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The Empirical Limits of Gyrochronology
Bouma, Luke G.; Hillenbrand, Lynne A.; Palumbo, Elsa K.
The promise of gyrochronology is that, given a star's rotation period and mass, its age can be inferred. The reality of gyrochronology is complicated by effects other than ordinary magnetized braking that alter stellar rotation periods. In this work, we present an interpolation-based gyrochronology framework that reproduces the time- and mass-depe…
The LOFAR Two-Metre Sky Survey. VI. Optical identifications for the second data release
Prandoni, I.; Shimwell, T. W.; Vaccari, M. +49 more
The second data release of the LOFAR Two-Metre Sky Survey (LoTSS) covers 27% of the northern sky, with a total area of ~5700 deg1. The high angular resolution of LOFAR with Dutch baselines (6 arcsec) allows us to carry out optical identifications of a large fraction of the detected radio sources without further radio followup; however, …
Gas phase Elemental abundances in Molecular cloudS (GEMS). VII. Sulfur elemental abundance
Bachiller, R.; Gerin, M.; Goicoechea, J. R. +18 more
Context. Gas phase Elemental abundances in molecular CloudS (GEMS) is an IRAM 30-m Large Program aimed at determining the elemental abundances of carbon (C), oxygen (O), nitrogen (N), and sulfur (S) in a selected set of prototypical star-forming filaments. In particular, the elemental abundance of S remains uncertain by several orders of magnitude…
Spatial variations in aromatic hydrocarbon emission in a dust-rich galaxy
Hutchison, Taylor A.; Rigby, Jane R.; Whitaker, Katherine E. +36 more
Dust grains absorb half of the radiation emitted by stars throughout the history of the universe, re-emitting this energy at infrared wavelengths1-3. Polycyclic aromatic hydrocarbons (PAHs) are large organic molecules that trace millimetre-size dust grains and regulate the cooling of interstellar gas within galaxies4,5. Obser…
The Gas and Stellar Content of a Metal-poor Galaxy at z = 8.496 as Revealed by JWST and ALMA
Schaerer, D.; Magdis, G. E.; Bauer, F. E. +27 more
We present a joint analysis of the galaxy S04590 at z = 8.496 based on NIRSpec, NIRCam, and NIRISS observations obtained as part of the Early Release Observations program of the James Webb Space Telescope (JWST) and the far-infrared [C II] 158 µm emission line detected by dedicated Atacama Large Millimeter/submillimeter Array (ALMA) observat…
Observations of the planetary nebula SMP LMC 058 with the JWST MIRI medium resolution spectrometer
Fox, O. D.; Kavanagh, P. J.; Larson, Kirsten L. +21 more
During the commissioning of JWST, the medium-resolution spectrometer (MRS) on the mid-infrared instrument (MIRI) observed the planetary nebula SMP LMC 058 in the Large Magellanic Cloud. The MRS was designed to provide medium resolution (R = λ/Δλ) 3D spectroscopy in the whole MIRI range. SMP LMC 058 is the only source observed in JWST commissioning…
Astrometric Accelerations as Dynamical Beacons: A Giant Planet Imaged inside the Debris Disk of the Young Star AF Lep
Jensen-Clem, Rebecca; Crepp, Justin R.; Zhou, Yifan +13 more
We present the direct-imaging discovery of a giant planet orbiting the young star AF Lep, a 1.2 M ⊙ member of the 24 ± 3 Myr β Pic moving group. AF Lep was observed as part of our ongoing high-contrast imaging program targeting stars with astrometric accelerations between Hipparcos and Gaia that indicate the presence of substellar compa…
MUSE Analysis of Gas around Galaxies (MAGG) - IV. The gaseous environment of z 3-4 Ly α emitting galaxies
Prochaska, J. Xavier; Murphy, Michael T.; Fumagalli, Michele +9 more
We study the link between galaxies and H I-selected absorption systems at z ~ 3-4 in the MUSE Analysis of Gas around Galaxies (MAGG) survey, an ESO large programme consisting of integral field spectroscopic observations of 28 quasar fields hosting 61 strong absorbers with $\rm N_{\rm H\,{\small I}}\gtrsim 10^{16.5}~\rm cm^{-2}$. We identify 127 Ly…
An extremely metal-poor star complex in the reionization era: Approaching Population III stars with JWST
Dickinson, M.; Zanella, A.; Bradač, M. +32 more
We present JWST/Near Infrared Spectrograph (NIRSpec) integral field spectroscopy (IFS) of a lensed Population III candidate stellar complex (dubbed Lensed And Pristine 1, LAP1), with a lensing-corrected stellar mass of ≲104 M⊙ and an absolute luminosity of MUV > −11.2 (mUV > 35.6), confirmed at red…
Putting all the X in one basket: Updated X-ray constraints on sub-GeV Dark Matter
Pinetti, Elena; Fornengo, Nicolao; Cirelli, Marco +2 more
Sub-GeV dark matter particles can annihilate or decay producing e ± pairs which upscatter the low-energy photon fields in the Galaxy and generate an X-ray emission (via the Inverse Compton effect). Using X-ray data from XMM-NEWTON, INTEGRAL, NUSTAR and SUZAKU, we derive new constraints on this class of dark matter (DM). In the annihilat…