Steve Majewski - U Virginia

Steve Majewski
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Steve Majewski
U Virginia
United States

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Astrophysics of Galaxies (6)
Solar and Stellar Astrophysics (5)
Cosmology and Nongalactic Astrophysics (3)
Astrophysics (2)
Instrumentation and Methods for Astrophysics (2)
Earth and Planetary Astrophysics (1)

Publications Authored By Steve Majewski

Affiliations: 1Department of Astronomy, University of Florida, 2Department of Astronomy, University of Florida, 3Western Washington University, 4University of Oxford, 5Yale, 6Department of Astronomy, University of Florida, 7Leiden Observatory, 8Steward Observatory, 9University of Michigan, 10University of Michigan, 11Vanderbilt University, 12University of Virginia, 13Wesleyan University, 14University of Virginia, 15University of Virginia, 16University of Virginia

The kinematics and dynamics of young stellar populations tests theories of their formation. With this aim, we continue our analysis of the SDSS-III/APOGEE INfrared Spectra of Young Nebulous Clusters (IN-SYNC) survey, a high resolution near infrared spectroscopic survey of young clusters. We focus on the Orion A star-forming region, for which IN-SYNC obtained spectra of ~2700 stars. Read More

We present a proper motion measurement for the halo globular cluster Pyxis, using HST/ACS data as the first epoch, and GeMS/GSAOI Adaptive Optics data as the second, separated by a baseline of about 5 years. This is both the first measurement of the proper motion of Pyxis and the first calibration and use of Multi-Conjugate Adaptive Optics data to measure an absolute proper motion for a faint, distant halo object. Consequently, we present our analysis of the Adaptive Optics data in detail. Read More

NGC 2420 is a $\sim$2 Gyr-old well-populated open cluster that lies about 2 kpc beyond the solar circle, in the general direction of the Galactic anti-center. Most previous abundance studies have found this cluster to be mildly metal-poor, but with a large scatter in the obtained metallicities for this open cluster. Detailed chemical abundance distributions are derived for 12 red-giant members of NGC 2420 via a manual abundance analysis of high-resolution (R = 22,500) near-infrared ($\lambda$1. Read More

We present in this study a first analysis of the astrometric error budget of absolute astrometry relative to background galaxies using adaptive optics. We use for this analysis multi-conjugated adaptive optics (MCAO) images obtained with GeMS/GSAOI at Gemini South. We find that it is possible to obtain 0. Read More

Affiliations: 1Department of Astronomy, University of Florida, 2Department of Astronomy, University of Florida, 3Western Washington University, 4University of Oxford, 5Yale, 6Department of Astronomy, University of Florida, 7Leiden Observatory, 8Steward Observatory, 9ETH Zurich, 10University of Michigan, 11Vanderbilt University, 12University of Virginia, 13Wesleyan University, 14University of Virginia, 15University of Virginia, 16University of Virginia, 17Apache Point Observatory and New Mexico State University

We present the results of the SDSS APOGEE INfrared Spectroscopy of Young Nebulous Clusters program (IN-SYNC) survey of the Orion A molecular cloud. This survey obtained high resolution near infrared (NIR) spectroscopy of about 2700 young pre-main sequence stars throughout the region, acquired across five distinct fields spanning 6deg field of view (FOV). With these spectra, we have measured accurate stellar parameters (T_eff, log g, v sin i) and extinctions, and placed the sources in the Hertzsprung-Russel Diagram (HRD). Read More

Most field stars will have encountered the highest stellar density and hence the largest number of interactions in their birth environment. Yet the stellar dynamics during this crucial phase are poorly understood. Here we analyze the radial velocities measured for 152 out of 380 observed stars in the 2-6 Myr old star cluster IC 348 as part of the SDSS-III APOGEE. Read More

The Kepler mission has yielded a large number of planet candidates from among the Kepler Objects of Interest (KOIs), but spectroscopic follow-up of these relatively faint stars is a serious bottleneck in confirming and characterizing these systems. We present motivation and survey design for an ongoing project with the SDSS-III multiplexed APOGEE near-infrared spectrograph to monitor hundreds of KOI host stars. We report some of our first results using representative targets from our sample, which include current planet candidates that we find to be false positives, as well as candidates listed as false positives that we do not find to be spectroscopic binaries. Read More

