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UV Spectropolarimetry with Polstar: Protoplanetary Disks
John P. Wisniewski, Andrei V. Berdyugin, Svetlana V. Berdyugina +13
Polstar is a proposed NASA MIDEX mission that would feature a high resolution UV spectropolarimeter capable of measure all four Stokes parameters onboard a 60cm telescope. The miss…
Gaia 20eae: A newly discovered episodically accreting young star
Arpan Ghosh, Saurabh Sharma, Joe. P. Ninan +18
The Gaia Alert System issued an alert on 2020 August 28, on Gaia 20eae when its light curve showed a 4.25 magnitude outburst. We present multi-wavelength photometric and spec…
Multiband imaging of the HD 36546 debris disk: a refined view from SCExAO/CHARIS
Kellen Lawson, Thayne Currie, John P. Wisniewski +21
We present the first multi-wavelength (near-infrared; ) imaging of HD 36546's debris disk, using the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) system co…
Ultraviolet Spectropolarimetry: on the origin of rapidly rotating B stars
C. E. Jones, J. Labadie-Bartz, D. V. Cotton +12
UV spectroscopy and spectropolarimetry hold the key to understanding certain aspects of massive stars that are largely inaccessible with optical or longer wavelength observations.…
The Warm Neptune GJ 3470b has a Polar Orbit
Gudmundur Stefansson, Suvrath Mahadevan, Cristobal Petrovich +34
The warm Neptune GJ 3470b transits a nearby (pc) bright slowly rotating M1.5-dwarf star. Using spectroscopic observations during two transits with the newly commissioned NEID…
Outbursts and stellar properties of the classical Be star HD 6226
Noel D. Richardson, Olivier Thizy, Jon E. Bjorkman +58
The bright and understudied classical Be star HD 6226 has exhibited multiple outbursts in the last several years during which the star grew a viscous decretion disk. We analyze 659…
High-contrast integral field spectropolarimetry of planet-forming disks with SCExAO/CHARIS
Kellen Lawson, Thayne Currie, John P. Wisniewski +10
We describe a new high-contrast imaging capability well suited for studying planet-forming disks: near-infrared (NIR) high-contrast spectropolarimetric imaging with the Subaru Coro…
A Search for Planetary Metastable Helium Absorption in the V1298 Tau System
Shreyas Vissapragada, Guðmundur Stefánsson, Michael Greklek-McKeon +28
Early in their lives, planets endure extreme amounts of ionizing radiation from their host stars. For planets with primordial hydrogen and helium-rich envelopes, this can lead to s…
TOI-532b: The Habitable-zone Planet Finder confirms a Large Super Neptune in the Neptune Desert orbiting a metal-rich M dwarf host
Shubham Kanodia, Gudmundur Stefansson, Caleb I. Canas +30
We confirm the planetary nature of TOI-532b, using a combination of precise near-infrared radial velocities with the Habitable-zone Planet Finder, TESS light curves, ground based p…
New Candidate Extreme T Subdwarfs from the Backyard Worlds: Planet 9 Citizen Science Project
Aaron M. Meisner, Adam C. Schneider, Adam J. Burgasser +29
Schneider et al. (2020) presented the discovery of WISEA J041451.67-585456.7 and WISEA J181006.18-101000.5, which appear to be the first examples of extreme T-type subdwarfs (esdTs…
Variability of Disk Emission in Pre-Main Sequence and related Stars. V. Occultation Events from the innermost disk region of the Herbig Ae Star HD 163296
Monika Pikhartova, Zachary C. Long, Korash D. Assani +8
HD 163296 is a Herbig Ae star that underwent a dramatic 0.8 magnitude drop in brightness in the V photometric band in 2001 and a brightening in the near-IR in 2002. Because t…