Search Publications
The sizes of bright Lyman-break galaxies at z ≃ 3-5 with JWST PRIMER
Bowler, R. A. A.; Dunlop, J. S.; Koekemoer, A. M. +8 more
We use data from the JWST Public Release IMaging for Extragalactic Research survey to measure the size scaling relations of 1668 rest-frame UV-bright Lyman-break galaxies (LBGs) at
Estimating the absolute parameters of W UMa-type binary stars using Gaia DR3 parallax
Poro, Atila; Nourmohammad, Mahshid; Hedayatjoo, Mahya +7 more
The accuracy of absolute parameters' estimation in contact binary systems is important for investigating their evolution and solving some challenges. The Gaia DR3 parallax is one of the methods used for estimating the absolute parameters, in cases where photometric data is the only one that is available. The use of this method includes advantages …
Feedback and ionized gas outflows in four low-radio power AGN at z ∼ 0.15
Maiolino, R.; Treister, E.; Tomicic, N. +19 more
An increasing number of observations and simulations suggests that low-power (< 1044 erg s−1) jets may be a significant channel of feedback produced by active galactic nuclei (AGN), but little is known about their actual effect on their host galaxies from the observational point of view. We targeted four luminous type 2 AG…
Most nearby young star clusters formed in three massive complexes
Reffert, Sabine; Meingast, Stefan; Alves, João +9 more
Efforts to unveil the structure of the local interstellar medium and its recent star-formation history have spanned the past 70 years (refs. 1-6). Recent studies using precise data from space astrometry missions have revealed nearby, newly formed star clusters with connected origins7-12. Nonetheless, mapping young clusters ac…
Spectroscopic Confirmation of an Ultra-Massive Galaxy in a Protocluster at z ∼ 4.9
Cooper, M. C.; Urbano Stawinski, Stephanie M.; Muzzin, Adam +8 more
We present spectroscopic confirmation of an ultra-massive galaxy (UMG) with log(M⋆/M⊙)=10.98±0.07 at zspec=4.8947 in the Extended Groth Strip (EGS), based on deep observations of Ly α emission with Keck/DEIMOS. The ultra-massive galaxy (UMG-28740) is the most massive member in one of the most significant overdensities in the EGS, with four additio…
Magnetic Reconnection at Planetary Bodies and Astrospheres
Stawarz, Julia E.; Phan, Tai D.; Harada, Yuki +11 more
Magnetic reconnection is a fundamental mechanism for the transport of mass and energy in planetary magnetospheres and astrospheres. While the process of reconnection is itself ubiquitous across a multitude of systems, the techniques used for its analysis can vary across scientific disciplines. Here we frame the latest understanding of reconnection…
Chemical Diversity on Small Scales: Abundance Analysis of the Tucana V Ultrafaint Dwarf Galaxy
Li, Ting S.; Hansen, Terese T.; Simon, Joshua D. +5 more
The growing number of Milky Way satellites detected in recent years has introduced a new focus for stellar abundance analysis. Abundances of stars in satellites have been used to probe the nature of these systems and their chemical evolution. However, for most satellites, only centrally located stars have been examined. This paper presents an anal…
Hidden Gems on a Ring: Infant Massive Clusters and Their Formation Timeline Unveiled by ALMA, HST, and JWST in NGC 3351
Wilson, Christine D.; Bolatto, Alberto D.; Henshaw, Jonathan D. +38 more
We use 0.1″ observations from the Atacama Large Millimeter Array (ALMA), Hubble Space Telescope (HST), and JWST to study young massive clusters (YMCs) in their embedded "infant" phase across the central starburst ring in NGC 3351. Our new ALMA data reveal 18 bright and compact (sub-)millimeter continuum sources, of which 8 have counterparts in JWS…
Did the Gaia Enceladus/Sausage merger form the Milky Way's bar?
Grand, Robert J. J.; Fragkoudi, Francesca; Merrow, Alex +1 more
The Milky Way's last significant merger, the Gaia Enceladus/Sausage (GES), is thought to have taken place between $8\hbox{ and }11\, \mathrm{Gyr}$ ago. Recent studies in the literature suggest that the bar of the Milky Way is rather old, indicating that it formed at a similar epoch to the GES merger. We investigate the possible link between these …
The photospheres of the hottest fastest stars in the Galaxy
El-Badry, Kareem; Rauch, Thomas; Werner, Klaus +2 more
We perform nonlocal thermodynamic equilibrium (NLTE) model atmosphere analyses of the three hottest hypervelocity stars (space velocities between ≈1500-2800 km s−1) known to date, which were recently discovered spectroscopically and identified as runaways from Type Ia supernovae. The hottest of the three (J0546+0836, effective temperatu…