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Is Ursa Major II the Progenitor of the Orphan Stream?
M. Fellhauer, N. W. Evans, V. Belokurov +9
Prominent in the `Field of Streams' -- the Sloan Digital Sky Survey map of substructure in the Galactic halo -- is an `Orphan Stream' without obvious progenitor. In this numerical…
The Monitor project: Data processing and lightcurve production
Jonathan Irwin, Mike Irwin, Suzanne Aigrain +3
We have begun a large-scale photometric survey of nearby open clusters and star-forming regions, the Monitor project, aiming to measure time-series photometry for >10,000 cluster m…
Probing the Nature of the G1 Clump Stellar Overdensity in the Outskirts of M31
Daniel Faria, Rachel A. Johnson, Annette M. N. Ferguson +5
We present deep HST/ACS observations of the G1 clump, a distinct stellar overdensity lying at ~30 kpc along the south-western major axis of M31 close to the G1 globular cluster (Fe…
The Monitor project: Searching for occultations in young open clusters
Suzanne Aigrain, Simon Hodgkin, Jonathan Irwin +5
The Monitor project is a photometric monitoring survey of nine young (1-200Myr) clusters in the solar neighbourhood to search for eclipses by very low mass stars and brown dwarfs a…
An Observational Limit on the Dwarf Galaxy Population of the Local Group
Alan B. Whiting, George K. T. Hau, Mike Irwin +1
We present the results of an all-sky, deep optical survey for faint Local Group dwarf galaxies. Candidate objects were selected from the second Palomar survey (POSS-II) and ESO/SRC…
Optical spectroscopy of high proper motion stars: new M dwarfs within 10 pc and the closest pair of subdwarfs
C. Reyle, R. -D. Scholz, M. Schultheis +2
We present spectra of 59 nearby stars candidates, M dwarfs and white dwarfs, previously identified using high proper motion catalogues and the DENIS database. We review the existin…