646 citations · 15.1k across the 142 of their papers we have counts for
5 papers · 2 filters
Ultra-Deep Hubble Space Telescope Imaging of the Small Magellanic Cloud: The Initial Mass Function of Stars with M <~ 1 Msun
Jason S. Kalirai, Jay Anderson, Aaron Dotter +7
We present a new measurement of the stellar initial mass function (IMF) based on ultra-deep, high-resolution photometry of >5,000 stars in the outskirts of the Small Magellanic Clo…
A double cluster at the core of 30 Doradus
E. Sabbi, D. J. Lennon, M. Gieles +6
Based on an analysis of data obtained with the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) we report the identification of two distinct stellar populations in th…
The M31 Velocity Vector. III. Future Milky Way-M31-M33 Orbital Evolution, Merging, and Fate of the Sun
Roeland P. van der Marel, Gurtina Besla, T. J. Cox +2
We study the future orbital evolution and merging of the MW-M31-M33 system, using a combination of collisionless N-body simulations and semi-analytic orbit integrations. Monte-Carl…
The M31 Velocity Vector. II. Radial Orbit Towards the Milky Way and Implied Local Group Mass
Roeland P. van der Marel, Mark Fardal, Gurtina Besla +5
We determine the velocity vector of M31 with respect to the Milky Way and use this to constrain the mass of the Local Group, based on HST proper-motion measurements presented in Pa…
The M31 Velocity Vector. I. Hubble Space Telescope Proper Motion Measurements
Sangmo Tony Sohn, Jay Anderson, Roeland P. van der Marel
We present the first proper motion measurements for the galaxy M31. We obtained new V-band imaging data with the HST ACS/WFC and WFC3/UVIS of a spheroid field near the minor axis,…