86 citations · 974 across the 74 of their papers we have counts for
8 papers · 1 filter
The Intriguing Polar EU Cancri in the Eyes of Kepler K2
Katherine Hill, Colin Littlefield, Peter Garnavich +1
We present the light curve of EU Cnc, the first published analysis of a Kepler light curve of a polar. Although EU Cnc was extremely faint during campaign 16 and 18 its light curve…
The Eclipsing Accreting White Dwarf Z Chameleontis as Seen with TESS
J. M. C. Court, S. Scaringi, S. Rappaport +8
We present results from a study of TESS observations of the eclipsing dwarf nova system Z Cha, covering both an outburst and a superoutburst. We discover that Z Cha undergoes hyste…
ASASSN-18fk: A new WZ Sge-type dwarf nova with multiple rebrightenings and a new candidate for a superhumping intermediate polar
E. Pavlenko, K. Niijima, P. Mason +23
We present the result of a multi-longitude campaign on the photometric study of the dwarf nova ASASSN-18fk during its superoutburst in 2018. It was observed with 18 telescopes at 1…
Hard-state accretion disk winds from black holes: the revealing case of MAXI J1820+070
T. Muñoz-Darias, F. Jiménez-Ibarra, G. Panizo-Espinar +16
We report on a detailed optical spectroscopic follow-up of the black hole transient MAXI J1820+070 (ASASSN-18ey). The observations cover the main part of the X-ray binary outburst,…
Analysis of a Century's Worth of AR Scorpii Photometry from DASCH and ASAS-SN
Erik Peterson, Colin Littlefield, Peter Garnavich
AR Scorpii (AR Sco) is a binary star system containing the only known white dwarf (WD) pulsar. Previously reported photometric datasets only provide coverage back to 2005, but we e…
The Rise and Fall of the King: The Correlation between FO Aquarii's Low States and the White Dwarf's Spindown
Colin Littlefield, Peter Garnavich, Mark R. Kennedy +45
The intermediate polar FO Aquarii (FO Aqr) experienced its first-reported low-accretion states in 2016, 2017, and 2018, and using newly available photographic plates, we identify p…
Fast-Cadence TESS Photometry and Doppler Tomography of the Asynchronous Polar CD Ind: A Revised Accretion Geometry from Newly Proposed Spin and Orbital Periods
Colin Littlefield, Peter Garnavich, Koji Mukai +5
The TESS spacecraft observed the asynchronous polar CD Ind at a two-minute cadence almost continuously for 28 days in 2018, covering parts of 5 consecutive cycles of the system's 7…
Driving the Beat: Time-Resolved Spectra of the White Dwarf Pulsar AR Scorpii
Peter Garnavich, Colin Littlefield, Stella Kafka +4
We obtained high temporal resolution spectroscopy of the unusual binary system AR Sco covering nearly an orbit. The H emission shows a complex line structure similar to that see…