Colin Norman
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View article: SN 2019tsf: Evidence for Extended Hydrogen-poor CSM in the Three-peaked Light Curve of Stripped Envelope of a Type Ib Supernova
SN 2019tsf: Evidence for Extended Hydrogen-poor CSM in the Three-peaked Light Curve of Stripped Envelope of a Type Ib Supernova Open
We present multiband ATLAS and ZTF photometry for SN 2019tsf, a Type Ib stripped-envelope supernova (SESN). The slow spectral evolution could be associated with an uncommon explosion mechanism specific to this SN. Possible explanations inc…
View article: A big red dot at cosmic noon
A big red dot at cosmic noon Open
We report the discovery of a little red dot (LRD), dubbed BiRD (‘big red dot’), at z ∼ 2.33 in the field around the z ∼ 6.3 quasar SDSS J1030+0524. Using JWST/NIRCam images, we identified it as a bright outlier in the F 200 W − F 356 W col…
View article: Unveiling the Cosmic Gems Arc at <i>z</i> ∼ 10 with JWST NIRCam
Unveiling the Cosmic Gems Arc at <i>z</i> ∼ 10 with JWST NIRCam Open
We present recent JWST NIRCam imaging observations of SPT0615-JD (also known as the Cosmic Gems Arc), lensed by the galaxy cluster SPT-CL J0615−5746. The 5 ″ long arc is the most highly magnified z > 10 galaxy known. It straddles the lensi…
View article: JWST Discovery of a High-redshift Tidal Disruption Event Candidate in COSMOS-Web
JWST Discovery of a High-redshift Tidal Disruption Event Candidate in COSMOS-Web Open
The rates and properties of tidal disruption events (TDEs) provide valuable insights into their host galaxy central stellar densities and the demographics of their central supermassive black holes. TDEs have been observed only at low redsh…
View article: The z = 9.625 Cosmic Gems Galaxy was a "Compact Blue Monster" Propelled by Massive Star Clusters
The z = 9.625 Cosmic Gems Galaxy was a "Compact Blue Monster" Propelled by Massive Star Clusters Open
The recent discovery of five massive stellar clusters at z=9.625 in the Cosmic Gems has raised the question about the formation mechanism of star clusters in the first half Gyr after the Big-Bang. We infer the total stellar mass in cluster…
View article: A big red dot at cosmic noon
A big red dot at cosmic noon Open
We report the discovery of a little red dot (LRD), dubbed BiRD ('big red dot'), at $z=2.33$ in the field around the $z=6.3$ quasar SDSSJ1030+0524. Using NIRCam images, we identified it as a bright outlier in the $F200W-F356W$ color vs $F35…
View article: What Can We Learn from the Nitrogen Abundance of High-<i>z</i> Galaxies?
What Can We Learn from the Nitrogen Abundance of High-<i>z</i> Galaxies? Open
We present measurements of the gas-phase oxygen and nitrogen abundances obtained by applying the direct method to JWST NIRspec R ∼ 1000 spectroscopy for six galaxies at redshift greater than 3. Our measurements are based on rest-frame opti…
View article: A recoiling supermassive black hole in a powerful quasar
A recoiling supermassive black hole in a powerful quasar Open
Supermassive black holes (SMBH) are thought to grow through accretion of matter and mergers. Models of SMBH mergers have long suffered the final parsec problem, where SMBH binaries may stall before energy loss from gravitational waves (GW)…
View article: What can we learn from the Nitrogen abundance of High-z galaxies?
