Olivia R. Cooper
A5060100563- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Radio Astronomy Observations and Technology
- Adaptive optics and wavefront sensing
- CCD and CMOS Imaging Sensors
- Astrophysics and Cosmic Phenomena
- PARP inhibition in cancer therapy
- History and Developments in Astronomy
- Technology in Education and Healthcare
- Sports Performance and Training
- Historical and socio-economic studies of Spain and related regions
- Cooperative Studies and Economics
- Business, Innovation, and Economy
- Environmental Education and Sustainability
- Spatial and Panel Data Analysis
- BRCA gene mutations in cancer
- Monetary Policy and Economic Impact
- Embedded Systems and FPGA Design
- French Historical and Cultural Studies
- Plant Surface Properties and Treatments
The University of Texas at Austin
2021-2024
University of California, Irvine
2024
Northwestern University
2021
Smith College
2019
Massachusetts General Hospital
2017
Abstract We present the survey design, implementation, and outlook for COSMOS-Web, a 255 hr treasury program conducted by James Webb Space Telescope in its first cycle of observations. COSMOS-Web is contiguous 0.54 deg 2 NIRCam imaging four filters (F115W, F150W, F277W, F444W) that will reach 5 σ point-source depths ranging ∼27.5–28.2 mag. In parallel, we obtain 0.19 MIRI one filter (F770W) reaching ∼25.3–26.0 build on rich heritage multiwavelength observations data products available COSMOS...
Abstract We report the discovery of 15 exceptionally luminous 10 ≲ z 14 candidate galaxies discovered in first 0.28 deg 2 JWST/NIRCam imaging from COSMOS-Web survey. These sources span rest-frame UV magnitudes −20.5 > M −22, and thus constitute most intrinsically ≳ candidates identified by JWST to date. Selected via NIRCam imaging, deep ground-based observations corroborate their detection help significantly constrain photometric redshifts. analyze spectral energy distributions using...
Abstract We analyze rest-frame ultraviolet to optical spectra of three z ≃ 7.47–7.75 galaxies whose Ly α emission lines were previously detected with Keck/MOSFIRE observations, using the JWST/NIRSpec observations from Cosmic Evolution Early Release Science survey. From NIRSpec data, we confirm systemic redshifts these emitters, and emission-line ratio diagnostics indicate highly ionized metal-poor. investigate line properties, including flux, velocity offset, spatial extent. For one galaxy...
Abstract JWST has enabled detecting and spatially resolving the heavily dust-attenuated stellar populations of submillimeter galaxies, revealing detail that was previously inaccessible. In this work, we construct a sample 289 galaxies with joint Atacama Large Millimeter/submillimeter Array (ALMA) constraints in COSMOS field. Sources are originally selected using SCUBA-2 instrument have archival ALMA observations from various programs. Their NIRCam imaging is COSMOS-Web PRIMER. We extract...
Abstract We present a search for extremely red, dust-obscured, z > 7 galaxies with JWST/NIRCam+MIRI imaging over the first 20 arcmin 2 of publicly available Cycle 1 data from COSMOS-Web, CEERS, and PRIMER surveys. Based on their red color in F277W−F444W (∼2.5 mag) detection MIRI/F770W (∼25 mag), we identify two galaxies, COS-z8M1 CEERS-z7M1, that have best-fit photometric redshifts <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>z</mml:mi>...
Abstract Substantial populations of massive quiescent galaxies at z ≥ 3 challenge our understanding rapid galaxy growth and quenching over short timescales. In order to piece together this evolutionary puzzle, more statistical samples these objects are required. Established techniques for identifying increasingly inefficient unconstrained > 3. As a result, studies report that as much 70% may be missed from existing surveys. work, we propose new empirical color selection technique designed...
Abstract In this Letter, we report the discovery of highest redshift, heavily obscured, radio-loud (RL) active galactic nucleus (AGN) candidate selected using JWST NIRCam/MIRI, mid-IR, submillimeter, and radio imaging in COSMOS-Web field. Using multifrequency observations mid-IR photometry, identify a powerful, RL, growing supermassive black hole with significant spectral steepening energy distribution ( f 1.28 GHz ∼ 2 mJy, q 24 μ m = −1.1, α 1.28−3 − 1.2, Δ 0.4). conjunction ALMA, deep...
