924 citations · 1.2k across the 34 of their papers we have counts for
10 papers · 1 filter
Stellar activity in a post-merger Giant star
Hans Moritz GGunther, Hans Moritz Günther, C. Melis +4
Binary stars are the progenitors of exotic objects, such as supernovae and gravitational wave sources. However, some systems merge earlier when the primary expands into a giant sta…
Jets from the Upper Scorpius Variable Young Star System 2MASS J16075796-2040087 Via KECK/HIRES Spectro-astrometry
Emma Whelan, Miriam Keppler, Neal Turner +4
2MASS J16075796-2040087 is a ~ 5 Myr young star in Upper Sco with evidence for accretion bursts on a timescale of about 15 days and, uncommonly for its age, outflows traced by mult…
Hyperion: The origin of the stars A far-UV space telescope for high-resolution spectroscopy over wide fields
Erika Hamden, David Schiminovich, Shouleh Nikzad +30
We present Hyperion, a mission concept recently proposed to the December 2021 NASA Medium Explorer announcement of opportunity. Hyperion explores the formation and destruction of m…
X-ray emission from candidate stellar merger remnant TYC 2597-735-1 and its Blue Ring Nebula
Hans Moritz Günther, Keri Hoadley, Maximilian N. Günther +3
Tight binary or multiple star systems can interact through mass transfer and follow vastly different evolutionary pathways than single stars. The star TYC 2597-735-1 is a candidate…
A "blue ring nebula" surrounding a thousands of years old stellar merger
Keri Hoadley, Christopher Martin, Brian D. Metzger +7
Stellar mergers are a brief-lived but common phase in the evolution of binary star systems. Among the many astrophysical implications of these events include the creation of atypic…
Probing UV-Sensitive Pathways for CN and HCN Formation in Protoplanetary Disks with the Hubble Space Telescope
Nicole Arulanantham, K. France, P. Cazzoletti +6
The UV radiation field is a critical regulator of gas-phase chemistry in surface layers of disks around young stars. In an effort to understand the relationship between photocataly…
A UV-to-NIR Study of Molecular Gas in the Dust Cavity Around RY Lupi
N. Arulanantham, K. France, K. Hoadley +10
We present a study of molecular gas in the inner disk around RY Lupi, with spectra from HST-COS, HST-STIS, and VLT-CRIRES. We model the radial d…
Signatures of Hot Molecular Hydrogen Absorption from Protoplanetary Disks: I. Non-thermal Populations
Keri Hoadley, Kevin France, Nicole Arulanantham +2
The environment around protoplanetary disks (PPDs) regulates processes which drive the chemical and structural evolution of circumstellar material. We perform a detailed empirical…
H Fluorescence in M Dwarf Systems: A Stellar Origin
Nicholas Kruczek, Kevin France, William Evonosky +7
Observations of molecular hydrogen (H) fluorescence are a potentially useful tool for measuring the H abundance in exoplanet atmospheres. This emission was previously obser…
The Evolution of Inner Disk Gas in Transition Disks
Keri Hoadley, Kevin France, Richard D Alexander +2
Investigating the molecular gas in the inner regions of protoplanetary disks provides insight into how the molecular disk environment changes during the transition from primordial…