What can we learn from the Nitrogen abundance of High-z galaxies? Open
We present measurements of the gas-phase Oxygen and Nitrogen abundances obtained by applying the direct method to JWST NIRspec $R\sim1000$ spectroscopy for 6 galaxies at redshift greater than 3. Our measurements are based on rest-frame opt…
View article: The radio properties of the JWST-discovered AGN
The radio properties of the JWST-discovered AGN Open
We explore the radio emission of JWST-selected Broad Line AGN (BLAGN, or type 1) in the GOODS-N field. We use deep radio data at different frequencies (144\,MHz, 1.5\,GHz, 3\,GHz, 5.5\,GHz, 10\,GHz), and we find that none of the {37} sourc…
View article: Feeding and feedback processes in the Spiderweb proto-intracluster medium <i>(Corrigendum)</i>
Feeding and feedback processes in the Spiderweb proto-intracluster medium <i>(Corrigendum)</i> Open
Erratum for: A&A, 682, A186 (2024), https://doi.org/10.1051/0004-6361/202347538
View article: SCRAs with a “Brand” New Look: In Vitro Cannabinoid Activity Profiling of Generic Ban-Evading Brominated Synthetic Cannabinoid Receptor Agonists and their Analogs
SCRAs with a “Brand” New Look: In Vitro Cannabinoid Activity Profiling of Generic Ban-Evading Brominated Synthetic Cannabinoid Receptor Agonists and their Analogs Open
Introduction: Since the enactment of the Chinese generic ban (2021), the synthetic cannabinoid receptor agonist (SCRA) market has vastly changed and now encompasses unexpected, ban-evading structures such as brominated and tail-less compou…
View article: In Vitro Characterization of the Pyrazole-Carrying Synthetic Cannabinoid Receptor Agonist 5F-3,5-AB-PFUPPYCA and its Structural Analogs
In Vitro Characterization of the Pyrazole-Carrying Synthetic Cannabinoid Receptor Agonist 5F-3,5-AB-PFUPPYCA and its Structural Analogs Open
Introduction: Pyrazole-carrying “FUPPYCA” synthetic cannabinoid receptor agonists (SCRAs) have made short-lived appearances on the market since 2015. However, 5F-3,5-AB-PFUPPYCA and 3,5-ADB-4en-PFUPPYCA have recently been detected in Scott…
View article: The Case for Super-Eddington Accretion: Connecting Weak X-ray and UV Line Emission in JWST Broad-Line AGN During the First Gyr of Cosmic Time
The Case for Super-Eddington Accretion: Connecting Weak X-ray and UV Line Emission in JWST Broad-Line AGN During the First Gyr of Cosmic Time Open
A multitude of JWST studies reveal a surprising over-abundance of over-massive accreting super-massive black holes (SMBHs) -- leading to a deepening tension between theory and observation in the first billion years of cosmic time. Across X…
View article: JWST MIRI Detections of Hα and [O iii] and a Direct Metallicity Measurement of the z = 10.17 Lensed Galaxy MACS0647−JD
JWST MIRI Detections of Hα and [O iii] and a Direct Metallicity Measurement of the z = 10.17 Lensed Galaxy MACS0647−JD Open
JWST spectroscopy has revolutionized our understanding of galaxies in the early Universe. Covering wavelengths up to 5.3 μ m, NIRSpec can detect rest-frame optical H α emission lines out to z = 7 and [O iii ] to z = 9.5. Observing these li…
View article: Identifying robust features of community structure in complex networks
Identifying robust features of community structure in complex networks Open
Network science has presented community detection as a valuable tool for revealing functional modules in complex systems rooted in the wiring architectures of complex networks. The varying procedures of community detection can produce, how…
View article: The Case for Super-Eddington Accretion: Connecting Weak X-ray and UV Line Emission in JWST Broad-Line AGN During the First Gyr of Cosmic Time
The Case for Super-Eddington Accretion: Connecting Weak X-ray and UV Line Emission in JWST Broad-Line AGN During the First Gyr of Cosmic Time Open
A multitude of JWST studies reveal a surprising over-abundance of over-massive accreting super-massive blackholes (SMBHs) -- leading to a deepening tension between theory and observation in the first billion years of cosmic time. Across X-…
View article: JWST NIRSpec High-resolution Spectroscopy of MACS0647–JD at z = 10.167: Resolved [O ii] Doublet and Electron Density in an Early Galaxy
JWST NIRSpec High-resolution Spectroscopy of MACS0647–JD at z = 10.167: Resolved [O ii] Doublet and Electron Density in an Early Galaxy Open
We present JWST/NIRSpec high-resolution G395H/F290LP spectroscopy of MACS0647−JD, a gravitationally lensed galaxy merger at z = 10.167. The new spectroscopy, which is acquired for the two lensed images (JD1 and JD2), detects and resolves e…
View article: JWST NIRSpec Spectroscopy of the Triply Lensed z = 10.17 Galaxy MACS0647–JD