Abstract We study of the role galaxy–galaxy interactions and disk instabilities in producing starburst activity galaxies out to z = 4. For this, we use a sample 387 with robust total star formation rate measurements from Herschel, gas masses Atacama Large Millimeter/submillimeter Array, stellar redshifts multiband photometry, JWST/NIRCam rest-frame optical imaging. Using mass-controlled samples, find an increased fraction interacting regime at all This increase correlates efficiency (SFE)...
We analyze rest-frame ultraviolet to optical spectra of three $z\simeq7.47$ - $7.75$ galaxies whose Ly$\alpha$-emission lines were previously detected with Keck/MOSFIRE observations, using the JWST/NIRSpec observations from Cosmic Evolution Early Release Science (CEERS) survey. From NIRSpec data, we confirm systemic redshifts these Ly$\alpha$ emitters, and emission-line ratio diagnostics indicate highly ionized metal poor. investigate line properties, including flux, velocity offset, spatial...
Abstract Selecting the first galaxies at z > 7 − 10 from JWST surveys is complicated by < 6 contaminants with degenerate photometry. For example, strong optical nebular emission lines may mimic JWST/NIRCam photometry of 7–10 Lyman-break (LBGs). Dust-obscured 3 in particular are potentially important contaminants, and their faint rest-optical spectra have been historically difficult to observe. A lack line continuum measures for dusty now makes it test expected solutions NIRCam...
Due to their extremely dust-obscured nature, much uncertainty still exists surrounding the stellar mass growth and content in dusty, star-forming galaxies (DSFGs) at $z>1$. In this work, we present a numerical model built using empirical data on DSFGs estimate contributions across first $\sim$10 Gyr of cosmic time. We generate function that extends beyond limit functions literature, predict massive constitute as $50-100\%$ all with M $\ge10^{11}$M$_\odot$ number density find general...
Abstract The PASSAGES (Planck All-Sky Survey to Analyze Gravitationally-lensed Extreme Starbursts) collaboration has recently defined a sample of 30 gravitationally lensed dusty star-forming galaxies (DSFGs). These rare, submillimeter-selected objects enable high-resolution views the most extreme sites star formation in at cosmic noon. Here, we present first major compilation strong lensing analyses using lenstool for PASSAGES, including 15 spanning z = 1.1–3.3, complementary information...
JWST has revealed a population of compact and extremely red galaxies at $z>4$, which likely host active galactic nuclei (AGN). We present sample 434 ``little dots'' (LRDs), selected from the 0.54 deg$^2$ COSMOS-Web survey. fit galaxy AGN SED models to derive redshifts physical properties; spans $z\sim5$-$9$ after removing brown dwarf contaminants. consider two extreme scenarios: either LRDs are all AGN, their continuum emission is dominated by accretion disk, or they star-forming galaxies,...
Abstract We report the identification of 15 galaxy candidates at z ≥ 9 using initial COSMOS-Web JWST observations over 77 arcmin 2 through four Near Infrared Camera filters (F115W, F150W, F277W, and F444W) with an overlap Mid-Infrared Imager (F770W) 8.7 . fit sample several publicly available spectral energy distribution (SED) fitting photometric redshift codes determine their redshifts between = 9.3 10.9 (〈 〉 10.0), UV magnitudes M −21.2 −19.5 (with 〈 −20.2), rest-frame slopes β −2.4)....
Abstract We present Atacama Large Millimeter/submillimeter Array (ALMA) Band 7 observations of a remarkably bright galaxy candidate at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>z</mml:mi> </mml:mrow> <mml:mi>phot</mml:mi> </mml:msub> <mml:mo>=</mml:mo> <mml:msubsup> <mml:mn>16.7</mml:mn> <mml:mo>−</mml:mo> <mml:mn>0.3</mml:mn> <mml:mo>+</mml:mo> <mml:mn>1.9</mml:mn> </mml:msubsup> </mml:math> ( M UV = −21.6), S5-z17-1,...
Substantial populations of massive quiescent galaxies at $z\ge3$ challenge our understanding rapid galaxy growth and quenching over short timescales. In order to piece together this evolutionary puzzle, more statistical samples these objects are required. Established techniques for identifying increasingly inefficient unconstrained $z>3$. As a result, studies report that as much 70\% $z>3$ may be missed from existing surveys. work, we propose new empirical color selection technique designed...
