to routinely monitor the whole sky with a cadence of days down to V mag. ASA…
New Photometric Observations and the 2015 Eclipse of the Symbiotic Nova Candidate ASAS J174600-2321.3
Franz-Josef Hambsch, Stefan Hümmerich, Klaus Bernhard +1
The eclipsing binary system ASAS J174600-2321.3, which has shown a conspicuous brightening of ~4 magnitudes (V) in the past, was recently identified as a symbiotic nova candidate.…
Interacting binaries W Serpentids and Double Periodic Variables
R. E. Mennickent, S. Otero, Z. Kołaczkowski
W Serpentids and Double Periodic Variables (DPVs) are candidates for close interacting binaries in a non-conservative evolutionary stage; while W Serpentids are defined by high-exc…
A search for photometric variability in magnetic chemically peculiar stars using ASAS-3 data
K. Bernhard, S. Huemmerich, S. Otero +1
The (magnetic) chemically peculiar (CP) stars of the upper main sequence are well-suited laboratories for investigating the influence of magnetic fields on the stellar surface beca…
The Curious Case of ASAS J174600-2321.3: an Eclipsing Symbiotic Nova in Outburst?
Stefan Huemmerich, Sebastian Otero, Patrick Tisserand +1
The star ASAS J174600-2321.3 was found to exhibit peculiar photometric variability (conspicuous brightening of about 4 magnitudes (V), fast luminosity declines, intrinsic pulsation…
New R Coronae Borealis and DY Persei Star Candidates and Other Related Objects Found in Photometric Surveys
Sebastián Otero, Stefan Huemmerich, Klaus Bernhard +1
We have carried out a search for new R Coronae Borealis (RCB) variables using the publicly accessible data from various photometric sky surveys and-whenever available-AAVSO visual…
Z Cam Stars in the Twenty-First Century
Mike Simonsen, David Boyd, Bill Goff +12
Z Cam stars are a small subset of dwarf novae that exhibit standstills in their light curves. Most modern literature and catalogs of cataclysmic variables quote the number of known…
The yellow hypergiant HR 5171 A: Resolving a massive interacting binary in the common envelope phase
O. Chesneau, A. Meilland, E. Chapellier +20
We initiated long-term optical interferometry monitoring of the diameters of unstable yellow hypergiants (YHG) with the goal of detecting both the long-term evolution of their radi…
Spectroscopic Observations of δSco Through the 2011 Periastron Passage
Th. Rivinius, S. Štefl, D. Baade +4
We present prelimiary results from a coordinated spectroscopic campaign in 2011, centered on the δSco periastron passage in July. Data have mostly been obtained with the FEROS/2.2…
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…
Combining Visual and Photoelectric Observations of Semi-Regular Red Variables
T. T. Moon, S. A. Otero, L. L. Kiss
Combining visual observations of SR variables with measurements of them using a photoelectric photometer is discussed then demonstrated using data obtained for the bright, southern…