Search Publications
CLEAR: High-ionization [Ne V] λ3426 Emission-line Galaxies at 1.4 < z < 2.3
Papovich, Casey; Yang, Guang; Finkelstein, Steven L. +13 more
We analyze a sample of 25 [Ne V] (λ3426) emission-line galaxies at 1.4 < z < 2.3 using Hubble Space Telescope/Wide Field Camera 3 G102 and G141 grism observations from the CANDELS Lyα Emission at Reionization (CLEAR) survey. [Ne V] emission probes extremely energetic photoionization (creation potential of 97.11 eV) and is often attributed to…
An ever-present Gaia snail shell triggered by a dark matter wake
Grand, Robert J. J.; Gómez, Facundo A.; van de Voort, Freeke +5 more
We utilize a novel numerical technique to model star formation in cosmological simulations of galaxy formation - called SUPERSTARS - to simulate a Milky Way-like galaxy with ≳108 star particles to study the formation and evolution of out-of-equilibrium stellar disc structures in a full cosmological setting. In the plane defined by the c…
Comparative analysis of atmospheric parameters from high-resolution spectroscopic sky surveys: APOGEE, GALAH, Gaia-ESO
Jofré, Paula; Stringfellow, Guy S.; Mészáros, Szabolcs +5 more
Context. SDSS-IV APOGEE-2, GALAH, and Gaia-ESO are high-resolution, ground-based, multi-object spectroscopic surveys providing fundamental stellar atmospheric parameters and multiple elemental abundance ratios for hundreds of thousands of stars of the Milky Way. Data from these and other surveys contribute to investigations of the history and evol…
Extragalactic fast X-ray transient candidates discovered by Chandra (2014-2022)
Bauer, F. E.; Brandt, W. N.; Xue, Y. Q. +9 more
Context. Extragalactic fast X-ray transients (FXTs) are short flashes of X-ray photons of unknown origin that last a few minutes to hours.
Aims: We extend the previous search for extragalactic FXTs (based on sources in the Chandra Source Catalog 2.0, CSC2) to further Chandra archival data between 2014 and 2022.
Methods: We extracted X-ra…
Direct Observational Evidence of the Multi-scale, Dynamical Mass Accretion Toward a High-mass Star-forming Hub-filament System
Zhang, Yong; Sanhueza, Patricio; Tej, Anandmayee +28 more
There is growing evidence that high-mass star formation and hub-filament systems (HFS) are intricately linked. The gas kinematics along the filaments and the forming high-mass star(s) in the central hub are in excellent agreement with the new generation of global hierarchical high-mass star formation models. In this paper, we present an observatio…
Speckle Interferometry with CMOS Detector
Strakhov, I. A.; Safonov, B. S.; Cheryasov, D. V.
In 2022 we carried out an upgrade of the speckle polarimeter (SPP)—the facility instrument of the 2.5-m telescope of the Caucasian Observatory of the SAI MSU. During the overhaul, CMOS Hamamatsu ORCA-Quest qCMOS C15550-20UP was installed as the main detector, some drawbacks of the previous version of the instrument were eliminated. In this paper, …
The TESS Grand Unified Hot Jupiter Survey. II. Twenty New Giant Planets
Butler, R. Paul; Hellier, Coel; Bieryla, Allyson +84 more
NASA's Transiting Exoplanet Survey Satellite (TESS) mission promises to improve our understanding of hot Jupiters by providing an all-sky, magnitude-limited sample of transiting hot Jupiters suitable for population studies. Assembling such a sample requires confirming hundreds of planet candidates with additional follow-up observations. Here we pr…
Mid-to-late M Dwarfs Lack Jupiter Analogs
Latham, David W.; Berlind, Perry; Calkins, Michael L. +6 more
Cold Jovian planets play an important role in sculpting the dynamical environment in which inner terrestrial planets form. The core accretion model predicts that giant planets cannot form around low-mass M dwarfs, although this idea has been challenged by recent planet discoveries. Here, we investigate the occurrence rate of giant planets around l…
The multiplicity fraction in 202 open clusters from Gaia
Castro-Ginard, A.; Jordi, C.; Casamiquela, L. +7 more
In this study, we estimate the fraction of binaries with high mass ratios for 202 open clusters in the extended solar neighbourhood (closer than 1.5 kpc from the Sun). This is one of the largest homogeneous catalogues of multiplicity fractions in open clusters to date, including the unresolved and total (close-binary) multiplicity fractions of mai…
Herbig Stars
Waters, L. B. F. M.; Brittain, Sean D.; Kamp, Inga +2 more
Herbig Ae/Be stars are young contracting stars on the radiative track in the HR diagram on their way to the main sequence. These stars provide a valuable link between high and low mass stars. Here we review the progress that has been made in our understanding of these fascinating objects and their disks since the last major review on this topic pu…