Search Publications
Implication of Galaxy-scale Negative Feedback by One of the Most Powerful Multiphase Outflows in a Hyperluminous Infrared Galaxy at Intermediate Redshift
Imanishi, Masatoshi; Iono, Daisuke; Saito, Toshiki +12 more
Powerful galactic outflows driven by active galactic nuclei (AGNs) are commonly considered as one of the main mechanisms to regulate star formation in massive galaxies. Ultra- and hyperluminous IR galaxies (U/HyLIRGs) are thought to represent a transition phase of galaxies from a rapidly growing period to a quiescent status as gas is swept out by …
Prediction of Star Formation Rates Using an Artificial Neural Network
Woo, Jong-Hak; Ayubinia, Ashraf; Kim, Changseok +2 more
In this study we develop an artificial neural network to estimate the infrared (IR) luminosity and star formation rates (SFR) of galaxies. Our network is trained using "true" IR luminosity values derived from modeling the IR spectral energy distributions of FIR-detected galaxies. We explore five different sets of input features, each incorporating…
ASKAP Observations of the Radio Shell in the Composite Supernova Remnant G310.6-1.6
Hopkins, Andrew M.; Kothes, Roland; Lazarević, Sanja +12 more
We report the observations of the radio shell of the supernova remnant (SNR) G310.6–1.6 at 943 MHz from the Evolutionary Map of the Universe (EMU) and the Polarization Sky Survey of the Universe's Magnetism (POSSUM) surveys by using the Australian Square Kilometre Array Pathfinder (ASKAP). We detect polarized emission from the central pulsar wind …
ALMA Observations of Peculiar Embedded Icy Objects
Onaka, Takashi; Sakon, Itsuki; Shimonishi, Takashi
We report the results of molecular line observations with the Atacama Large Millimeter/submillimeter Array (ALMA) toward two peculiar icy objects, which were discovered serendipitously by infrared spectroscopic survey of the Galactic plane with the AKARI satellite. Previous infrared observations have reported that both objects show deep ice and du…
The Sonora Substellar Atmosphere Models. IV. Elf Owl: Atmospheric Mixing and Chemical Disequilibrium with Varying Metallicity and C/O Ratios
Fortney, Jonathan J.; Batalha, Natasha E.; Marley, Mark S. +7 more
Disequilibrium chemistry due to vertical mixing in the atmospheres of many brown dwarfs and giant exoplanets is well established. Atmosphere models for these objects typically parameterize mixing with the highly uncertain K zz diffusion parameter. The role of mixing in altering the abundances of C-N-O-bearing molecules has mostly been…
The SN 2023ixf Progenitor in M101. II. Properties
Van Dyk, Schuyler D.; Matheson, Thomas; Howell, Steve B. +12 more
We follow our first paper with an analysis of the ensemble of the extensive preexplosion ground- and space-based infrared observations of the red supergiant (RSG) progenitor candidate for the nearby core-collapse supernova SN 2023ixf in Messier 101, together with optical data prior to the explosion obtained with the Hubble Space Telescope (HST). W…
The Dynamic, Chimeric Inner Disk of PDS 70
Banzatti, Andrea; Gaidos, Eric; Shappee, Benjamin J. +4 more
Transition disks, with inner regions depleted in dust and gas, could represent later stages of protoplanetary disk evolution when newly formed planets are emerging. The PDS 70 system has attracted particular interest because of the presence of two giant planets in orbits at tens of astronomical units within the inner disk cavity, at least one of w…
PROJECT-J: JWST Observations of HH46 IRS and Its Outflow. Overview and First Results
Hartigan, Patrick; Codella, Claudio; Alcalá, Juan M. +23 more
We present the first results of the JWST program PROJECT-J (PROtostellar JEts Cradle Tested with JWST), designed to study the Class I source HH46 IRS and its outflow through NIRSpec and MIRI spectroscopy (1.66–28 µm). The data provide line images (∼6.″6 in length with NIRSpec, and up to ∼20″ with MIRI) revealing unprecedented details within …
5–25 µm Galaxy Number Counts from Deep JWST Data
Pérez-González, Pablo G.; Bunker, Andrew J.; Shivaei, Irene +5 more
Galaxy number counts probe the evolution of galaxies over cosmic time and serve as a valuable comparison point to theoretical models of galaxy formation. We present new galaxy number counts in eight photometric bands between 5 and 25 µm from the Systematic Mid-infrared Instrument Legacy Extragalactic Survey and the JWST Advanced Deep Extraga…
Identifying Jittering Jet-shaped Ejecta in the Cygnus Loop Supernova Remnant
Soker, Noam; Shishkin, Dmitry; Kaye, Roy
Analyzing images of the Cygnus Loop, a core-collapse supernova (CCSN) remnant, in different emission bands, we identify a point-symmetrical morphology composed of three symmetry axes that we attribute to shaping by three pairs of jets. The main jet axis has an elongated S shape, appearing as a faint narrow zone in visible and UV. We term it the S-…