A5038747928- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Solar and Space Plasma Dynamics
- Astrophysics and Cosmic Phenomena
- Magnetic and Electromagnetic Effects
- Atomic and Subatomic Physics Research
- Geophysics and Gravity Measurements
- Regional Economic and Spatial Analysis
- Health and Conflict Studies
- Geological Studies and Exploration
- Gene expression and cancer classification
- Biofuel production and bioconversion
- History and Developments in Astronomy
- Disaster Response and Management
- Gene Regulatory Network Analysis
- Relativity and Gravitational Theory
- Geophysics and Sensor Technology
- Optics and Image Analysis
University of California, Berkeley
2012-2021
University of Florida
2002-2006
University of California, Santa Cruz
1996-2005
University of Tampa
2005
University College London
2002
Lickenbrock
1996
The University of Sydney
1994
A bstract Probabilistic models have provided the underpinnings for state-of-the-art performance in many single-cell omics data analysis tasks, including dimensionality reduction, clustering, differential expression, annotation, removal of unwanted variation, and integration across modalities. Many being deployed are amenable to scalable stochastic inference techniques, accordingly they able process datasets realistic growing sizes. However, community-wide adoption probabilistic approaches is...
The Deep Extragalactic Evolutionary Probe (DEEP) is a series of spectroscopic surveys faint galaxies, targeted at understanding the properties and clustering galaxies redshifts z ~ 1. We present redshift catalog DEEP1 Groth Strip pilot phase this project, Keck LRIS survey in Survey imaged with HST WFPC2. data, including reduced spectra, are made publicly available through Web-accessible database. contains 658 secure galaxy median = 0.65. distribution these shows large-scale structure walls...
We report on observations of a type II quasar at redshift z = 3.288, identified as hard X-ray source in 185 ks observation with the Chandra X-Ray Observatory and high-redshift photometric candidate from deep, multiband optical imaging. CXO J084837.9+445352 (hereafter 52) shows an unusually spectrum which we infer absorbing column density NH (4.8 ± 2.1) × 1023 cm-2 (90% confidence) implied unabsorbed 2-10 keV rest-frame luminosity L2-10 3.3 1044 ergs s-1, well within regime. Hubble Space...
As part of the Deep Extragalactic Evolutionary Probe (DEEP) survey, a sample 190 field galaxies (I814 ≤ 23.5) in "Groth Survey Strip" has been used to analyze magnitude-size relation over range 0.1 < z 1.1. The survey is statistically complete this magnitude limit. All have photometric structural parameters, including bulge fractions (B/T), from Hubble Space Telescope images, and spectroscopic redshifts Keck Telescope. analysis includes determination selection function plane as redshift,...
A model for magnetic braking via a stellar wind synchronously rotating binaries is presented. It found that the field lines of secondary form closed loops or connect to white dwarf primary, leading reduction flux in open responsible braking. We show particular that, parameters typical AM Herculis-type binary systems, drastically reduced comparison values are usually adopted based on theories single stars. The cut-off sharp, occurring at polar strength about |$7 \times 10^7\, {\rm G}$| an...
view Abstract Citations (76) References (37) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Redshift Z approximately 1 Field Galaxies Observed with the Keck Telescope and Hubble Space Koo, David C. ; Vogt, Nicole P. Phillips, Andrew Guzman, Rafael Wu, K. L. Faber, S. M. Gronwall, Caryl Forbes, Duncan A. Illingworth, Garth D. Groth, Edward J. Davis, Marc Kron, Richard G. Szalay, Alexander We report results based on 35 new spectroscopic redshifts obtained for...
We present our first results on field X-ray sources detected in a deep, 184.7 ks observation with the Advanced CCD Imaging Spectrometer (ACIS-I) Chandra X-Ray Observatory. The observations target Lynx (α = 08h48m, δ +44°54') of SPICES, Spectroscopic Photometric Infrared-Chosen Extragalactic Survey, which contains three known X-ray–emitting clusters at redshifts z 0.57, 1.26, and 1.27. Not including clusters, 17' × ACIS-I we detect 132 0.5–2 keV (soft) band down to limiting flux ≈1.7 10-16...
