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22 papers · 2 filters
Repeating periodic eruptions of the supernova impostor SN 2000ch
Mojgan Aghakhanloo, Nathan Smith, Peter Milne +7
We analyse photometric observations of the supernova (SN) impostor SN 2000ch in NGC 3432 covering the time since its discovery. This source was previously observed to have four out…
Ultracool dwarfs in Gaia DR3
L. M. Sarro, A. Berihuete, R. L. Smart +36
Aims. In this work we use the Gaia DR3 set of ultracool dwarf candidates and complement the Gaia spectrophotometry with additional photometry in order to characterise its global pr…
Discovery of a Mid-L Dwarf Companion to the L 262-74 System
Léopold Gramaize, Adam C. Schneider, Federico Marocco +9
We present the discovery of CWISE J151044.74524923.5, a wide low-mass companion to the nearby (24.7 pc) system L 262-74, which was identified through the Backyard Worlds:…
Time-Variable Jet Ejections from RW Aur A, RY Tau and DG Tau
Michihiro Takami, Hans Moritz Guenther, P. Christian Schneider +17
We present Gemini-NIFS, VLT-SINFONI and Keck-OSIRIS observations of near-infrared [Fe II] emission associated with the well-studied jets from three active T Tauri stars; RW Aur A,…
Nested Dust Shells around the Wolf-Rayet Binary WR 140 observed with JWST
Ryan M. Lau, Matthew J. Hankins, Yinuo Han +29
Massive colliding-wind binaries that host a Wolf-Rayet (WR) star present a potentially important source of dust and chemical enrichment in the interstellar medium (ISM). However, t…
A dense star in a 51-minute orbital period eclipsing binary
Kevin B. Burdge, Kareem El-Badry, Thomas R. Marsh +24
In over a thousand known cataclysmic variables (CVs), where a white dwarf is accreting from a hydrogen-rich star, only a dozen have orbital periods below 75 minutes. One way to ach…