Search Results - "Zinn, Robert"

Spectroscopy of QUEST RR Lyrae Variables: The New Virgo Stellar Stream by Duffau, Sonia, Zinn, Robert, Vivas, A. Katherina, Carraro, Giovanni, Méndez, René A, Winnick, Rebeccah, Gallart, Carme

Get full text

METALLICITY EVOLUTION OF THE SIX MOST LUMINOUS M31 DWARF SATELLITES by Ho, Nhung, Geha, Marla, Tollerud, Erik J, Zinn, Robert, Guhathakurta, Puragra, Vargas, Luis C

“…We present global metallicity properties, metallicity distribution functions (MDFs), and radial metallicity profiles for the six most luminous M31 dwarf galaxy…”
Get full text

DISENTANGLING THE VIRGO OVERDENSITY WITH RR LYRAE STARS by Vivas, A. Katherina, Zinn, Robert, Farmer, John, Duffau, Sonia, Ping, Yiding

“…ABSTRACT We use a combination of spatial distribution and radial velocity to search for halo substructures in a sample of 412 RR Lyrae stars (RRLSs) that…”
Get full text

THE QUEST-La SILLA AGN VARIABILITY SURVEY by Cartier, Régis, Lira, Paulina, Coppi, Paolo, Sánchez, Paula, Arévalo, Patricia, Bauer, Franz E., Rabinowitz, David, Zinn, Robert, Muñoz, Ricardo R., Meza, Nicolás

“…ABSTRACT We present the characterization and initial results from the QUEST-La Silla active galactic nucleus (AGN) variability survey. This is an effort to…”
Get full text

Surface Brightness and Stellar Populations at the Outer Edge of the Large Magellanic Cloud: No Stellar Halo Yet by Gallart, Carme, Stetson, Peter B, Hardy, Eduardo, Pont, Frederic, Zinn, Robert

Get full text

A Search for Intergalactic Globular Clusters in the Local Group by Zinn, Graziella di Tullio, Zinn, Robert

“…The whole Sloan Digital Sky Survey (SDSS, 14,555 deg^2 has been searched for intergalactic globular clusters (IGCs) in the Local Group (LG). Using optical,…”
Get full text

THE ADVANCED EVOLUTION OF GLOBULAR CLUSTER STARS by ZINN, ROBERT JAMES

Get full text

Disentangling the Virgo Overdensity with RR Lyrae stars by Vivas, A. Katherina, Zinn, Robert, Farmer, John, Duffau, Sonia, Ping, Yiding

“…We use a combination of spatial distribution and radial velocity to search for halo sub-structures in a sample of 412 RR Lyrae stars (RRLS) that covers a $\sim…”
Get full text

More Remote Globular Clusters in the Outer Halo of M31 by Zinn, Graziella di Tullio, Zinn, Robert

“…We searched the Sloan Digital Sky Survey for outer halo globular clusters (GCs) around M31. Our search of non-stellar objects, within the limits 0.3 < (g-i)o <…”
Get full text

A comprehensive view of the Virgo Stellar Stream by Duffau, Sonia, Vivas, A. Katherina, Zinn, Robert, Méndez, René, Ruiz, María Teresa

“…Radial velocities and metallicities have been measured for 82 RR Lyrae identified by the QUEST survey in the direction of the Virgo constellation. Distributed…”
Get full text

The QUEST-La Silla AGN Variability Survey by Cartier, Régis, Lira, Paulina, Coppi, Paolo, Sánchez, Paula, Arévalo, Patricia, Bauer, Franz E, Rabinowitz, David, Zinn, Robert, Muñoz, Ricardo R, Meza, Nicolás

“…We present the characterization and initial results from the QUEST-La Silla AGN variability survey. This is an effort to obtain well sampled optical light…”
Get full text

The QUEST RR Lyrae Survey II: The Halo Overdensities in the First Catalog by Vivas, A. Katherina, Zinn, Robert

“…Astron.J.132:714-728,2006 The first catalog of the RR Lyrae stars (RRLS) in the Galactic halo by the QUEST Survey has been searched for significant…”
Get full text

La Silla-QUEST Variability Survey in the Southern Hemisphere by Hadjiyska, Ellie, Rabinowitz, David, Baltay, Charles, Ellman, Nancy, Nugent, Peter, Zinn, Robert, Horowitz, Benjamin, McKinnon, Ryan, Miller, Lissa R

“…New Horizons in Time-Domain Astronomy, Proceedings of the International Astronomical Union, IAU Symposium, Volume 285, 2011, p. 324-326 We describe the La…”
Get full text

Whiting 1: the youngest globular cluster associated with the Sgr dSph by Carraro, Giovanni, Zinn, Robert, Bidin, Christian Moni

“…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…”
Get full text

The QUEST RR Lyrae Survey: III. The Low Galactic Latitude Catalogue by Mateu, Cecilia, Vivas, A. Katherina, Downes, Juan José, Briceño, César, Zinn, Robert, Cruz-Diaz, Gustavo

“…We present results for the QUEST RR Lyrae Survey at low galactic latitude, conducted entirely with observations obtained with the QUEST mosaic camera and the…”
Get full text

RR Lyrae Stars in the Halo: Tracers of Streams of Debris of Disrupted Galaxies by Vivas, A. Katherina, Zinn, Robert

“…We discuss the first part of a survey for RR Lyrae variables in the galactic halo that is being made with the 1m Schmidt telescope at the Venezuelan National…”
Get full text

The Chemical Enrichment History of the Large Magellanic Cloud by Carrera, Ricardo, Gallart, Carme, Hardy, Eduardo, Aparicio, Antonio, Zinn, Robert

“…Ca II triplet spectroscopy has been used to derive stellar metallicities for individual stars in four LMC fields situated at galactocentric distances of…”
Get full text

VLT Spectroscopy of RR Lyrae Stars in the Sagittarius Tidal Stream by Vivas, A. Katherina, Zinn, Robert, Gallart, Carme

“…Sixteen RR Lyrae variables from the QUEST survey that lie in the leading arm of the tidal stream from the Sagittarius dSph galaxy have been observed…”
Get full text

The Infrared Ca II triplet as metallicity indicator by Carrera, Ricardo, Gallart, Carme, Pancino, Elena, Zinn, Robert

“…Astron.J.134:1298-1314,2007 From observations of almost 500 RGB stars in 29 Galactic open and globular clusters, we have investigated the behaviour of the…”
Get full text

Searching for RR Lyrae stars in the Canis Major Overdensity by Mateu, Cecilia, Vivas, A. Katherina, Zinn, Robert, Miller, Lissa, .

“…The Canis Major overdensity (CMa) was initially proposed to be the remnant of a tidally disrupting dSph galaxy. Since its nature is still subject of debate,…”
Get full text