Olivia Jones
A5078987740- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Galaxies: Formation, Evolution, Phenomena
- Calibration and Measurement Techniques
- Astro and Planetary Science
- Adaptive optics and wavefront sensing
- Spectroscopy and Laser Applications
- Astrophysical Phenomena and Observations
- Photocathodes and Microchannel Plates
- Nuclear Physics and Applications
- Atmospheric Ozone and Climate
- Scientific Measurement and Uncertainty Evaluation
- Radio Astronomy Observations and Technology
- Advanced Electrical Measurement Techniques
- Photonic and Optical Devices
- Ocular and Laser Science Research
- CCD and CMOS Imaging Sensors
- Optical and Acousto-Optic Technologies
- Pulsars and Gravitational Waves Research
- Nonlinear Optical Materials Research
- Aerospace Engineering and Energy Systems
- Adhesion, Friction, and Surface Interactions
University of Arizona
2022-2025
UK Astronomy Technology Centre
2018-2024
Royal Observatory
2018-2024
University of Iowa
2024
Norwegian Womens Public Health Association
2024
University of Manchester
2010-2024
Purdue University West Lafayette
2019-2023
Western Kentucky University
2023
Cancer Research UK Manchester Institute
2023
American Dental Association
2021
Abstract The Mid-Infrared Instrument (MIRI) extends the reach of James Webb Space Telescope (JWST) to 28.5 μ m. It provides subarcsecond-resolution imaging, high sensitivity coronagraphy, and spectroscopy at resolutions λ /Δ ∼ 100–3500, with high-resolution mode employing an integral field unit provide spatial data cubes. resulting broad suite capabilities will enable huge advances in studies over this wavelength range. This overview describes history acquiring capability for JWST. discusses...
The Medium-Resolution Spectrometer (MRS) provides one of the four operating modes Mid-Infrared Instrument (MIRI) on board James Webb Space Telescope (JWST). MRS is an integral field spectrometer, measuring spatial and spectral distributions light across 5-28 $\mu m$ wavelength range with a resolving power between 3700-1300. We present MRS's optical, spectral, spectro-photometric performance, as achieved in flight, we report effects that limit instrument's ultimate sensitivity. flight...
The nearby Supernova 1987A was accompanied by a burst of neutrino emission, which indicates that compact object (a neutron star or black hole) formed in the explosion. There has been no direct observation this object. In work, we observe supernova remnant with JWST spectroscopy finding narrow infrared emission lines argon and sulphur. line is spatially unresolved blueshifted velocity relative to rest frame. We interpret as gas illuminated source ionizing photons located close center...
The MRS is one of the four observing modes JWST/MIRI. Using JWST in-flight data unresolved (point) sources, we can derive absolute spectral response function (ASRF) starting from raw data. Spectral fringing plays a critical role in derivation and interpretation ASRF. In this paper, present an alternative way to calibrate Firstly, aim fringe correction that accounts for dependence properties on MIRI pupil illumination detector pixel sampling point spread function. Secondly, ASRF using flux...
Abstract We present here the first ever mid-infrared spectroscopic time series observation of transiting exoplanet L 168-9 b with Mid-Infrared Instrument (MIRI) on James Webb Space Telescope. The data were obtained as part MIRI commissioning activities, to characterize performance Low Resolution Spectroscopy (LRS) mode for these challenging observations. To assess LRS performance, we performed two independent analyses data. find that a single transit reached spectro-photometric precision ∼50...
Abstract Carbon-rich Wolf–Rayet (WR) binaries are a prominent source of carbonaceous dust that contribute to the budget galaxies. The “textbook” example an episodic dust-producing WR binary, 140 (HD 193793), provides us with ideal laboratory for investigating physics and kinematics in extreme environment. This study is among first utilize two separate JWST observations, from Cycle 1 ERS (2022 July) 2 (2023 September), measure 140’s confirm its morphology. To proper motions projected...
We present the classification of 197 point sources observed with Infrared Spectrograph in SAGE-Spec Legacy program on Spitzer Space Telescope. introduce a decision-tree method object based infrared spectral features, continuum and energy distribution shape, bolometric luminosity, cluster membership, variability information, which is used to classify sample sources. The decision tree has broad application mid-infrared spectroscopic surveys, where supporting photometry information are...
Reward dysfunction is thought to be play a critical role in the pathogenesis of depression. Multiple studies have linked depression abnormal neural sensitivity monetary rewards, but it remains unclear whether this reward generalizable other rewards types. The current study begins address gap by assessing both and social relation depressive symptoms. We recorded event-related potentials (ERPs) during two incentive delay tasks, one with reward. Both tasks were administered within same sample,...
Abstract We present initial results from JWST NIRSpec integral field unit observations of the nearby supernova SN 1987A. The provide first spatially resolved spectroscopy ejecta and equatorial ring (ER) over 1–5 μ m range. construct 3D emissivity maps [Fe i ] 1.443 line inner He 1.083 reverse shock (RS), where former probes explosion geometry latter traces structure circumstellar medium. also a model for integrated spectrum ejecta. map reveals highly asymmetric morphology resembling broken...
The Mid-Infrared Instrument (MIRI) aboard the James Webb Space Telescope (JWST) provides observatory with a huge advance in mid-infrared imaging and spectroscopy covering wavelength range of 5–28 µm. This paper describes performance characteristics MIRI imager as understood during commissioning activities, through its first year science operations. We discuss measurements results imager’s point spread function, flux calibration, background, distortion flat fields well pertaining to best...
