The Metal-poor Halo of the Andromeda Spiral Galaxy (M31)

@article{Kalirai2006TheMH,
  title={The Metal-poor Halo of the Andromeda Spiral Galaxy (M31)},
  author={Jason S. Kalirai and Karoline M. Gilbert and Puragra Guhathakurta and Steven R. Majewski and James C. Ostheimer and Robert Michael Rich and Michael C. Cooper and David Brian Reitzel and Richard J. Patterson},
  journal={The Astrophysical Journal},
  year={2006},
  volume={648},
  pages={389 - 404}
}
We present spectroscopic observations of red giant branch (RGB) stars over a large expanse in the halo of the Andromeda spiral galaxy (M31), acquired with the DEIMOS instrument on the Keck II 10 m telescope. Using a combination of five photometric/spectroscopic diagnostics—(1) radial velocity, (2) intermediate-width DDO51 photometry, (3) Na I equivalent width (surface gravity-sensitive), (4) position in the color-magnitude diagram, and (5) comparison between photometric and spectroscopic [Fe/H… 
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References

SHOWING 1-10 OF 40 REFERENCES
Photometry and the Metallicity Distribution of the Outer Halo of M31. II. The 30 Kiloparsec Field
We present the results of a wide-field (VI) photometric study of the red giant branch (RGB) stars in the outer halo of M31, in a field located 30–35 kpc from the center of the galaxy along the
Metallicity and Kinematics of M31’s Outer Stellar Halo from a Keck Spectroscopic Survey
We present first results from a spectroscopic survey designed to examine the metallicity and kinematics of individual red giant branch stars in the outer halo of the Andromeda spiral galaxy (M31).
Faint Surface Photometry of the Halo of M31
We have obtained counts of stars near the tip of the red giant branch of M31, and have used these counts to estimate the surface brightness of the halo of M31 down to a level of μ v ≃ 30 mag arcsec−2
Kinematics and Metallicity of M31 Red Giants: The Giant Southern Stream and Discovery of a Second Cold Component at R = 20 kpc
We present spectroscopic observations of red giant branch (RGB) stars in the Andromeda spiral galaxy (M31), acquired with the DEIMOS instrument on the Keck II 10 m telescope. The three fields
The Andromeda project - I. Deep HST-WFPC2 V, I photometry of 16 fields toward the disk and the halo of the M 31 galaxy. Probing the stellar content and metallicity distribution
We have obtained HST-WFPC2 F555W and F814W photometry for 16 fields in the vicinity of the luminous nearby spiral galaxy M 31, sampling the stellar content of the disk and the halo at different
Isolating Red Giant Stars in M31's Elusive Outer Spheroid
Deep UBRI images of a 15′ × 15′ field in the outer spheroid of the galaxy M31 obtained using the Kitt Peak National Observatory's 4 m telescope and I-band images obtained with the Keck 10 m telescope
On the Accretion Origin of a Vast Extended Stellar Disk around the Andromeda Galaxy
We present the discovery of an inhomogenous, low surface brightness, extended disklike structure around the Andromeda galaxy (M31) based on a large kinematic survey of more than 2800 stars with the
Dynamics and Stellar Content of the Giant Southern Stream in M31. I. Keck Spectroscopy of Red Giant Stars
This paper presents the first results from a large spectroscopic survey of red giant branch (RGB) stars in M31 using DEIMOS on the Keck 10 m telescope. A photometric prescreening method, based on the
Mapping the Galactic Halo. VI. Spectroscopic Measures of Luminosity and Metallicity
We present our calibration of spectroscopic measures of luminosity and metallicity for halo giant candidates and give metallicities and distances for our first sample of spectroscopically confirmed
Taking measure of the Andromeda halo: A Kinematic analysis of the giant stream surrounding M31
We present a spectroscopic survey of the giant stellar stream found in the halo of the Andromeda galaxy. Taken with the DEIMOS multi-object spectrograph on the Keck2 telescope, these data display a
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