ABSTRACT We present a spectroscopic survey of Ly α emitters in the Extended Groth Strip (EGS) field, targeting regime near Epoch Reionization. Using Keck/DEep Imaging Multi-Object Spectrograph, we observed 947 high-z candidates with photometric redshifts from 3 &lt; zphot 7 and down to an H-band (Hubble Space Telescope/Wide Field Camera F160W) magnitude limit &lt;27.5. Observations were taken over course eight nights, integration times ranging 4 7.8 h. Our secured 137 unique...
Abstract A complete census of dusty star-forming galaxies (DSFGs) at early epochs is necessary to constrain the obscured contribution cosmic star formation rate density (CSFRD); however, DSFGs beyond z ∼ 4 are both rare and hard identify from photometric data alone due degeneracies in submillimeter photometry with redshift. Here, we present a pilot study obtaining follow-up Atacama Large Millimeter Array (ALMA) 2 mm observations sample 39 850 μ m-bright SSA22 field. Empirical modeling...
Abstract A growing number of far-infrared (FIR) bright sources completely invisible in deep extragalactic optical surveys hint at an elusive population z > 4 dusty, star-forming galaxies. Cycle 1 JWST are now detecting their rest-frame light, which provides key insight into stellar properties and statistical constraints on the as a whole. This work presents Near Infrared Camera (NIRCam) counterpart from COSMOS-Web survey to FIR SCUBA-2 Atacama Large Millimeter/submillimeter Array (ALMA)...
We present the Cosmic Evolution Early Release Science (CEERS) Survey, a 77.2 hour Director's Discretionary Program. CEERS demonstrates, tests, and validates efficient extragalactic surveys using coordinated, overlapping parallel observations with JWST instrument suite, including NIRCam MIRI imaging, NIRSpec low (R~100) medium (R~1000) resolution spectroscopy, slitless grism (R~1500) spectroscopy. targets Hubble Space Telescope-observed region of Extended Groth Strip (EGS) field, supported by...
Supernova may be the dominant channel by which dust grains accumulate in galaxies during first Gyr of cosmic time as formation channels important for lower redshift galaxies, e.g., AGB stars and grain growth, not have had sufficient to take over. Supernovae (SNe) produce fewer small grains, leading a flatter attenuation law. In this work, we fit observations 138 spectroscopically confirmed z>6 adopting standard spectral energy distribution modeling assumptions compare law prescriptions that...
Abstract We report candidate C iii ]1907,1909 Å emission at 3.6 σ z = 4.521 using MultiObject Spectrometer for Infra-Red Exploration Y -band spectroscopy of COS J100029.9+021142.5. The galaxy was a filler target the Web Epoch Reionization Lyman-alpha Survey, large spectroscopic campaign targeting Ly α in Reionization. Based on Bayesian Spectral Energy Distribution fitting, we find consistency between photometric ( p 4.46 ± 0.09) and spec 0.002) redshifts measure stellar mass to be <mml:math...
Abstract The dearth of high-quality spectroscopy dusty star-forming galaxies (DSFGs)—the main drivers the assembly dust and stellar mass at peak activity in Universe—greatly hinders our ability to interpret their physical processes evolutionary pathways. We present JWST/NIRSpec observations from RUBIES four submillimeter-selected, Atacama Large Millimeter/submillimeter Array (ALMA)-detected DSFGs cosmic noon, z ∼ 2.3–2.7. While photometry uniformly suggests vigorous ongoing star formation...
Abstract We present the Cosmic Evolution Early Release Science (CEERS) Survey, a 77.2 hr Director’s Discretionary Program. CEERS demonstrates, tests, and validates efficient extragalactic surveys using coordinated, overlapping parallel observations with JWST instrument suite, including NIRCam MIRI imaging, NIRSpec low- ( R ∼ 100) medium- 1000) resolution spectroscopy, slitless grism 1500) spectroscopy. targets Hubble Space Telescope–observed region of Extended Groth Strip field, supported by...
We present the Red Unknowns: Bright Infrared Extragalactic Survey (RUBIES) providing JWST/NIRSpec spectroscopy of red sources selected across ∼150,arcmin^2 from public JWST/NIRCam imaging in UDS and EGS fields. The novel observing strategy RUBIES offers a well-quantified selection function. survey has been optimised to reach high ($>70%$) spectroscopic completeness for bright F150W-F444W >2) that are very rare. To place these rare context, we simultaneously observed reference sample...