Search Publications
Missions
Journals
Publication Years
First asteroseismic analysis of the globular cluster M80: multiple populations and stellar mass-loss
Stello, Dennis; De Silva, Gayandhi M.; Howell, Madeline +1 more
Asteroseismology provides a new avenue for accurately measuring the masses of evolved globular cluster (GC) stars. We present the first detections of solar-like oscillations in 47 red giant branch (RGB) and early asymptotic giant branch (EAGB) stars in the metal-poor GC M80; only the second with measured seismic masses. We investigate two areas of…
Correlation between accretion rate and free-free emission in protoplanetary disks. A multiwavelength analysis of central mm/cm emission in transition disks
van der Marel, N.; van der Tak, F. F. S.; Francis, L. +3 more
Context. The inner regions of protoplanetary disks are believed to be the primary locations of planet formation and the processes that influence the global evolution of the disk, such as magnetohydrodynamic winds and photoevaporation. Transition disks with large inner dust cavities are ideal targets for studying the inner regions (of tens of au) o…
Imaging dark matter at the smallest scales with z ≈ 1 lensed stars
Koekemoer, Anton M.; Treu, Tommaso; Filippenko, Alexei V. +19 more
Recent observations of caustic-crossing galaxies at redshift 0.7 ≲ z ≲ 1 show a wealth of transient events. Most of them are believed to be microlensing events of highly magnified stars. Earlier work predicts such events should be common near the critical curves (CCs) of galaxy clusters ("near region"), but some are found relatively far away from …
The metal-poor edge of the Milky Way's "thin disc"
Sestito, Federico; Martin, Nicolas; Kordopatis, Georges +9 more
Context. The emergence of the disc in our Galaxy and the relation between thick and thin disc formation and evolution is still a matter of debate. The chemo-dynamical characterization of disc stars is key to resolving this question, particularly at parameter regimes, where both disc components overlap, such as the region around [Fe/H] ∼ −0.7 corre…
CEERS: 7.7 µm PAH Star Formation Rate Calibration with JWST MIRI
Papovich, Casey; Yang, Guang; Finkelstein, Steven L. +33 more
We test the relationship between UV-derived star formation rates (SFRs) and the 7.7 µm polycyclic aromatic hydrocarbon luminosities from the integrated emission of galaxies at z ∼ 0–2. We utilize multiband photometry covering 0.2–160 µm from the Hubble Space Telescope, CFHT, JWST, Spitzer, and Herschel for galaxies in the Cosmic Evolut…
On the Pair-instability Supernova Origin of J1010+2358
Aguado, David S.; Lucchesi, Romain; Amarsi, Anish M. +4 more
The first (Population III) stars formed only out of H and He and were likely more massive than present-day stars. Massive Population III stars in the range 140–260 M ⊙ are predicted to end their lives as pair-instability supernovae (PISNe), enriching the environment with a unique abundance pattern, with high ratios of odd to even elemen…
JWST Observations of Starbursts: Polycyclic Aromatic Hydrocarbon Emission at the Base of the M82 Galactic Wind
Boogaard, Leindert A.; Meier, David S.; Böker, Torsten +37 more
We present new observations of the central 1 kpc of the M82 starburst obtained with the James Webb Space Telescope near-infrared camera instrument at a resolution θ ∼ 0.″05–0.″1 (∼1–2 pc). The data comprises images in three mostly continuum filters (F140M, F250M, and F360M), and filters that contain [Fe II] (F164N), H2 v = 1 → 0 (F212N)…
ω Centauri: a MUSE discovery of a counter-rotating core
Pechetti, Renuka; Weilbacher, Peter M.; Krajnović, Davor +7 more
ω Centauri is considered the most massive globular cluster of the Milky Way and likely the former nuclear star cluster of a Galaxy accreted by the Milky Way. It is speculated to contain an intermediate-mass black hole (IMBH) from several dynamical models. However, uncertainties regarding the location of the cluster centre or the retention of stell…
Probing the Galactic halo with RR Lyrae stars - V. Chemistry, kinematics, and dynamically tagged groups
Liu, Gaochao; Huang, Yang; Beers, Timothy C. +9 more
We employ a sample of 135 873 RR Lyrae stars (RRLs) with precise photometric-metallicity and distance estimates from the newly calibrated P-ϕ31-R21-[Fe/H] and Gaia G band P-R21-[Fe/H] absolute magnitude-metallicity relations of Li et al., combined with available proper motions from Gaia EDR3, and 6955 systemic radi…
Searching for Giant Exoplanets around M-dwarf Stars (GEMS) I: Survey Motivation
Cochran, William D.; Mahadevan, Suvrath; Teske, Johanna +13 more
Recent discoveries of transiting giant exoplanets around M-dwarf stars (GEMS), aided by the all-sky coverage of TESS, are starting to stretch theories of planet formation through the core-accretion scenario. Recent upper limits on their occurrence suggest that they decrease with lower stellar masses, with fewer GEMS around lower-mass stars compare…