Authors: Caty Pilachowski1, Carles Badenes2, Stephen Bailey3, Aaron Barth4, Rachel Beaton5, Eric Bell6, Rebecca Bernstein7, Fuyan Bian8, Michael Blanton9, Robert Blum10, Adam Bolton11, Howard Bond12, Mark Brodwin13, James Bullock14, Jeff Carlin15, Ranga-Ram Chary16, David Cinabro17, Michael Cooper18, Jorge L. C. Cota19, Marc Davis20, Kyle Dawson21, Arjun Dey22, Megan Donahue23, Jeremy Drake24, Erica Ellingson25, Lorenzo Faccioli26, Xiaohui Fan27, Harry Ferguson28, Eric Gawiser29, Marla Geha30, Mauro Giavalisco31, Anthony Gonzalez32, Kim Griest33, Bruce Grossan34, Raja Guhathakurta35, Paul Harding36, Sara R. Heap37, Shirley Ho38, Steve Howell39, Buell Jannuzi40, Jason Kalirai41, Brian Keeney42, Lisa Kewley43, Xu Kong44, Michael Lampton45, Wei-Peng Lin46, Axel de la Macorra47, Lucas Macri48, Steve Majewski49, Paul Martini50, Phil Massey51, Virginia McSwain52, Adam A. Miller53, Dante Minniti54, Maryam Modjaz55, Heather Morrison56, John Moustakas57, Adam Myers58, Joan Najita59, Jeffrey Newman60, Dara Norman61, Knut Olsen62, Michael Pierce63, Alexandra Pope64, Moire Prescott65, Naveen Reddy66, Kevin Reil67, Armin Rest68, Katherine Rhode69, Connie Rockosi70, Greg Rudnick71, Abhijit Saha72, John Salzer73, David Sanders74, David Schlegel75, Branimir Sesar76, Joseph Shields77, Jeffrey Silverman78, Josh Simon79, Adam Stanford80, Daniel Stern81, Lisa Storrie-Lombardi82, Nicholas Suntzeff83, Jason Surace84, Alex Szalay85, Melville Ulmer86, Ben Weiner87, Beth Willman88, Rogier Windhorst89, Michael Wood-Vasey90
Affiliations: 1Indiana U, 2U of Pittsburgh, 3LBNL, 4UC Irvine, 5U of Virginia, 6U of Michigan, 7UC Santa Cruz, 8U of Arizona, 9NYU, 10NOAO, 11U Utah, 12STScI, 13U of Missouri, 14UC Irvine, 15RPI, 16Caltech/IPAC, 17Wayne State, 18UC Irvine, 19ININ, Mexico, 20UC Berkeley, 21U of Utah, 22NOAO, 23MSU, 24CfA, 25U Colorado, 26Kavli/Peking, 27U of Arizona, 28STScI, 29Rutgers, 30Yale U, 31U Mass, 32U Florida, 33UC San Diego, 34LBNL, 35UC Santa Cruz, 36CWRU, 37NASA/GSFC, 38Carnegie-Mellon, 39NASA/Ames, 40Steward Observatory, 41STScI, 42U Colorado, 43U. Hawaii, 44USTC, 45LBNL, 46SAO, 47UNAM/IAC, 48Texas A&M, 49U Virginia, 50OSU, 51Lowell Obs, 52Lehigh U, 53UC Berkeley, 54P U Catolica, 55NYU, 56CWRU, 57Siena College, 58U of Wyoming, 59NOAO, 60U Pittsburgh, 61NOAO, 62NOAO, 63U Wyoming, 64U Mass, 65UC Santa Barbara, 66UC Riverside, 67SLAC, 68STScI, 69Indiana U, 70UC Santa Cruz, 71Kansas U, 72NOAO, 73Indiana U, 74U Hawaii, 75LBNL, 76Caltech, 77Ohio U, 78IPMU, 79OCIW, 80UC Davis, 81JPL, 82Caltech/IPAC, 83Texas A&M, 84Caltech/IPAC, 85JHU, 86Northwestern, 87U Arizona, 88Haverford, 89ASU, 90U Pittsburgh

This document summarizes the results of a community-based discussion of the potential science impact of the Mayall+BigBOSS highly multiplexed multi-object spectroscopic capability. The KPNO Mayall 4m telescope equipped with the DOE- and internationally-funded BigBOSS spectrograph offers one of the most cost-efficient ways of accomplishing many of the pressing scientific goals identified for this decade by the "New Worlds, New Horizons" report. The BigBOSS Key Project will place unprecedented constraints on cosmological parameters related to the expansion history of the universe. Read More

We present kinematical profiles and metallicity for the M31 dwarf spheroidal (dSph) satellite galaxy Andromeda II (And II) based on Keck DEIMOS spectroscopy of 531 red giant branch stars. Our kinematical sample is among the largest for any M31 satellite and extends out to two effective radii (r_eff = 5.3' = 1. Read More

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 Andromeda's Stellar Halo (SPLASH) project. We filter foreground contamination from Milky Way (MW) stars, noting that MW substructure is evident in this contaminant sample. We also filter M31 halo field giant stars, and identify the remainder as probable dSph members. Read More

Affiliations: 1ESO-Santiago, 2Concepcion, 3Padova, 4UWisconsin, 5UVirginia
Category: Astrophysics

The outer parts of the Milky Way disk are believed to be one of the main arenas where the accretion of external material in the form of dwarf galaxies and subsequent formation of streams is taking place. The Monoceros stream and the Canis Major and Argo over-densities are notorious examples. VLT high resolution spectra have been acquired for five distant open clusters. Read More

We have measured the absolute proper motion of the Fornax dwarf spheroidal galaxy from a combination of photographic plate material and HST WFPC2 data that provide a time baseline of up to 50 years. The extragalactic reference frame consists of 8 QSO images and 48 galaxies. The absolute proper motion is mu_alpha cos(delta) = 0. Read More