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Ultra-high-resolution observations of persistent null-point reconnection in the solar corona
Barczynski, K.; Peter, H.; Chitta, L. P. +21 more
Magnetic reconnection is a key mechanism involved in solar eruptions and is also a prime possibility to heat the low corona to millions of degrees. Here, we present ultra-high-resolution extreme ultraviolet observations of persistent null-point reconnection in the corona at a scale of about 390 km over one hour observations of the Extreme-Ultravio…
An Hα Impression of Lyα Galaxies at z ≃ 6 with Deep JWST/NIRCam Imaging
Jiang, Linhua; Ning, Yuanhang; Cai, Zheng +3 more
We present a study of seven spectroscopically confirmed (Lyα-emitting) galaxies at redshift z ≃ 6 using the JWST/NIRCam imaging data. These galaxies, with a wide range of Lyα luminosities, were recently observed in a series of NIRCam broad and medium bands. We constrain the rest-frame UV/optical continua and measure the Hα line emission of the gal…
Implications of z ≳ 12 JWST galaxies for galaxy formation at high redshift
Qin, Yuxiang; Balu, Sreedhar; Wyithe, J. Stuart B.
Using a semi-analytic galaxy formation model, we study analogues of eight z ≳ 12 galaxies recently discovered by James Webb Space Telescope (JWST). We select analogues from a cosmological simulation with a (311 cMpc)3 volume and an effective particle number of 1012 enabling the resolution of every atomic-cooling galaxy at z ≤…
JWST molecular mapping and characterization of Enceladus' water plume feeding its torus
Villanueva, G. L.; Liuzzi, G.; Stansberry, J. +18 more
Enceladus is a prime target in the search for life in our Solar System, having an active plume that is likely to be connected to a large liquid water sub-surface ocean. Using the sensitive near-infrared spectograph instrument on board the James Webb Space Telescope, we searched for organic compounds and characterized the plume's composition and st…
Precision cosmological constraints on atomic dark matter
Bansal, Saurabh; Barron, Jared; Curtin, David +1 more
Atomic dark matter is a simple but highly theoretically motivated possibility for an interacting dark sector that could constitute some or all of dark matter. We perform a comprehensive study of precision cosmological observables on minimal atomic dark matter, exploring for the first time the full parameter space of dark QED coupling and dark elec…
MIRI/JWST observations reveal an extremely obscured starburst in the z = 6.9 system SPT0311-58
Ilbert, O.; Güdel, M.; Colina, L. +29 more
Luminous infrared starbursts in the early Universe are thought to be the progenitors of massive quiescent galaxies identified at redshifts 2-4. Using the Mid-IRfrared Instrument (MIRI) on board the James Webb Space Telescope (JWST), we present mid-infrared sub-arcsec imaging and spectroscopy of such a starburst: the slightly lensed hyper-luminous …
PHANGS-JWST First Results: The Dust Filament Network of NGC 628 and Its Relation to Star Formation Activity
Sandstrom, Karin M.; Henshaw, Jonathan D.; Kruijssen, J. M. Diederik +36 more
PHANGS-JWST mid-infrared (MIR) imaging of nearby spiral galaxies has revealed ubiquitous filaments of dust emission in intricate detail. We present a pilot study to systematically map the dust filament network (DFN) at multiple scales between 25 and 400 pc in NGC 628. MIRI images at 7.7, 10, 11.3, and 21 µm of NGC 628 are used to generate ma…
Keck Integral-field Spectroscopy of M87 Reveals an Intrinsically Triaxial Galaxy and a Revised Black Hole Mass
Ma, Chung-Pei; Walsh, Jonelle L.; Liepold, Emily R.
The three-dimensional intrinsic shape of a galaxy and the mass of the central supermassive black hole provide key insight into the galaxy's growth history over cosmic time. Standard assumptions of a spherical or axisymmetric shape can be simplistic and can bias the black hole mass inferred from the motions of stars within a galaxy. Here, we presen…
Fractal Aggregates of Submicron-sized Grains in the Young Planet-forming Disk around IM Lup
Ginski, Christian; Tazaki, Ryo; Dominik, Carsten
Despite rapidly growing disk observations, it remains a mystery what primordial dust aggregates look like and what the physical and chemical properties of their constituent grains (monomers) are in young planet-forming disks. Confrontation of models with observations to answer this mystery has been a notorious task because we have to abandon a com…
Sub-millimetre galaxies with Webb. Near-infrared counterparts and multi-wavelength morphology
Brammer, Gabe; Greve, Thomas R.; Gillman, Steven +12 more
We utilised the unprecedented depth and resolution of recent early-release science (ERS) JWST observations to define the near-infrared counterparts of sub-millimetre galaxies (SMGs). We identified 45 SCUBA-2 SMG positions within the Cosmic Evolution Early Release Science (CEERS) survey JWST/NIRCam fields. Through an analysis of multi-wavelength p-…