Jane R. Rigby
A5079485326- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Paleontology and Stratigraphy of Fossils
- Astrophysics and Star Formation Studies
- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Marine Sponges and Natural Products
- Geological formations and processes
- Adaptive optics and wavefront sensing
- Marine Biology and Ecology Research
- Astronomical Observations and Instrumentation
- Plant and Fungal Species Descriptions
- Crustacean biology and ecology
- Plant Diversity and Evolution
- Geology and Paleoclimatology Research
- Diatoms and Algae Research
- Paleontology and Evolutionary Biology
- Botany, Ecology, and Taxonomy Studies
- History and Developments in Astronomy
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Evolution and Paleontology Studies
- Photocathodes and Microchannel Plates
- Marine and coastal plant biology
Goddard Space Flight Center
2016-2025
University of Arizona
2000-2024
Deleted Institution
2014-2024
BMT Group (United Kingdom)
2024
Molecular Templates (United States)
2023
American Society for Radiation Oncology
2019
Max Planck Institute for Astronomy
2019
Max Planck Society
2019
Brigham Young University
2006-2018
Carnegie Observatories
2006-2011
The Nuclear Spectroscopic Telescope Array (NuSTAR) mission, launched on 2012 June 13, is the first focusing high-energy X-ray telescope in orbit. NuSTAR operates band from 3 to 79 keV, extending sensitivity of far beyond ∼10 keV cutoff achieved by all previous satellites. inherently low background associated with concentrating light enables probe hard sky a more than 100-fold improvement over collimated or coded mask instruments that have operated this bandpass. Using its unprecedented...
We constrain the slope of star formation rate (SFR; log Ψ) to stellar mass (log M⋆) relation down (M⋆/M☉) = 8.4 9.2) at z 0.5 (z 2.5) with a mass-complete sample 39,106 star-forming galaxies selected from 3D-HST photometric catalogs, using deep photometry in CANDELS fields. For first time, we find that is dependent on mass, such it steeper low masses Ψ∝log than high Ψ∝(0.3–0.6)log M⋆). These low-mass slopes are found for three different indicators: combination ultraviolet (UV) and infrared...
We present a first analysis of deep 24 micron observations with the Spitzer Space Telescope sample nearly 1500 galaxies in thin redshift slice, 0.652x10^10 solar masses) are undergoing period intense star formation above their past-averaged SFR. In contrast, less than 1% equally-massive local universe have similarly activity. Morphologically-undisturbed dominate total infrared luminosity density and SFR density: at z~0.7, more half intensely star-forming spiral morphologies, whereas \~30%...
We use a 24 μm-selected sample containing more than 8000 sources to study the evolution of star-forming galaxies in redshift range from z = 0 ~ 3. obtain photometric redshifts for most our survey using method based on empirically built templates spanning ultraviolet mid-infrared wavelengths. The accuracy these is better 10% 80% sample. derived distribution detected by peaks at around 0.6-1.0 (the location peak being affected cosmic variance) and decays monotonically 1 have fitted infrared...
Using a mid-infrared calibration of the Cepheid distance scale based on recent observations at 3.6 μm with Spitzer Space Telescope, we have obtained new, high-accuracy Hubble constant. We established mid-IR zero point Leavitt law (the period–luminosity relation) using time-averaged data for 10 high-metallicity, Milky Way Cepheids having independently measured trigonometric parallaxes. adopted slope PL relation 80 long-period Large Magellanic Cloud (LMC) falling in period range 0.8 < log(P)...
Abstract This paper characterizes the actual science performance of James Webb Space Telescope (JWST), as determined from six month commissioning period. We summarize spacecraft, telescope, instruments, and ground system, with an emphasis on differences pre-launch expectations. Commissioning has made clear that JWST is fully capable achieving discoveries for which it was built. Moreover, almost across board, better than expected; in most cases, will go deeper faster expected. The telescope...
Abstract We report the discovery of an accreting supermassive black hole at z = 8.679. This galaxy, denoted here as CEERS_1019, was previously discovered a Ly α -break galaxy by Hubble with redshift from Keck. As part Cosmic Evolution Early Release Science (CEERS) survey, we have observed this source JWST/NIRSpec, MIRI, NIRCam, and NIRCam/WFSS uncovered plethora emission lines. The H β line is best fit narrow plus broad component, where latter measured 2.5 σ FWHM ∼1200 km s −1 . conclude...
Abstract The James Webb Space Telescope (JWST) is a large, infrared space telescope that has recently started its science program which will enable breakthroughs in astrophysics and planetary science. Notably, JWST provide the very first observations of earliest luminous objects universe start new era exoplanet atmospheric characterization. This transformative enabled by 6.6 m passively cooled with 5 layer sunshield. primary mirror comprised 18 controllable, low areal density hexagonal...
ABSTRACT Nearly a decade ago, we began to see indications that reionization-era galaxies power hard radiation fields rarely seen at lower redshift. Most striking were detections of nebular C iv emission in what appeared be typical low-mass galaxies, requiring an ample supply 48 eV photons triply ionize carbon. We have obtained deep JWST/NIRSpec R = 1000 spectroscopy the two z &gt; 6 iv-emitting known prior JWST. Here, present rest-UV optical spectrum one these systems, multiply-imaged...
Abstract The Cosmic Gems arc is among the brightest and highly magnified galaxies observed at redshift z ≈ 10.2 (ref. 1 ). However, it an intrinsically ultraviolet faint galaxy, in range of those now thought to drive reionization Universe 2–4 . Hitherto smallest features resolved a galaxy comparable are between few hundreds tens parsecs (pc) 5,6 Here we report JWST observations Gems. light into five star clusters located region smaller than 70 pc. They exhibit minimal dust attenuation low...
