Search Publications
Sensitivities on nonspinning and spinning primordial black hole dark matter with global 21-cm troughs
Laha, Ranjan; Saha, Akash Kumar
Detection of the global 21 cm signal arising from neutral hydrogen can revolutionize our understanding of the standard evolution of the Universe after recombination. In addition, it can also be an excellent probe of dark matter (DM). Among all the DM candidates, primordial black holes (PBHs) are one of the most well motivated. Hawking emission fro…
Evidence from Disrupted Halo Dwarfs that r-process Enrichment via Neutron Star Mergers is Delayed by ≳500 Myr
Conroy, Charlie; Ting, Yuan-Sen; Caldwell, Nelson +10 more
The astrophysical origins of r-process elements remain elusive. Neutron star mergers (NSMs) and special classes of core-collapse supernovae (rCCSNe) are leading candidates. Due to these channels' distinct characteristic timescales (rCCSNe: prompt, NSMs: delayed), measuring r-process enrichment in galaxies of similar mass but differing star formati…
Diurnal variations in the stratosphere of the ultrahot giant exoplanet WASP-121b
Mikal-Evans, Thomas; Sing, David K.; Wakeford, Hannah R. +9 more
The temperature profile of a planetary atmosphere is a key diagnostic of radiative and dynamical processes governing the absorption, redistribution and emission of energy. Observations have revealed dayside stratospheres that either cool1,2 or warm3,4 with altitude for a small number of gas giant exoplanets, whereas other day…
Early Results from GLASS-JWST. II. NIRCam Extragalactic Imaging and Photometric Catalog
Santini, Paola; Calabrò, Antonello; Castellano, Marco +26 more
We present the reduced images and multiwavelength catalog of the first JWST NIRCam extragalactic observations from the GLASS Early Release Science Program, obtained as coordinated parallels of the NIRISS observations of the Abell 2744 cluster. Images in seven bands (F090W, F115W, F150W, F200W, F277W, F356W, and F444W) have been reduced using an au…
The European Solar Telescope
Heinzel, P.; Strassmeier, K. G.; Schmidt, W. +278 more
The European Solar Telescope (EST) is a project aimed at studying the magnetic connectivity of the solar atmosphere, from the deep photosphere to the upper chromosphere. Its design combines the knowledge and expertise gathered by the European solar physics community during the construction and operation of state-of-the-art solar telescopes operati…
The California Legacy Survey. III. On the Shoulders of (Some) Giants: The Relationship between Inner Small Planets and Outer Massive Planets
Henry, Gregory W.; Knutson, Heather A.; Kane, Stephen R. +11 more
We use a high-precision radial velocity survey of FGKM stars to study the conditional occurrence of two classes of planets: close-in small planets (0.023-1 au, 2-30 M ⊕) and distant giant planets (0.23-10 au, 30-6000 M ⊕). We find that ${41}_{-13}^{+15} \% $ of systems with a close-in, small planet also host an outer giant, c…
All-purpose, all-sky photometric redshifts for the Legacy Imaging Surveys Data Release 8
Duncan, Kenneth J.
In this paper, we present photometric redshift (photo-z) estimates for the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys, currently the most sensitive optical survey covering the majority of the extragalactic sky. Our photo-z methodology is based on a machine-learning approach, using sparse Gaussian processes augmented with Ga…
CLASSY III. The Properties of Starburst-driven Warm Ionized Outflows
Ouchi, Masami; Kewley, Lisa J.; Martin, Crystal L. +18 more
We report the results of analyses of galactic outflows in a sample of 45 low-redshift starburst galaxies in the COS Legacy Archive Spectroscopic SurveY (CLASSY), augmented by five additional similar starbursts with Cosmic Origins Spectrograph (COS) data. The outflows are traced by blueshifted absorption lines of metals spanning a wide range of ion…
A black hole detected in the young massive LMC cluster NGC 1850
Dreizler, S.; Da Costa, G. S.; Cabrera-Ziri, I. +8 more
We report on the detection of a black hole (NGC 1850 BH1) in the ~100-Myr-old massive cluster NGC 1850 in the Large Magellanic Cloud. It is in a binary system with a main-sequence turn-off star (4.9 ± 0.4 M⊙), which is starting to fill its Roche lobe and is becoming distorted. Using 17 epochs of Very Large Telescope/Multi-Unit Spectrosc…
The protoplanetary disk population in the ρ-Ophiuchi region L1688 and the time evolution of Class II YSOs
Lodato, G.; Pascucci, I.; Testi, L. +10 more
Context. Planets form during the first few Myr of the evolution of the star-disk system, possibly before the end of the embedded phase. The properties of very young disks and their subsequent evolution reflect the presence and properties of their planetary content.
Aims: We present a study of the Class II/F disk population in L1688, the dense…