The SAGE-Spec Spitzer Legacy program is a spectroscopic follow-up to the SAGE-LMC photometric survey of Large Magellanic Cloud carried out with Space Telescope. We present an overview and some its first results. aims study life cycle gas dust in Cloud, provide information essential classification point sources observed earlier survey. acquired 224.6 hours observations using InfraRed Spectrograph SED mode Multiband Imaging Photometer for Spitzer. data, along archival spectroscopy objects are...
The Magellanic Clouds are uniquely placed to study the stellar contribution dust emission. Individual stars can be resolved in these systems even mid-infrared, and they close enough allow detection of infrared excess caused by dust. We have searched Spitzer Space Telescope data archive for all Infrared Spectrograph (IRS) staring-mode observations Small Cloud (SMC) found that 209 Array Camera (IRAC) point sources within footprint Surveying Agents Galaxy Evolution (SAGE-SMC) Legacy programme...
The Infrared Spectrograph (IRS) on the {\em Spitzer Space Telescope} observed nearly 800 point sources in Large Magellanic Cloud (LMC), taking over 1,000 spectra. 197 of these targets were as part Sage-Spec Legacy program; remainder are from a variety different calibration, guaranteed time and open projects. We classify into types according to their infrared spectral features, continuum energy distribution shape, bolometric luminosity, cluster membership, variability information, using...
Abstract In this work, we present spectra of 11 young stellar objects (YSOs) taken with the Mid-Infrared Instrument / Medium Resolution Spectroscopy (MRS) instrument on board James Webb Space Telescope (JWST). The YSOs are located in N79 region Large Magellanic Cloud (LMC), an active star-forming hundreds Spitzer- and Herschel-identified host to super star cluster (SSC) candidate H72.97-69.39. three giant molecular clouds (East, West, South) have varying formation rates populations. MRS...
Abstract We present an imaging survey of the Spitzer I star-forming region in NGC 6822 conducted with NIRCam and MIRI instruments on board JWST. Located at a distance 490 kpc, is nearest non-interacting low-metallicity (∼0.2 Z ⊙ ) dwarf galaxy. It hosts some brightest known H ii regions local universe, including recently discovered sites highly embedded active star formation. Of these, youngest most active, houses 90 color-selected candidate young stellar objects (YSOs) identified from Space...
The survey for DUST in Nearby Galaxies with Spitzer (DUSTiNGS) identified several candidate Asymptotic Giant Branch (AGB) stars nearby dwarf galaxies and showed that dust can form even very metal-poor systems (Z ~ 0.008 $Z_\odot$). Here, we present a follow-up WFC3/IR on the Hubble Space Telescope (HST), using filters are capable of distinguishing carbon-rich (C-type) from oxygen-rich (M-type) stars: F127M, F139M, F153M. We include six star-forming DUSTiNGS (NGC 147, IC 10, Pegasus dIrr,...
Abstract During the commissioning of JWST, Medium-Resolution Spectrometer (MRS) on Mid-Infrared Instrument (MIRI) observed planetary nebula SMP LMC 058 in Large Magellanic Cloud. The MRS was designed to provide medium resolution (R = λ/Δλ) 3D spectroscopy whole MIRI range. is only source JWST that both spatially and spectrally unresolved by a good test JWST’s capabilities. new spectra reveal wealth emission lines not previously detected this nebula. From these lines, spectral resolving power...
Abstract We present infrared aperture-masking interferometry (AMI) observations of newly formed dust from the colliding winds massive binary Wolf–Rayet system WR 137 with JWST using Near Infrared Imager and Slitless Spectrograph (NIRISS). NIRISS AMI a point-spread function calibrator star, HD 228337, were taken F380M F480M filters in 2022 July August as part Director’s Discretionary Early Release Science program #1349. Interferometric observables (squared visibilities closure phases)...
ABSTRACT NGC 6822 is a nearby (∼490 kpc) non-interacting low-metallicity (0.2 Z⊙) dwarf galaxy which hosts several prominent H ii regions, including sites of highly embedded active star formation. In this work, we present an imaging survey conducted with the Near Infrared Camera (NIRCam) and Mid-Infrared Instrument (MIRI) onboard JWST. We describe data reduction, source extraction, stellar population identifications from combined near- mid-infrared (IR) photometry. Our NIRCam observations...
Abstract We present a JWST imaging survey of I Zw 18, the archetypal extremely metal-poor, star-forming (SF), blue compact dwarf galaxy. With an oxygen abundance only ∼3% Z ⊙ , it is among lowest-metallicity systems known in local Universe, and is, therefore, excellent accessible analog for galactic building blocks which existed at early epochs ionization star formation. These data provide comprehensive infrared (IR) view 18 with eight filters utilizing both Near Infrared Camera (F115W,...
Abstract We present a JWST imaging survey with NIRCam and MIRI of NGC 346, the brightest star-forming region in Small Magellanic Cloud. By combining aperture point-spread function photometry 11 wavelength bands across these two instruments, we have detected more than 200,000 unique sources. Using near-infrared color analysis, observe various evolved young populations, including 196 stellar objects (YSOs) pre-main-sequence stars suitable for forthcoming spectroscopic studies. expand upon this...
We have detected the 10 um silicate feature and 11.3 crystalline forsterite in absorption 21 oxygen-rich AGB stars Galactic Bulge. The depths of indicate highly-obscured circumstellar environments. additional features may suggest either an extended envelope or dust formation a high-density environment. also modeled Spectral Energy Distributions sample using radiative transfer models, compared results to wind speeds measured 1612 MHz OH masers, as well previous estimates properties. sixteen...