Abstract We present JWST/NIRSpec prism spectroscopy of MACS0647−JD, a triply lensed z ∼ 11 candidate discovered in Hubble Space Telescope imaging and spatially resolved by JWST into two components, A B. Spectroscopy component yields spectroscopic redshift = 10.17 based on seven detected emission lines: C iii ] λ 1907, 1909, [O ii 3727, [Ne 3869, 3968, H δ 4101, γ 4340, 4363. These are the second-most distant detections these lines to date, galaxy observed just 460 million years after Big...
Abstract We measure the gas-phase abundances of elements He, N, O, Ne, S, Ar, and Fe in an individual H ii region known to be leaking Lyman-continuum photons Sunburst Arc, a highly magnified galaxy at redshift z = 2.37. detect temperature-sensitive auroral lines [S ] λλ 4070, 4076, [O iii λ 4363, 6314, 7320, 7330, [Ne 3343 stacked spectrum five multiple images emitter (LCE), from which we directly electron temperature low-, intermediate-, high-ionization zones. also density-sensitive...
Galaxy source counts in the infrared provide strong constraints on evolution of bolometric energy output from distant galaxy populations. We present results deep 24 μm imaging Spitzer surveys, which include ≈5 × 104 sources to an 80% completeness ≃60 μJy. The rapidly rise at near-Euclidean rates down 5 mJy, increase with a super-Euclidean rate between 0.4 and 4 converge below ∼0.3 mJy. exceed expectations nonevolving models by factor ≳10 Sν ∼ 0.1 peak differential number corresponds...
New fossils from the Neoproterozoic Ediacara fauna of South Australia are interpreted as oldest known hexactinellid sponges. They occur within Member Rawnsley Quartzite (Pound Subgroup) several locations in Flinders Ranges. The new genus, Palaeophragmodictya , is characterized by disc-shaped impressions preserving characteristic spicular networks and reconstructed a convex sponge with peripheral frill an oscular disc at apex.
During the course of an ongoing CCD monitoring program to investigate low-level light variations in subdwarf B (sdB) stars, we have serendipitously discovered a new class low-amplitude, multimode sdB pulsators with periods order hour. These are more than factor 10 longer those previously known (EC 14026 stars), implying that they due gravity modes rather pressure modes. The period found only among cooler where surprisingly common. iron opacity instability drives short-period EC stars is...
We investigate the nature of a sample 92 Spitzer/MIPS 24 micron selected galaxies in CDFS, showing power law-like emission Spitzer/IRAC 3.6-8 bands. The main goal is to determine whether not detected X-rays (47% sample) are part hypothetical population obscured AGN even deep X-ray surveys. majority IR power-law ULIRGs at z>1, and those with LIRG-like luminosities usually X-rays. optical spectral energy distributions (SEDs) almost equally divided between BLAGN SED class (similar an...
We define a sample of 62 galaxies in the Chandra Deep Field-North whose Spitzer IRAC SEDs exhibit characteristic power-law emission expected luminous AGNs. study multiwavelength properties this and compare AGNs selected way to those via other color-color criteria. Only 55% are detected X-ray catalog at exposures >0.5 Ms, although search for faint results detection 85% ≥2.5 σ level. Most remaining likely host that heavily obscured X-ray. Because selection requires be energetically dominant...
Dinosaur extinction in Montana, Alberta, and Wyoming was a gradual process that began 7 million years before the end of Cretaceous accelerated rapidly final 0.3 Cretaceous, during interval apparent competition from evolving immigrating ungulates. This involves rapid reduction both diversity population density dinosaurs. The last dinosaurs known are channel contains teeth Mantuan mammals, seven species dinosaurs, Paleocene pollen. top this is 1.3 meters above likely position iridium anomaly,...
While both the mean and variance of daily temperature are forecasted to increase in future climate scenarios, studies spring frost risk vegetation have relied on changes understand these scenarios. We present a probabilistic model based stochastic‐crossing properties coupled temperature‐phenology which mean, variance, autocorrelation structure may be controlled through independent parameters. The results show that is as sensitive increases (which risk) decreases risk).
We report on observations of NGC1068 with NuSTAR, which provide the best constraints to date its $>10$~keV spectral shape. find no strong variability over past two decades, consistent Compton-thick AGN classification. The combined Chandra, XMM-Newton, and Swift-BAT dataset offers new insights into complex reflected emission. critical combination high signal-to-noise NuSTAR data a spatial decomposition Chandra allow us break several model degeneracies greatly aid physical interpretation. When...
Sponges are probably the earliest branching animals and their fossil record dates back to Precambrian. Identifying skeletal structure composition is thus a crucial step in improving our understanding of early evolution metazoans. Here, we present discovery 505–million-year-old chitin, found exceptionally well preserved Vauxia gracilenta sponges from Middle Cambrian Burgess Shale. Our new findings indicate that, given right fossilization conditions, chitin stable for much longer than...
Using Spitzer observations of classical Cepheids we have measured the true average distance modulus SMC to be $18.96 \pm 0.01_{stat} 0.03_{sys}$ mag (corresponding $62 0.3$ kpc), which is $0.48 0.01$ more distant than LMC. This in agreement with previous results from Cepheid observations, as well measurements other indicators such RR Lyrae stars and tip red giant branch. Utilizing properties mid--infrared Leavitt Law precise distances individual SMC, confirmed that galaxy tilted elongated...