392 citations · 622 across the 24 of their papers we have counts for
17 papers · 1 filter
TESS Cycle 2 observations of roAp stars with 2-min cadence data
D. L. Holdsworth, M. S. Cunha, M. Lares-Martiz +46
We present the results of a systematic search of the Transiting Exoplanet Survey Satellite (TESS) 2-min cadence data for new rapidly oscillating Ap (roAp) stars observed during the…
101 Eclipsing Quadruple Star Candidates Discovered in TESS Full Frame Images
Veselin B. Kostov, Brian P. Powell, Saul A. Rappaport +17
We present our second catalog of quadruple star candidates, containing 101 systems discovered in TESS Full-Frame Image data. The targets were initially detected as eclipsing binary…
BU Canis Minoris -- the Most Compact Known Flat Doubly Eclipsing Quadruple System
Theodor Pribulla, Tamás Borkovits, Rahul Jayaraman +25
We have found that the 2+2 quadruple star system BU CMi is currently the most compact quadruple system known, with an extremely short outer period of only 121 days. The previous re…
The magnetic, spectroscopic, and photometric variability of the Wolf-Rayet star WR55
S. P. Järvinen, S. Hubrig, R. Jayaraman +2
Studies of magnetic fields in the most evolved massive stars, the Wolf-Rayet stars, are of special importance because they are progenitors of certain types of supernovae. The first…
Are magnetic fields universal in O-type multiple systems?
S. Hubrig, S. P. Jarvinen, I. Ilyin +2
Although significant progress has been achieved in recent surveys of the magnetism in massive stars, the origin of the detected magnetic fields remains to be the least understood t…
HD 42477: coupled r modes, g modes and a p mode in an A0Vnne star
D. W. Kurtz, R. Jayaraman, P. Sowicka +4
Several studies have shown that a number of stars pulsating in p modes lie between the Cep and Sct instability strips in the Hertzsprung-Russell (HR) Diagram. At present, t…
V994 Her: A Unique Triply Eclipsing Sextuple Star System
P. Zasche, T. Borkovits, R. Jayaraman +23
We report the discovery with of a third set of eclipses from V994 Herculis (TIC 424508303), previously only known as a doubly-eclipsing system. The key implication of this d…
Magnetic field measurements of sharp-lined Ap stars
S. P. Järvinen, S. Hubrig, R. Jayaraman +2
Previous observations suggested that Ap and Bp stars exhibit a bimodal distribution of surface magnetic field strengths and that actually only few or no stars exist with magnetic d…
TIC 114936199: A Quadruple Star System with a 12-day Outer Orbit Eclipse
Brian P. Powell, Saul A. Rappaport, Tamás Borkovits +19
We report the discovery with TESS of a remarkable quadruple star system with a 2+1+1 configuration. The two unique characteristics of this system are that (i) the inner eclipsing b…
Kepler K2 and TESS observations of two magnetic cataclysmic variables: The new asynchronous polar SDSS J084617.11+245344.1 and Paloma
Colin Littlefield, D. W. Hoard, Peter Garnavich +7
There have been relatively few published long-duration, uninterrupted light curves of magnetic cataclysmic variable stars in which the accreting white dwarf's rotational frequency…
Tidally Tilted Pulsations in HD 265435, a subdwarf B Star with a Close White Dwarf Companion
Rahul Jayaraman, Gerald Handler, Saul Rappaport +4
Tidally tilted pulsators (TTPs) are an intriguing new class of oscillating stars in binary systems; in such stars, the pulsation axis coincides with the line of apsides, or semi-ma…
Tidally Tilted Pulsators
Gerald Handler, Rahul Jayaraman, Donald W. Kurtz +2
The tidally tilted pulsators are a new type of oscillating star in close binary systems that have their pulsation axis in the orbital plane because of the tidal distortion caused b…
Could the Magnetic Star HD 135348 Possess a Rigidly Rotating Magnetosphere?
Rahul Jayaraman, Swetlana Hubrig, Daniel L. Holdsworth +4
We report the detection and characterization of a new magnetospheric star, HD 135348, based on photometric and spectropolarimetric observations. The TESS light curve of this star e…
Two New roAp Stars Discovered with TESS
Rahul Jayaraman, Donald W. Kurtz, Gerald Handler +2
We present two new rapidly oscillating Ap (roAp) stars, TIC 198781841 and TIC 229960986, discovered in TESS photometric data. The periodogram of TIC 198781841 has a large peak at 1…
TIC 5724661: A Long-Period Binary with a Pulsating sdB Star and Scuti Variable
Rahul Jayaraman, Saul Rappaport, Lorne Nelson +8
Using TESS 20-sec cadence data, we have discovered an unusual combination of pulsating stars in what we infer to be a binary system. The binary consists of a standard Scuti sta…
TIC 168789840: A Sextuply-Eclipsing Sextuple Star System
Brian P. Powell, Veselin B. Kostov, Saul A. Rappaport +48
We report the discovery of a sextuply-eclipsing sextuple star system from TESS data, TIC 168789840, also known as TYC 7037-89-1, the first known sextuple system consisting of three…
Complex Modulation of Rapidly Rotating Young M Dwarfs: Adding Pieces to the Puzzle
Maximilian N. Günther, David A. Berardo, Elsa Ducrot +37
New sets of young M dwarfs with complex, sharp-peaked, and strictly periodic photometric modulations have recently been discovered with Kepler/K2 (scallop shells) and TESS (complex…