A5010297975- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Career Development and Diversity
- Health and Medical Research Impacts
- Science Education and Perceptions
- Scientific Research and Discoveries
- Diverse Educational Innovations Studies
- Astrophysics and Star Formation Studies
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Science Education and Pedagogy
- Technology Assessment and Management
- History and Developments in Astronomy
- Innovative Teaching Methods
- Health disparities and outcomes
- Geriatric Care and Nursing Homes
- Climate Change Communication and Perception
- Diabetes, Cardiovascular Risks, and Lipoproteins
- Educational Games and Gamification
- Physical Education and Pedagogy
- Rural development and sustainability
- Agriculture and Rural Development Research
- Space Exploration and Technology
American Physical Society
2023
Arizona State University
2020-2021
University of Arizona
2018-2019
Eden Medical Center
2018
University of Virginia
2012-2015
American Association of Physics Teachers
2015
University of Pittsburgh
1995
We measure the Milky Way's rotation curve over Galactocentric range 4 kpc ≲ R 14 from first year of data Apache Point Observatory Galactic Evolution Experiment. model line-of-sight velocities 3365 stars in fields with b = 0° between 30° ⩽ l 210° out to distances 10 using an axisymmetric kinematical that includes a correction for asymmetric drift warm tracer population (σR ≈ 35 km s−1). determine local value circular velocity be Vc(R0) 218 ± 6 s−1 and find is approximately flat derivative...
The Apache Point Observatory Galactic Evolution Experiment (APOGEE) is a high-resolution infrared spectroscopic survey spanning all environments (i.e., bulge, disk, and halo), with the principal goal of constraining dynamical chemical evolution models Milky Way. APOGEE takes advantage reduced effects extinction at wavelengths to observe inner Galaxy bulge an unprecedented level detail. survey's broad spatial wavelength coverage enables users data address numerous structure stellar...
We present the Massive and Distant Clusters of WISE Survey (MaDCoWS), a search for galaxy clusters at 0.7<z<1.5 based upon data from Wide-field Infrared Explorer (WISE) mission. MaDCoWS is first cluster survey capable discovering massive these redshifts over full extragalactic sky. The divided into two regions -- region sky covered by Pan-STARRS (Dec>-30 degrees) remainder southern Dec<-30 degrees which shallower optical SuperCOSMOS Sky are available. In this paper we describe algorithm,...
Because noninstitutionalized senior citizens comprise over 95% of the population 65 years age and older, their health needs are a major concern. Data regarding infections in this including epidemiology, morbidity, mortality lacking. The authors recruited study 417 free-living persons, all or from two neighborhoods Pittsburgh, Pennsylvania. After collection self-reported baseline information these they were monitored for clinical 2 years, beginning July 1986 through June 1988, using clinic...
The largest clusters of galaxies in the Universe contain vast amounts dark matter, plus baryonic matter two principal phases, a majority hot gas component and minority cold stellar phase comprising stars, compact objects, low-temperature gas. Hydrodynamic simulations indicate that highest-mass systems retain cosmic fraction baryons, natural consequence which is anti-correlation between masses stars within halos fixed total mass. We report observational detection this based on 4 elements...
We present a simultaneous analysis of galaxy cluster scaling relations between weak-lensing mass and multiple observables, across wide range wavelengths, that probe both gas stellar content. Our new hierarchical Bayesian model simultaneously considers the selection variable alongside all other observables in order to explicitly intrinsic property covariance account for effects. apply this method sample 41 clusters at $0.15<z<0.30$, with well-defined criteria based on RASS X-ray luminosity,...
Abstract Outbursts from active galactic nuclei (AGN) can inflate cavities in the intracluster medium (ICM) of galaxy clusters and are believed to play primary role offsetting radiative cooling ICM. However, details how energy AGN feedback thermalizes heat ICM is not well understood, partly due unknown composition energetics cavities. The Sunyaev–Zel’dovich (SZ) effect, a measure integrated pressure along line sight, provides means measuring thermal contents cavities, discriminate between...
