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Extended Lyman-α emission towards the SPT2349-56 protocluster at z = 4.3
Anguita, Timo; Spilker, Justin; Aravena, Manuel +20 more
Context. Deep spectroscopic surveys with the Atacama Large Millimeter/submillimeter Array (ALMA) have revealed that some of the brightest infrared sources in the sky correspond to concentrations of submillimeter galaxies (SMGs) at high redshift. Among these, the SPT2349-56 protocluster system is amongst the most extreme examples given its high sou…
The GALAH survey: tracing the Milky Way's formation and evolution through RR Lyrae stars
Lewis, Geraint F.; Casey, Andrew R.; Matsunaga, Noriyuki +39 more
Stellar mergers and accretion events have been crucial in shaping the evolution of the Milky Way (MW). These events have been dynamically identified and chemically characterized using red giants and main-sequence stars. RR Lyrae (RRL) variables can play a crucial role in tracing the early formation of the MW since they are ubiquitous, old (t ≥ 10 …
ALMA Lensing Cluster Survey: Full Spectral Energy Distribution Analysis of z ∼ 0.5–6 Lensed Galaxies Detected with millimeter Observations
Koekemoer, Anton M.; Smail, Ian; Fujimoto, Seiji +17 more
Sub/millimeter galaxies are a key population for the study of galaxy evolution because the majority of star formation at high redshifts occurred in galaxies deeply embedded in dust. To search for this population, we have performed an extensive survey with Atacama Large Millimeter/submillimeter Array (ALMA), called the ALMA Lensing Cluster Survey (…
Planetary nebulae seen with TESS: New and revisited short-period binary central star candidates from Cycles 1 to 4
Jones, David; Lillo-Box, Jorge; Aller, Alba
Context. High-precision and high-cadence photometric surveys such as Kepler or TESS are making huge progress not only in the detection of new extrasolar planets but also in the study of a great number of variable stars. This is the case for central stars of planetary nebulae (PNe), which have similarly benefited from the capabilities of these miss…
Internal magnetic field structures observed by PSP/WISPR in a filament-related coronal mass ejection
Temmer, M.; Veronig, A. M.; Bothmer, V. +7 more
Context. We investigated the coronal mass ejection (CME) related to an eruptive filament over the southwestern solar limb on December 8, 2022, at around 8 UT. We tracked localized density enhancements reflecting the magnetic structures using white-light data taken with the Wide-field Instrument for Solar PRobe (WISPR) aboard the Parker Solar Probe…
Exploring the origin of the distance bimodality of stars in the periphery of the Small Magellanic Cloud with APOGEE and Gaia
Monachesi, Antonela; Choi, Yumi; Majewski, Steven R. +12 more
The Magellanic Cloud system represents a unique laboratory for study of both interacting dwarf galaxies and the ongoing process of the formation of the Milky Way and its halo. We focus on one aspect of this complex, three-body interaction - the dynamical perturbation of the Small Magellanic Cloud (SMC) by the Large Magellanic Cloud (LMC), and spec…
A Quick Guide to Nearby Young Associations
Gagné, Jonathan
Nearby associations of stars which are coeval are important benchmark laboratories because they provide robust measurements of stellar ages. The study of such coeval groups makes it possible to better understand star formation by studying the initial mass function, the binary fraction or the circumstellar disks of stars, to determine how the initi…
Galaxy kinematics and mass estimates at z 1 from ionized gas and stars
Übler, Hannah; D'Eugenio, Francesco; Straatman, Caroline M. S. +14 more
We compare ionized gas and stellar kinematics of 16 star-forming galaxies (log (M⋆/M⊙) = 9.7-11.2, SFR =6 - 86 M⊙ yr-1) at z ~ 1 using near-infrared integral field spectroscopy (IFS) of Hα emission from the KMOS3D (the K-band Multi-Object Spectrograph 3D) survey and optical slit spectroscopy o…
White dwarf pollution: one star or two?
Toonen, Silvia; Hollands, Mark; Farihi, Jay +1 more
The accretion of tidally disrupted planetary bodies is the current consensus model for the presence of photospheric metals commonly detected in white dwarfs. While most dynamical studies have considered a single star and associated planetary instabilities, several investigations have instead considered the influence of widely bound stellar compani…
Physical Properties of Hyperluminous, Dust-obscured Quasars at z ∼ 3: Multiwavelength Spectral Energy Distribution Analysis and Cold Gas Content Revealed by ALMA
Chen, Guangwen; Knudsen, Kirsten K.; Zhang, Hong-Xin +3 more
We present a UV to millimeter spectral energy distribution (SED) analysis of 16 hyperluminous, dust-obscured quasars at z ∼ 3, selected by the Wide-field Infrared Survey Explorer. We aim to investigate the physical properties of these quasars, with a focus on their molecular gas content. We decompose the SEDs into three components: stellar, cold d…