Search Publications
The hydrostatic-to-lensing mass bias from resolved X-ray and optical-IR data
Macías-Pérez, J. F.; Perotto, L.; Pointecouteau, E. +11 more
An accurate reconstruction of galaxy cluster masses is key to use this population of objects as a cosmological probe. In this work we present a study on the hydrostatic-to-lensing mass scaling relation for a sample of 53 clusters whose masses were reconstructed homogeneously in a redshift range between z = 0.05 and 1.07. The M500 mass f…
Unveiling the ice and gas nature of active centaur (2060) Chiron using the James Webb Space Telescope
Villanueva, G. L.; Lunine, J. I.; Stansberry, J. +15 more
Context. (2060) Chiron is a large centaur that has been reported active on multiple occasions at relatively large heliocentric distances, including during aphelion passage. Studies of Chiron's coma during active periods have resulted in the detection of C≡N and CO outgassing. Additionally, Chiron is surrounded by a disk of debris that varies with …
Exploring X-Ray Properties of Low-metallicity Dwarf Galaxies
Satyapal, Shobita; Pfeifle, Ryan W.; Secrest, Nathan J. +3 more
One of the primary outstanding questions in extragalactic astronomy is the formation and early evolution of the supermassive black holes that are seen in nearly every massive galaxy. Low-metallicity dwarf galaxies may offer the most representative local analogs to pristine early galaxies, making them a vital tool in probing black hole seed models …
JWST/NIRCam Narrowband Survey of Paβ Emitters in the Spiderweb Protocluster at z = 2.16
Pérez-González, Pablo G.; Koyama, Yusei; Kodama, Tadayuki +7 more
We report the initial result of our Paβ narrowband imaging on a protocluster with the JWST Near Infrared Camera (NIRCam). As NIRCam enables deep narrowband imaging of rest-frame near-infrared lines at z > 1, we target one of the most studied protoclusters, the Spiderweb protocluster at z = 2.16, in which previous studies have confirmed more tha…
3D-DASH: The Evolution of Size, Shape, and Intrinsic Scatter in Populations of Young and Old Quiescent Galaxies at 0.5 < z < 3
Franx, Marijn; van Dokkum, Pieter; van der Wel, Arjen +13 more
We present a study of the growth of the quiescent galaxy population between 0.5 < z < 3 by tracing the number density and structural evolution of a sample of 4518 old and 583 young quiescent galaxies with log(M ⋆/M ⊙) > 10.4, selected from the COSMOS2020 catalog with complementary Hubble Space Telescope F160W imaging…
Gaia Focused Product Release: A catalogue of sources around quasars to search for strongly lensed quasars
Prusti, T.; Mazeh, T.; Zucker, S. +398 more
Context. Strongly lensed quasars are fundamental sources for cosmology. The Gaia space mission covers the entire sky with the unprecedented resolution of 0.18″ in the optical, making it an ideal instrument to search for gravitational lenses down to the limiting magnitude of 21. Nevertheless, the previous Gaia Data Releases are known to be incomple…
Polarized Light from Massive Protoclusters (POLIMAP). I. Dissecting the Role of Magnetic Fields in the Massive Infrared Dark Cloud G28.37+0.07
Caselli, Paola; Law, Chi-Yan; Henshaw, Jonathan D. +11 more
Magnetic fields may play a crucial role in setting the initial conditions of massive star and star cluster formation. To investigate this, we report SOFIA-HAWC+ 214 µm observations of polarized thermal dust emission and high-resolution GBT-Argus C18O(1-0) observations toward the massive Infrared Dark Cloud (IRDC) G28.37+0.07. Cons…
CLusters in the Uv as EngineS (CLUES). II. Subkiloparsec-scale Outflows Driven by Stellar Feedback
Hayes, Matthew; Chisholm, John; Östlin, Göran +17 more
We analyze the far-ultraviolet (1130‑1770 Å rest frame) spectroscopy of 20 young (<50 Myr) and massive (>104 M ⊙) star clusters (YSCs) in 11 nearby star-forming galaxies. We probe the interstellar gas intervening along the line of sight, detecting several metal absorption lines of a wide range of ionization potentials, …
Exploring the dependence of chemical traits on metallicity. Chemical trends for red giant stars with asteroseismic ages
Casamiquela, L.; Winther, M. L.; Blanco-Cuaresma, S. +5 more
Context. Given the massive spectroscopic surveys and the Gaia mission, the Milky Way has turned into a unique laboratory to be explored using abundance ratios that show a strong dependence on time. Within this framework, the data provided through asteroseismology serve as a valuable complement. Even so, it has been demonstrated that chemical trait…
Multi-year characterisation of the broad-band emission from the intermittent extreme BL Lac 1ES 2344+514
Covino, S.; Antonelli, L. A.; D'Elia, V. +238 more
Aims: The BL Lac 1ES 2344+514 is known for temporary extreme properties characterised by a shift of the synchrotron spectral energy distribution (SED) peak energy νsynch, p above 1 keV. While those extreme states have only been observed during high flux levels thus far, additional multi-year observing campaigns are required to achi…