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Shocks and Photoionization of the Inner 650 AU Jet of the Interacting Binary Star R Aquarii from Multiwavelength Hubble Space Telescope Observations
Caroline D. Huang, Margarita Karovska, Warren Hack +3
Astrophysical jets are present in a range of environments, including young stellar objects, X-ray binaries, and active galactic nuclei, but their formation is still not fully under…
Center to limb variation of transition region Doppler shift in active regions
Abhishek Rajhans, Durgesh Tripathi, Vinay L. Kashyap +2
Studying Doppler shifts provides deeper insights into the flow of mass and energy in the solar atmosphere. We perform a comprehensive measurement of Doppler shifts in the transitio…
X-ray Activity Variations and Coronal Abundances of the Star-Planet Interaction candidate HD 179949
Anshuman Acharya, Vinay L. Kashyap, Steven H. Saar +2
We carry out detailed spectral and timing analyses of the X-ray data of HD 179949, a prototypical example of a star with a close-in giant planet with possible star-planet…
Flows in Enthalpy Based Thermal Evolution of Loops
Abhishek Rajhans, Durgesh Tripathi, Stephen Bradshaw +2
Plasma-filled loop structures are common in the solar corona. Because detailed modeling of the dynamical evolution of these structures is computationally costly, an efficient metho…
Hydrodynamics of small transient brightenings in Solar corona
Abhishek Rajhans, Durgesh Tripathi, Vinay L. Kashyap
Small scale transients occur in the Solar corona at much higher frequencies than flares and play a significant role in coronal dynamics. Here we study three well-identified transie…
X-ray Observations of the Peculiar Cepheid V473 Lyr Identify A Low-Mass Companion
Nancy Remage Evans, Ignazio Pillitteri, Laszlo Molnar +17
V473 Lyr is a classical Cepheid which is unique in having substantial amplitude variations with a period of approximately 3.3 years, thought to be similar to the Blazhko variations…