59 citations · 273 across the 15 of their papers we have counts for
14 papers
Evolution of the recent high-accretion state of the recurrent nova T CrB: HST, Swift, NuSTAR, and XMM-Newton observations
G. J. M. Luna, N. P. M. Kuin, K. Mukai +3
As the recurrent nova T Coronae Borealis (T CrB) approaches its next predicted thermonuclear eruption, it is currently exhibiting a "super-active state" (SAS) characterized by enha…
Modeling the high-brightness state of the recurrent nova T CrB as an enhanced mass-transfer event
Wagner Schlindwein, Raymundo Baptista, Gerardo Juan Manuel Luna
T~Coronae Borealis is the nearest symbiotic recurrent nova. Twice in the last two centuries, in 1866 and 1946, the accreted material ignited on the surface of the white dwarf via r…
Increasing activity in T CrB suggests nova eruption is impending
Gerardo J. M. Luna, J. L. Sokoloski, K. Mukai +1
Estimates of the accretion rate in symbiotic recurrent novae (RNe) often fall short of theoretical expectations by orders of magnitude. This apparent discrepancy can be resolved if…
SU Lyn: diagnosing the boundary layer with UV and hard X-ray data
Raimundo Lopes de Oliveira, Jennifer Sokoloski, Gerardo Juan Luna +2
Symbiotic stars in which the symbiotic phenomenon is powered solely by accretion, often at an average rate that is higher than in cataclysmic variable stars, provide an important o…
Swift observations of the 2015 outburst of AG Peg -- from slow nova to classical symbiotic outburst
Gavin Ramsay, J. L. Sokoloski, G. J. M. Luna +1
Symbiotic stars often contain white dwarfs with quasi-steady shell burning on their surfaces. However, in most symbiotics, the origin of this burning is unclear. In symbiotic slow…
Testing the cooling flow model in the intermediate polar EX Hydrae
G. J. M. Luna, J. C. Raymond, N. S. Brickhouse +3
We use the best available X-ray data from the intermediate polar EX Hydrae to study the cooling-flow model often applied to interpret the X-ray spectra of these accreting magnetic…
HST FUV monitoring of TW Hya
H. M. Günther, N. S. Brickhouse, A. K. Dupree +3
Classical T Tauri stars (CTTS) are young (< 10 Myr), cool stars that actively accrete matter from a disk. They show strong, broad and asymmetric, atomic FUV emission lines. Neither…
Symbiotic stars in X-rays II: faint sources detected with XMM-Newton and Chandra
N. E. Nuñez, G. J. M. Luna, I. Pillitteri +1
We report the detection, with and XMM-, of faint, soft X-ray emission from four symbiotics stars that were not known to be X-ray sources. These four o…
X-Ray Determination of the Variable Rate of Mass Accretion onto TW Hydrae
N. S. Brickhouse, S. R. Cranmer, A. K. Dupree +3
Diagnostics of electron temperature (T_e), electron density (n_e), and hydrogen column density (N_H) from the Chandra High Energy Transmission Grating spectrum of He-like Ne IX in…
TW Hya: Spectral Variability, X-Rays, and Accretion Diagnostics
A. K. Dupree, N. S. Brickhouse, S. R. Cranmer +8
The nearest accreting T Tauri star, TW Hya was observed with spectroscopic and photometric measurements simultaneous with a long se gmented exposure using the CHANDRA satellite. Co…
Implications of the non-detection of X-ray emission from HD 149427
Matthias Stute, Gerardo J. M. Luna
HD 149427 is a very enigmatic object. It has been classified either as a planetary nebula or as a D'-type symbiotic star. Its distance is also highly uncertain. Furthermore, HD 149…
Chandra detection of extended X-ray emission from the recurrent nova RS Ophiuchi
G. J. M. Luna, R. Montez, J. L. Sokoloski +2
Radio, infrared, and optical observations of the 2006 eruption of the symbiotic recurrent nova RS Ophiuchi (RS Oph) showed that the explosion produced non-spherical ejecta. Some of…
Updated Spin Ephemeris for the Cataclysmic Variable EX Hydrae
C. W. Mauche, N. S. Brickhouse, R. Hoogerwerf +3
Historical optical data are combined with more recent optical, extreme ultraviolet, and X-ray data to update the spin ephemeris of the cataclysmic variable EX Hya.
The Nature of the Hard-X-Ray Emitting Symbiotic Star RT Cru
G. J. M. Luna, J. L. Sokoloski
We describe Chandra High-Energy Transmission Grating Spectrometer observations of RT Cru, the first of a new sub-class of symbiotic stars that appear to contain white dwarfs (WDs)…