Search Publications
Chemodynamical models of our Galaxy
Vasiliev, Eugene; Binney, James
A chemodynamical model of our Galaxy is fitted to data from DR17 of the APOGEE survey supplemented with data from the StarHorse catalogue and Gaia DR3. Dynamically, the model is defined by action-based distribution functions for dark matter and six stellar components plus a gas disc. The gravitational potential jointly generated by the model's com…
Ground-based and JWST Observations of SN 2022pul. I. Unusual Signatures of Carbon, Oxygen, and Circumstellar Interaction in a Peculiar Type Ia Supernova
Temim, Tea; Filippenko, Alexei V.; Coulter, David A. +79 more
Nebular-phase observations of peculiar Type Ia supernovae (SNe Ia) provide important constraints on progenitor scenarios and explosion dynamics for both these rare SNe and the more common, cosmologically useful SNe Ia. We present observations from an extensive ground- and space-based follow-up campaign to characterize SN 2022pul, a super-Chandrase…
A unified model for the clustering of quasars and galaxies at z ≈ 6
Hennawi, Joseph F.; Naidu, Rohan P.; Kashino, Daichi +12 more
Recent observations from the EIGER JWST program have measured for the first time the quasar-galaxy cross-correlation function at
Lense-Thirring precession after a supermassive black hole disrupts a star
Loewenstein, Michael; Pasham, Dheeraj R.; Guolo, Muryel +8 more
An accretion disk formed around a supermassive black hole after it disrupts a star is expected to be initially misaligned with respect to the equatorial plane of the black hole. This misalignment induces relativistic torques (the Lense-Thirring effect) on the disk, causing the disk to precess at early times, whereas at late times the disk aligns w…
OH as a probe of the warm-water cycle in planet-forming disks
Gordon, Karl D.; Onaka, Takashi; Fuente, Asunción +51 more
Water is a key ingredient for the emergence of life as we know it. Yet, its destruction and reformation in space remain unprobed in warm gas (T > 300 K). Here we detect with the James Webb Space Telescope the emission of the hydroxyl radical (OH) from d203-506, a planet-forming disk exposed to external far-ultraviolet (FUV) radiation. These obs…
Census for the rest-frame optical and UV morphologies of galaxies at z = 4-10: First phase of inside-out galaxy formation
Ono, Yoshiaki; Ouchi, Masami; Harikane, Yuichi +7 more
We present the rest-frame optical and UV surface brightness (SB) profiles for 149 galaxies with Mopt < -19.4 mag at z = 4-10 (29 of which are spectroscopically confirmed with JWST NIRSpec), securing high signal-to-noise ratios of 10-135 with deep JWST NIRCam 1-$5\, \mu$m images obtained by the CEERS survey. We derive morphologies of …
Characterising TOI-732 b and c: New insights into the M-dwarf radius and density valley
Alonso, R.; Deleuil, M.; Erikson, A. +88 more
Context. TOI-732 is an M dwarf hosting two transiting planets that are located on the two opposite sides of the radius valley. Inferring a reliable demographics for this type of systems is key to understanding their formation and evolution mechanisms.
Aims: By doubling the number of available space-based observations and increasing the number…
The debris of the 'last major merger' is dynamically young
Horta, Danny; Sanderson, Robyn; Donlon, Thomas +4 more
The Milky Way's (MW) inner stellar halo contains an [Fe/H]-rich component with highly eccentric orbits, often referred to as the 'last major merger.' Hypotheses for the origin of this component include Gaia-Sausage/Enceladus (GSE), where the progenitor collided with the MW proto-disc 8-11 Gyr ago, and the Virgo Radial Merger (VRM), where the proge…
A SPectroscopic Survey of Biased Halos In the Reionization Era (ASPIRE): Broad-line AGN at z = 4‑5 Revealed by JWST/NIRCam WFSS
Hennawi, Joseph F.; Shen, Yue; Fan, Xiaohui +33 more
Low-luminosity active galactic nuclei (AGNs) with low-mass black holes (BHs) in the early universe are fundamental to understanding the BH growth and their coevolution with the host galaxies. Utilizing JWST NIRCam Wide Field Slitless Spectroscopy, we perform a systematic search for broad-line Hα emitters (BHAEs) at z ≈ 4–5 in 25 fields of the A SP…
Star Formation at the Epoch of Reionization with CANUCS: The Ages of Stellar Populations in MACS1149-JD1
Harshan, Anishya; Martis, Nicholas S.; Rihtaršič, Gregor +15 more
We present measurements of stellar populations properties of a z = 9.1 gravitationally lensed galaxy MACS1149-JD1 using deep James Webb Space Telescope NIRISS slitless spectroscopy as well as NIRISS and NIRCam imaging from the CAnadian NIRISS Unbiased Cluster Survey (CANUCS). The galaxy is split into four components. Three magnified (µ ~ 11)…