374 citations · 973 across the 15 of their papers we have counts for
15 papers
Asymmetric Drift in the Andromeda Galaxy (M31) as a Function of Stellar Age
Amanda C. N. Quirk, Puragra Guhathakurta, Laurent Chemin +5
We analyze the kinematics of Andromeda's disk as a function of stellar age by using photometry from the Panchromatic Hubble Andromeda Treasury (PHAT) survey and spectroscopy from t…
Emission-line stars in M31 from the SPLASH and PHAT surveys
Laura J. Prichard, Puragra Guhathakurta, Katherine M. Hamren +7
We present a sample of 224 stars that emit H (H stars) in the Andromeda galaxy (M31). The stars were selected from 5000 spectra, collected as part of the Spectroscopic…
Recent Results from SPLASH: Chemical Abundances and Kinematics of Andromeda's Stellar Halo
Karoline M. Gilbert, Rachael L. Beaton, Claire Dorman +1
Large scale surveys of Andromeda's resolved stellar populations have revolutionized our view of this galaxy over the past decade. The combination of large-scale, contiguous photome…
Isotropic at the Break? 3D Kinematics of Milky Way Halo Stars in the Foreground of M31
Emily C. Cunningham, Alis J. Deason, Puragra Guhathakurta +6
We present the line-of-sight (LOS) velocities for 13 distant main sequence Milky Way halo stars with published proper motions. The proper motions were measured using long baseline…
A Spectroscopic and Photometric Exploration of the C/M Ratio in the Disk of M31
Katherine M. Hamren, Constance M. Rockosi, Puragra Guhathakurta +12
We explore the ratio (C/M) of carbon-rich to oxygen-rich thermally pulsing asymptotic giant branch(TP-AGB) stars in the disk of M31 using a combination of moderate-resolution optic…
A clear age-velocity dispersion correlation in Andromeda's stellar disk
Claire E. Dorman, Puragra Guhathakurta, Anil C. Seth +9
The stellar kinematics of galactic disks are key to constraining disk formation and evolution processes. In this paper, for the first time, we measure the stellar age-velocity disp…
Tracing the Metal-Poor M31 Stellar Halo with Blue Horizontal Branch Stars
Benjamin F. Williams, Julianne J. Dalcanton, Eric F. BellKaroline M. Gilbert +7
We have analyzed new HST/ACS and HST/WFC3 imaging in F475W and F814W of two previously-unobserved fields along the M31 minor axis to confirm our previous constraints on the shape o…
TriAnd and its Siblings: Satellites of Satellites in the Milky Way Halo
A. J. Deason, V. Belokurov, K. M. Hamren +7
We explore the Triangulum-Andromeda (TriAnd) overdensity in the SPLASH (Spectroscopic and Photometric Landscape of Andromeda's Stellar Halo) and SEGUE (the Sloan Extension for Gala…
A New Approach to Detailed Structural Decomposition: Kicked-up Disk Stars in Andromeda's Halo?
Claire E. Dorman, Lawrence M. Widrow, Puragra Guhathakurta +1
We characterize the bulge, disk, and halo subcomponents in the Andromeda galaxy (M31) over the radial range 0.4 < R < 225 kpc. The cospatial nature of these subcomponents renders t…
A New Approach to Detailed Structural Decomposition from the SPLASH and PHAT Surveys: Kicked-up Disk Stars in the Andromeda Galaxy?
Claire E. Dorman, Lawrence M. Widrow, Puragra Guhathakurta +7
We characterize the bulge, disk, and halo subcomponents in the Andromeda galaxy (M31) over the radial range 4 < R_proj < 225 kpc. The cospatial nature of these subcomponents render…
Is there a metallicity ceiling to form carbon stars? - A novel technique reveals a scarcity of C stars in the inner M31 disk
M. L. Boyer, L. Girardi, P. Marigo +10
We use medium-band near-infrared (NIR) Hubble Space Telescope WFC3 photometry with model NIR spectra of Asymptotic Giant Branch (AGB) stars to develop a new tool for efficiently di…
The Panchromatic Hubble Andromeda Treasury I: Bright UV Stars in the Bulge of M31
Philip Rosenfield, L. Clifton Johnson, Léo Girardi +20
As part of the Panchromatic Hubble Andromeda Treasury (PHAT) multi-cycle program, we observed a 12' \times 6.5' area of the bulge of M31 with the WFC3/UVIS filters F275W and F336W.…
The SPLASH Survey: Kinematics of Andromeda's Inner Spheroid
Claire E. Dorman, Puragra Guhathakurta, Mark A. Fardal +12
The combination of large size, high stellar density, high metallicity, and Sersic surface brightness profile of the spheroidal component of the Andromeda galaxy (M31) within R_proj…
The Panchromatic Hubble Andromeda Treasury
J. J. Dalcanton, B. F. Williams, D. Lang +30
The Panchromatic Hubble Andromeda Treasury (PHAT) is an on-going HST Multicycle Treasury program to image ~1/3 of M31's star forming disk in 6 filters, from the UV to the NIR. The…
The SPLASH Survey: Spectroscopy of 15 M31 Dwarf Spheroidal Satellite Galaxies
Erik J. Tollerud, Rachael L. Beaton, Marla C. Geha +13
We present a resolved-star spectroscopic survey of 15 dwarf spheroidal (dSph) satellites of the Andromeda Galaxy (M31) as part of the Spectroscopic and Photometric Landscape of And…