We present the North Galactic Cap sample of Extremely Luminous Quasar Survey (ELQS-N), which targets quasars with $M_{1450}<-27$ at $2.8 \leq z < 5$ in an area $\sim7600\,\rm{deg}^2$ Sloan Digital Sky (SDSS) footprint $90\text{\textdegree}<\rm{RA}<270\text{\textdegree}$. Based on a near-infrared/infrared \textit{JKW2} color cut, ELQS selection efficiently uses random forest methods to classify and estimate photometric redshifts; this scheme overcomes some difficulties pure optical quasar...
The correlation between fresh gas accretion onto haloes and galaxy star formation is critical to understanding formation. Different theoretical models have predicted different strengths halo rates rates, ranging from strong positive correlations little or no correlation. Here, we present a technique observationally measure this strength for isolated Milky Way-mass galaxies with $z < 0.123$. This based on dark matter the projected density profile of neighbouring galaxies; these also underlie...
Initiatives to increase the number, persistence, and success of women in physics United States reach preteen girls through senior women. Programs exist at both local national levels. In addition, researchers have investigated issues related gender equity education. Anecdotal evidence suggests increased media coverage underrepresentation science. All these efforts are motivated made more effective by continued collection presentation data on presence, promise physics.
Abstract We present the results from a pilot study with Karl G. Jansky Very Large Array to determine radio morphologies of extended sources and properties their host-galaxies in 10 massive galaxy clusters at z ∼ 1, an epoch which are assembling rapidly. These drawn parent sample WISE -selected that were cross-correlated VLA Faint Images Radio Sky Twenty-Centimeters survey identify within 1′ cluster centers. Out targeted sources, 6 FR II 1 is I source, 3 have undetermined morphologies. Eight...
We present measurements of the stellar mass fractions ($f_\star$) for a sample high-redshift ($0.93 \le z 1.32$) infrared-selected galaxy clusters from Massive and Distant Clusters WISE Survey (MaDCoWS) compare them to Sunyaev-Zel'dovich (SZ) effect-selected in similar redshift range South Pole Telescope (SPT)-SZ Survey. do not find significant difference mean $f_\star$ between two selection methods, though we an unexpectedly large SZ-selected clusters. In addition, measure luminosity...
AbstractGeneral education college astronomy courses offer instructors both a unique audience and challenge. For many students, such course may be their first time encountering stand-alone class, it is also likely one of the last science they will take. Thus, primary goals often include imparting knowledge about Universe giving students some familiarity with processes science. In traditional environments, compartmentalize information into separate "life files" "course rather than integrating...
A crucial question in galaxy formation is what role new accretion has star formation. Theoretical models have predicted a wide range of correlation strengths between halo and Previously, we presented technique to observationally constrain this strength for isolated Milky Way-mass galaxies at $z\sim 0.12$, based on the density profile neighbouring galaxies. By applying both observational data from Sloan Digital Sky Survey simulation UniverseMachine, where can test different strengths, ruled...
In the United States, too few women in college obtain physics degrees. This policy analysis examines different strategies for addressing gap through improving courses and providing additional support to students. It re-commends that, although several options could be effective, stakeholders should prioritize implementing psychological interventions, they collaborate with groups from other STEM fields, humanities, interests.
Over the past decade, empirical constraints on galaxy-dark matter halo connection have significantly advanced our understanding of galaxy evolution. Past techniques focused connections between properties and stellar mass and/or star formation rates. Empirical in next decade will link assembly histories with galaxies' circumgalactic media, supermassive black holes, morphologies, kinematics, sizes, colors, metallicities, transient Uncovering these links resolve many critical uncertainties...
The growing push to address the lack of diversity in physics has come with an array curriculum reforms and interventions.There been work Physics Education Research (PER) that supported these reforms, including studying experiences identity development students from minoritized backgrounds.However, there a critical reflection on core methodologies constructs used PER.Here, we present analysis qualitative quantitative define measure "expert-like" thinking, beliefs, practices physics.We show...
Many reports, research, and initiatives have presented evidence-based strategies to create strong departments.The Effective Practices for Physics Programs (EP3) Initiative is a collaborative effort between the American Physical Society (APS) Association of Teachers (AAPT) compile curate such resources in an online "Guide" departments empower high-quality physics education.To ensure Guide helps improve education, this work aims understand whether (a written document) can effectively support...