SEGUE 3: AN OLD, EXTREMELY LOW LUMINOSITY STAR CLUSTER IN THE MILKY WAY's HALO

@article{Fadely2011SEGUE3A,
  title={SEGUE 3: AN OLD, EXTREMELY LOW LUMINOSITY STAR CLUSTER IN THE MILKY WAY's HALO},
  author={Ross Fadely and Beth Willman and Marla C. Geha and Shane Walsh and Ricardo R. Mu{\~n}oz and Helmut Jerjen and Luis C. Vargas and Gary S. Da Costa},
  journal={The Astronomical Journal},
  year={2011},
  volume={142}
}
We investigate the kinematic and photometric properties of the Segue 3 Milky Way companion using Keck/DEIMOS spectroscopy and Magellan/IMACS g- and r-band imaging. Using maximum likelihood methods to analyze the photometry, we study the structure and stellar population of Segue 3. We find that the half-light radius of Segue 3 is 26″ ± 5″ (2.1 ± 0.4 pc, for a distance of 17 kpc) and the absolute magnitude is a mere MV = 0.0 ± 0.8 mag, making Segue 3 the least luminous old stellar system known… 

A COMPLETE SPECTROSCOPIC SURVEY OF THE MILKY WAY SATELLITE SEGUE 1: THE DARKEST GALAXY

We present the results of a comprehensive Keck/DEIMOS spectroscopic survey of the ultra-faint Milky Way satellite galaxy Segue 1. We have obtained velocity measurements for 98.2% of the stars within

A Multiwavelength Study of the Segue 3 Cluster

We present new SDSS and Washington photometry of the young outer-halo stellar system Segue 3. Combined with archival VI-observations, our most consistent results yield , , , and , with a high binary

A NEW MILKY WAY HALO STAR CLUSTER IN THE SOUTHERN GALACTIC SKY

We report on the discovery of a new Milky Way (MW) companion stellar system located at . The discovery was made using the eighth data release of SDSS after applying an automated method to search for

Deep SOAR follow-up photometry of two Milky Way outer-halo companions discovered with Dark Energy Survey

We report the discovery of a new star cluster, DES 3, in the constellation of Indus, and deeper observations of the previously identified satellite DES J0222.7−5217 (Eridanus III). DES 3 was detected

Discovery of a faint outer halo Milky Way star cluster in the southern sky

We report the discovery of a new, low-luminosity star cluster in the outer halo of the Milky Way. High-quality gr photometry is presented, from which a color–magnitude diagram is constructed, and

SEGUE 2: THE LEAST MASSIVE GALAXY

Segue 2, discovered by Belokurov et al., is a galaxy with a luminosity of only 900 L☉. We present Keck/DEIMOS spectroscopy of 25 members of Segue 2—a threefold increase in spectroscopic sample size.

KIM 3: AN ULTRA-FAINT STAR CLUSTER IN THE CONSTELLATION OF CENTAURUS

We report the discovery of an ultra-faint star cluster in the constellation of Centaurus. This new stellar system, Kim 3, features a half-light radius of r h = 2.29 − 0.52 + 1.28 ?> pc and a total

EIGHT NEW MILKY WAY COMPANIONS DISCOVERED IN FIRST-YEAR DARK ENERGY SURVEY DATA

We report the discovery of eight new Milky Way companions in ∼ 1800 deg 2 ?> of optical imaging data collected during the first year of the Dark Energy Survey (DES). Each system is identified as a

A HERO'S LITTLE HORSE: DISCOVERY OF A DISSOLVING STAR CLUSTER IN PEGASUS

We report the discovery of an ultra-faint stellar system in the constellation of Pegasus. This concentration of stars was detected by applying our overdensity detection algorithm to the Sloan Digital

A SEARCH FOR RR LYRAE STARS IN SEGUE 2 AND SEGUE 3

We present an extensive search for RR Lyrae (RRL) stars in and around the ultra-faint Milky Way companions Segue 2 and Segue 3. The former (MV = −2.5) appears to be an extremely faint dwarf galaxy

References

SHOWING 1-10 OF 35 REFERENCES

A COMPLETE SPECTROSCOPIC SURVEY OF THE MILKY WAY SATELLITE SEGUE 1: THE DARKEST GALAXY

We present the results of a comprehensive Keck/DEIMOS spectroscopic survey of the ultra-faint Milky Way satellite galaxy Segue 1. We have obtained velocity measurements for 98.2% of the stars within

MAPPING THE STELLAR STRUCTURE OF THE MILKY WAY THICK DISK AND HALO USING SEGUE PHOTOMETRY

We map the stellar structure of the Galactic thick disk and halo by applying color–magnitude diagram (CMD) fitting to photometric data from the Sloan Extension for Galactic Understanding and

The Kinematics of the Ultra-faint Milky Way Satellites: Solving the Missing Satellite Problem

We present Keck DEIMOS spectroscopy of stars in eight of the newly discovered ultra-faint dwarf galaxies around the Milky Way. We measure the velocity dispersions of Canes Venatici I, Canes Venatici

The Discovery of Two Extremely Low Luminosity Milky Way Globular Clusters

We report the discovery of two extremely low luminosity globular clusters in the Milky Way halo. These objects were detected in the Sloan Digital Sky Survey Data Release 5 and confirmed with deeper

TURNING THE TIDES ON THE ULTRA-FAINT DWARF SPHEROIDAL GALAXIES: COMA BERENICES AND URSA MAJOR II

We present deep CFHT/MegaCam photometry of the ultra-faint Milky Way satellite galaxies: Coma Berenices (ComBer) and Ursa Major II (UMa II). These data extend to r ∼ 25, corresponding to 3 mag below

Boötes II ReBoöted: An MMT/MegaCam Study of an Ultrafaint Milky Way Satellite

We present MMT/Megacam imaging in Sloan g and r of the extremely low luminosity Boötes II Milky Way companion. We use a bootstrap approach to perform robust measurements of, and to calculate

THE GLOBULAR CLUSTER AM 4: YET ANOTHER YOUNG GLOBULAR ASSOCIATED WITH THE Sgr DWARF SPHEROIDAL GALAXY?

The complete census of globular clusters formerly belonging to the Sagittarius Dwarf Spheroidal (Sgr dSph) galaxy and now deposited into the Galactic halo is an important contribution to our

Uncovering Extremely Metal-Poor Stars in the Milky Way’s Ultrafaint Dwarf Spheroidal Satellite Galaxies

We present new metallicity measurements for 298 individual red giant branch stars in eight of the least luminous dwarf spheroidal galaxies (dSphs) in the Milky Way (MW) system. Our technique is based

A synthetic view on structure and evolution of the Milky Way

Since the Hipparcos mission and recent large scale surveys in the optical and the near-infrared, new constraints have been obtained on the structure and evolution history of the Milky Way. The

Whiting 1: the youngest globular cluster associated with the Sagittarius dwarf spheroidal galaxy ,,

Context. Recently, Carraro (2005) drew attention to the remarkable star cluster Whiting 1 by showing that it lies about 40 kpc from the Sun and is therefore unquestionably a member of the Galactic