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A systematic search for outbursting AM CVn systems with the Zwicky Transient Facility
Jan van Roestel, Leah Creter, Thomas Kupfer +15
AM CVn systems are a rare type of accreting binary that consists of a white dwarf and a helium-rich, degenerate donor star. Using the Zwicky Transient Facility (ZTF), we searched f…
The nature of the Eastern Extent in the outer halo of M31
Janet Preston, Michelle Collins, R. Michael Rich +3
We present the first comprehensive spectroscopic study of the Andromeda galaxy's Eastern Extent. This ~4 degree long filamentary structure. located 70-90 kpc from the centre of M31…
Infrared variable stars in the compact elliptical galaxy M32
O. C. Jones, C. Nally, M. J. Sharp +7
Variable stars in the compact elliptical galaxy M32 are identified, using three epochs of photometry from the Spitzer Space Telescope at 3.6 and 4.5 m, separated by 32 to 381 da…
Quantified diffuse light in compact groups of galaxies
Denis Poliakov, Aleksandr V. Mosenkov, Noah Brosch +2
The vast majority of stars in galaxy groups are contained within their constituent galaxies. Some small fraction of stars is expected, however, to follow the global dark matter pot…
Andromeda XXI -- a dwarf galaxy in a low density dark matter halo
Michelle L. M. Collins, Justin I. Read, Rodrigo A. Ibata +6
Andromeda XXI (And XXI) has been proposed as a dwarf spheroidal galaxy with a central dark matter density that is lower than expected in the Standard Cold Dark Matter (CDM)…
A Photometric and Kinematic Analysis of UDG1137+16 (dw1137+16): Probing Ultra-Diffuse Galaxy Formation in a Group Environment
Jonah S. Gannon, Bililign T. Dullo, Duncan A. Forbes +6
The dominant physical formation mechanism(s) for ultra-diffuse galaxies (UDGs) is still poorly understood. Here, we combine new, deep imaging from the Jeanne Rich Telescope with de…