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Gaia Data Release 3. A golden sample of astrophysical parameters
Prusti, T.; Mazeh, T.; Zucker, S. +446 more
Context.Gaia Data Release 3 (DR3) provides a wealth of new data products for the astronomical community to exploit, including astrophysical parameters for half a billion stars. In this work, we demonstrate the high quality of these data products and illustrate their use in different astrophysical contexts.
Aims: We produce homogeneous samples…
Precision Modeling of JWST's First Cluster Lens SMACS J0723.3-7327
Mahler, Guillaume; Richard, Johan; Kneib, Jean-Paul +12 more
Exploiting the fundamentally achromatic nature of gravitational lensing, we present a lens model for the massive galaxy cluster SMACS J0723.3-7323 (SMACS J0723; z = 0.388) that significantly improves upon earlier work. Building on strong-lensing constraints identified in prior Hubble Space Telescope (HST) observations, the mass model utilizes 21 m…
Sizes and Mass Profiles of Candidate Massive Galaxies Discovered by JWST at 7 < z < 9: Evidence for Very Early Formation of the Central 100 pc of Present-day Ellipticals
Labbé, Ivo; van Dokkum, Pieter; Bezanson, Rachel +8 more
The first JWST data revealed an unexpected population of red galaxies that appear to have redshifts of z ~ 7-9 and high masses of M * ≳ 1010 M ☉. Here we fit Sérsic profiles to the F200W NIRCam images of the 13 massive galaxy candidates of Labbé et al., to determine their structural parameters. Satisfactory fits we…
Far-ultraviolet to Near-infrared Observations of SN 2023ixf: A High-energy Explosion Engulfed in Complex Circumstellar Material
Kawabata, Koji S.; Pathak, Utkarsh; Kumar, Brajesh +13 more
We present early-phase panchromatic photometric and spectroscopic coverage spanning the far-ultraviolet to near-infrared regime of the nearest hydrogen-rich core-collapse supernova (SN) in the last 25 yr, SN 2023ixf. We observe early "flash" features in the optical spectra due to confined dense circumstellar material (CSM). We observe high-ionizat…
Free-floating Planet Mass Function from MOA-II 9 yr Survey toward the Galactic Bulge
Fukui, Akihiko; Sumi, Takahiro; Bond, Ian A. +25 more
We present the first measurement of the mass function of free-floating planets (FFPs), or very wide orbit planets down to an Earth mass, from the MOA-II microlensing survey in 2006-2014. Six events are likely to be due to planets with Einstein radius crossing times t E < 0.5 days, and the shortest has t E = 0.057 ± 0.016 d…
Early Results From GLASS-JWST. XII. The Morphology of Galaxies at the Epoch of Reionization
Vulcani, B.; Treu, T.; Castellano, M. +23 more
Star-forming galaxies can exhibit strong morphological differences between the rest-frame far-UV and optical, reflecting inhomogeneities in star formation and dust attenuation. We exploit deep, high-resolution, NIRCAM seven-band observations to take a first look at the morphology of galaxies in the epoch of reionization (z > 7), and its variati…
Water in the terrestrial planet-forming zone of the PDS 70 disk
Waters, L. B. F. M.; Olofsson, G.; Abergel, A. +42 more
Terrestrial and sub-Neptune planets are expected to form in the inner (less than 10 AU) regions of protoplanetary disks1. Water plays a key role in their formation2-4, although it is yet unclear whether water molecules are formed in situ or transported from the outer disk5,6. So far Spitzer Space Telescope observat…
Bubbles and outflows: The novel JWST/NIRSpec view of the z = 1.59 obscured quasar XID2028
Marconi, A.; Capetti, A.; Brusa, M. +20 more
Quasar feedback in the form of powerful outflows is invoked as a key mechanism to quench star formation in galaxies, although direct observational evidence is still scarce and debated. Here we present Early Release Science JWST NIRSpec IFU observations of the z = 1.59 prototypical obscured Active Galactic Nucleus (AGN) XID2028: This target represe…
Updated constraints from the effective field theory analysis of the BOSS power spectrum on early dark energy
Poulin, Vivian; Smith, Tristan L.; Simon, Théo +1 more
Analyses of the full shape of the Baryon Oscillation Spectroscopic Survey (BOSS) DR12 power spectrum using the one-loop prediction from the effective field theory of large-scale structures (EFTBOSS) have led to new constraints on extensions to the Λ cold dark matter model, such as early dark energy (EDE), which has been suggested as a resolution t…
Close encounters: How stellar flybys shape planet-forming discs
Ménard, François; Price, Daniel J.; Cuello, Nicolás
We review the role of stellar flybys and encounters in shaping planet-forming discs around young stars, based on the published literature on this topic in the last 30 years. Since most stars