Observations of AM Herculis binaries recently discovered by ROSAT and other surveys have shown that the do not exitbit a pronounced 2-3 h period gap, which is difficult to explain in terms canonical magnetic braking model for orbital evolution these binaries. We present new evolutionary scenario based on hypothesis stellar wind M-star secondary ceases be an effective mechanism loss angular momentum when rotation white dwarf becomes synchronized with motion
We present a sample of over 50 luminous field bulges (including ellipticals) found in the Groth Strip Survey (GSS), with 0.73< z < 1.04 and bulge magnitudes I <= 23. The exponential disk light is removed via decomposition HST images using GIM2D. find that 85% these are nearly as red local E/S0's have shallow slope small color dispersion color-luminosity relation, suggesting roughly coeval formation. surface brightnesses about 1 mag higher than bulges. These results explained...
The Deep Extragalactic Exploratory Probe (DEEP) is a multi-phase research program dedicated to the study of formation and evolution galaxies large scale structure in distant Universe. This paper describes first five-year phase, denoted DEEP1. A series ten DEEP1 papers will discuss range scientific topics (e.g., photometric spectral properties general galaxy survey, observed populations varied morphologies). observational basis for these studies Groth Survey Strip field, 127 square arcminute...
Removal of lignin from miscanthus liberates cellulose and hemicellulose for hydrolysis to obtain sugars that can subsequently be fermented ethanol or butanol. Extraction raw at 70°C is feasible when the extracting solvent contains a base (Ethylenediamine, EDA) mixed with an organic mildly hydrophobic ionic liquid. A 50–50 (by weight) mixture EDA ethylene glycol removes 75% weight ratio 10:1. At same miscanthus, 10–90 liquid, 1-ethyl-3-methylimidazolium tosylate ([Emim][Ts]) 60% lignin. These...
The X-ray-bright Seyfert 1 galaxy III Zw 2 was observed with XMM–Newton in 2000 July. Its X-ray spectrum can be described by a power law of photon index Γ= 1.7 and an extremely broad (FWHM∼ 140 000 km s−1) Fe Kα line at 6.44 keV. iron has equivalent width ∼800 eV. To study the long-term behaviour source we have analysed 25 yr data, from 1975 to 2000. There is no evidence significant intrinsic absorption within or soft excess XMM archival data. We do not detect rapid variability (a few × 103...
The recent detection of a large polarization degree in the optical emission an isolated neutron star led to suggestion that this has been first evidence vacuum strong magnetic field, effect predicted by quantum electrodynamics but never observed before. This claim was challanged paper Capparelli, Maiani & Polosa (2017), according whom much higher would be necessary positively identify polarization. Here we show their conclusions are biased several inadequate assumptions and have no impact on...
Applying tactical clinical ethics in rescue efforts following disasters is often complicated by chemical, biological, radiological, nuclear, or explosive devices that can compromise safety of personnel the field.
Isolated Neutron Stars are some of the most exciting stellar objects known to astronomers: they have extreme magnetic fields, with values up $10^{15}$ G, and, exception stellar-mass black holes, dense stars, densities $\approx 10^{14}$ g cm$^{-3}$. As such, perfect laboratories test theories electromagnetism and nuclear physics under conditions field density unattainable on Earth. In particular, interaction radiation strong fields is cause {\em vacuum birefringence}, an effect predicted by...
The X-ray sources observed in nearby galaxies show brightness distributions (log(N(>S))--log(S) curves) which can be described as single or broken power laws. Single power-law are often found for with vigorous ongoing star-formation activity, while laws elliptical and bulges of spiral galaxies. luminosity break caused by a population binaries contain neutron star accreting at the Eddington limit aging binary population. We that simple birth-death model reproduce log(N(>S))--log(S)...