JWST NIRSpec Spectroscopy of the Triply Lensed z = 10.17 Galaxy MACS0647–JD Open
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 imaging into two components, A and B. Spectroscopy of component A yield…
View article: Plyometric training increases thickness and volume of knee articular cartilage in mice
Plyometric training increases thickness and volume of knee articular cartilage in mice Open
Degeneration and thinning of articular cartilage lead to osteoarthritis and may result from reduced joint loading during e.g. bed rest or as a result of microgravity during space flight. Anabolic physical exercises for cartilage are not we…
View article: JWST NIRSpec High-resolution Spectroscopy of MACS0647-JD at z=10.167: Resolved [OII] Doublet and Electron Density in an Early Galaxy
JWST NIRSpec High-resolution Spectroscopy of MACS0647-JD at z=10.167: Resolved [OII] Doublet and Electron Density in an Early Galaxy Open
We present JWST/NIRSpec high-resolution spectroscopy G395H/F290LP of MACS0647-JD, a gravitationally lensed galaxy merger at $z=10.167$. The new spectroscopy, which is acquired for the two lensed images (JD1 and JD2), detects and resolves e…
View article: JWST MIRI detections of H$α$ and [O III] and direct metallicity measurement of the $z=10.17$ lensed galaxy MACS0647$-$JD
JWST MIRI detections of H$α$ and [O III] and direct metallicity measurement of the $z=10.17$ lensed galaxy MACS0647$-$JD Open
JWST spectroscopy has revolutionized our understanding of galaxies in the early universe. Covering wavelengths up to $5.3\,{\rm μm}$, NIRSpec can detect rest-frame optical emission lines H$α$ out to $z = 7$ and [O III] to $z = 9.5$. Observ…
View article: Unveiling the Cosmic Gems Arc at $z\sim10$ with JWST NIRCam
Unveiling the Cosmic Gems Arc at $z\sim10$ with JWST NIRCam Open
We present recent JWST NIRCam imaging observations of SPT0615-JD (also known as the Cosmic Gems Arc), lensed by the galaxy cluster SPT-CL J0615-5746. The 5 arcsec long arc is the most highly magnified $z>10$ galaxy known. It straddles the …
View article: Heavily obscured AGN detection: A radio versus X-ray challenge
Heavily obscured AGN detection: A radio versus X-ray challenge Open
Context. In the supermassive black hole (SMBH)-galaxy coevolution scenario, heavily obscured active galactic nuclei (AGN) represent a fundamental phase of SMBH growth during which most of the BH mass is accreted and the scaling relations w…
View article: Powerful Radio-loud Quasars Are Triggered by Galaxy Mergers in the Cosmic Bright Ages
Powerful Radio-loud Quasars Are Triggered by Galaxy Mergers in the Cosmic Bright Ages Open
While supermassive black holes are ubiquitous features of galactic nuclei, only a small minority are observed during episodes of luminous accretion. The physical mechanism(s) driving the onset of fueling and ignition in these active galact…
View article: Which Came First: Supermassive Black Holes or Galaxies? Insights from JWST
Which Came First: Supermassive Black Holes or Galaxies? Insights from JWST Open
Insights from JWST observations suggest that active galactic nuclei feedback evolved from a short-lived, high-redshift phase in which radiatively cooled turbulence and/or momentum-conserving outflows stimulated vigorous early star formatio…
View article: Uncovering a Massive z ∼ 7.7 Galaxy Hosting a Heavily Obscured Radio-loud Active Galactic Nucleus Candidate in COSMOS-Web
Uncovering a Massive z ∼ 7.7 Galaxy Hosting a Heavily Obscured Radio-loud Active Galactic Nucleus Candidate in COSMOS-Web Open
In this Letter, we report the discovery of the highest redshift, heavily obscured, radio-loud (RL) active galactic nucleus (AGN) candidate selected using JWST NIRCam/MIRI, mid-IR, submillimeter, and radio imaging in the COSMOS-Web field. U…
View article: Reaching for the stars – JWST/NIRSpec spectroscopy of a lensed star candidate at z = 4.76
Reaching for the stars – JWST/NIRSpec spectroscopy of a lensed star candidate at z = 4.76 Open
We present JWST/NIRSpec observations of a highly magnified star candidate at a photometric redshift of zphot ≃ 4.8, previously detected in JWST/NIRCam imaging of the strong lensing (SL) cluster MACS J0647+7015 (z = 0.591). The spectroscopi…
View article: Feeding and feedback processes in the Spiderweb proto-intracluster medium
Feeding and feedback processes in the Spiderweb proto-intracluster medium Open
Context. We present a detailed analysis of the thermal, diffuse emission of the proto-intracluster medium (proto-ICM) detected in the halo of the Spiderweb Galaxy at z = 2.16, within a radius of ∼150 kpc. Aims. Our main goal is to derive t…