Search Publications
Cosmic Evolution of Gas and Star Formation
Staguhn, Johannes; Mobasher, Bahram; Capak, Peter +20 more
Atacama Large Millimeter/submillimeter Array (ALMA) observations of the long-wavelength dust continuum are used to estimate the gas masses in a sample of 708 star-forming galaxies at z = 0.3-4.5. We determine the dependence of gas masses and star formation efficiencies (SFEs; SFR per unit gas mass) on redshift (z), M *, and star formati…
Observable Signatures of Stellar-mass Black Holes in Active Galactic Nuclei
Perna, Rosalba; Tagawa, Hiromichi; Kimura, Shigeo S. +2 more
Stellar-mass black holes (BHs) are predicted to be embedded in the disks of active galactic nuclei (AGNs) due to gravitational drag and in situ star formation. However, clear evidence for AGN disk-embedded BHs is currently lacking. Here, as possible electromagnetic signatures of these BHs, we investigate breakout emission from shocks emerging arou…
The Planck clusters in the LOFAR sky. III. LoTSS-DR2: Dynamic states and density fluctuations of the intracluster medium
Simionescu, A.; Kaastra, J. S.; Zhang, X. +19 more
Context. The footprint of the recent second data release of the LOFAR Two-metre Sky Survey (LoTSS-DR2) covers 309 Planck Sunyaev-Zeldovich (SZ) selected galaxy clusters, 83 of which host a radio halo and 26 host a radio relic(s). It provides an excellent opportunity to statistically study the properties of extended cluster radio sources, especiall…
The Enhanced Resolution Imager and Spectrograph for the VLT
Lutz, D.; Förster Schreiber, N. M.; Genzel, R. +82 more
The Enhanced Resolution Imager and Spectrograph (ERIS) is an instrument that both extends and enhances the fundamental diffraction limited imaging and spectroscopy capability for the VLT. It replaces two instruments that were being maintained beyond their operational lifetimes, combines their functionality on a single focus, provides a new wavefro…
Rotation and interaction of the CMEs of September 8 and 10, 2014, tested with EUHFORIA
Poedts, Stefaan; Scolini, Camilla; Schmieder, Brigitte +1 more
Context. Solar coronal mass ejections (CMEs) can catch up and interact with preceding CMEs and solar wind structures to undergo rotation and deflection during their propagation. Aim. We aim to show how the interactions of a CME in the corona and heliosphere can play a significant role in altering its geoeffectiveness as predicted at the time of it…
A mini-chemical scheme with net reactions for 3D general circulation models. II. 3D thermochemical modelling of WASP-39b and HD 189733b
Hammond, Mark; Lee, Elspeth K. H.; Tan, Xianyu +1 more
Context. The chemical inventory of hot Jupiter (HJ) exoplanet atmospheres continues to be observed by various ground- and space-based instruments in increasing detail and precision. It is expected for some HJs to exhibit strong non-equilibrium chemistry characteristics in their atmospheres, which might be inferred from spectral observations.
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Metallicity and age effects on lithium depletion in solar analogues
Meléndez, Jorge; Rathsam, Anne; Martos, Giulia +1 more
The lithium present in the photospheres of solar-type stars is transported to the inner parts by convection, reaching regions even somewhat below the convection zone, by non-standard transport mechanisms. In stars with deeper convective zones, this element can reach regions with temperatures sufficient enough to be destroyed, implying in a lower L…
The obscured nucleus and shocked environment of VV 114E revealed by JWST/MIRI spectroscopy
Hernán-Caballero, A.; Rigopoulou, D.; Pereira-Santaella, M. +5 more
Compact Obscured Nuclei (CONs) potentially hide extreme supermassive black hole (SMBH) growth behind large column densities of gas/dust. We present a spectroscopic analysis of the heavily obscured nucleus and the surrounding environment of the eastern region of the nearby (z = 0.02007) interacting galaxy VV 114 with the JWST Mid-InfraRed Instrumen…
GHOST Commissioning Science Results: Identifying a New Chemically Peculiar Star in Reticulum II
Simpson, Chris; Hayes, Christian R.; Sestito, Federico +80 more
The Gemini High-resolution Optical SpecTrograph (GHOST) is the newest high-resolution spectrograph to be developed for a large-aperture telescope, recently deployed and commissioned at the Gemini-South telescope. In this paper, we present the first science results from the GHOST spectrograph taking during its commissioning runs. We have observed t…
Clouds form on the hot Saturn JWST ERO target WASP-96b
Helling, Ch.; Min, M.; Carone, L. +3 more
Context. WASP-96b is a hot Saturn exoplanet, with an equilibrium temperature of ≈1300 K. This is well within the regime of thermo-dynamically expected extensive cloud formation. Prior observations with Hubble/WFC3, Spitzer/IRAC, and VLT/FORS2 have been combined into a single spectrum for which retrievals suggest a cold but cloud-free atmosphere. R…