Search Publications
Bipolar outflows out to 10 kpc for massive galaxies at redshift z ≈ 1
Bacon, Roland; Blaizot, Jérémy; Boogaard, Leindert A. +15 more
Galactic outflows are believed to play a critical role in the evolution of galaxies by regulating their mass build-up and star formation1. Theoretical models assume bipolar shapes for the outflows that extend well into the circumgalactic medium (CGM), up to tens of kiloparsecs (kpc) perpendicular to the galaxies. They have been directly…
A wide-field view on multiple stellar populations in 28 Milky Way globular clusters
Cabrera-Ziri, I.; Pancino, E.; Hilker, M. +2 more
The majority of Galactic globular clusters (GCs) contain multiple stellar populations displaying specific chemical abundance variations. In particular, GCs generally contain a 'primordial' population with abundances similar to field stars, along with an 'enriched' population exhibiting light element anomalies. In this paper, we present a homogeneo…
Abell 1201: detection of an ultramassive black hole in a strong gravitational lens
Edge, Alastair C.; Lucey, John R.; Amvrosiadis, Aristeidis +9 more
Supermassive black holes (SMBHs) are a key catalyst of galaxy formation and evolution, leading to an observed correlation between SMBH mass MBH and host galaxy velocity dispersion σe. Outside the local Universe, measurements of MBH are usually only possible for SMBHs in an active state: limiting sample size and int…
A JWST Near- and Mid-infrared Nebular Spectrum of the Type Ia Supernova 2021aefx
Temim, Tea; Foley, Ryan J.; Rest, Armin +55 more
We present JWST near-infrared (NIR) and mid-infrared (MIR) spectroscopic observations of the nearby normal Type Ia supernova (SN) SN 2021aefx in the nebular phase at +255 days past maximum light. Our Near Infrared Spectrograph (NIRSpec) and Mid Infrared Instrument observations, combined with ground-based optical data from the South African Large T…
CLASSY VII Lyα Profiles: The Structure and Kinematics of Neutral Gas and Implications for LyC Escape in Reionization-era Analogs
Martin, Crystal L.; Brinchmann, Jarle; Kumari, Nimisha +23 more
Lyα line profiles are a powerful probe of interstellar medium (ISM) structure, outflow speed, and Lyman-continuum escape fraction. In this paper, we present the Lyα line profiles of the Cosmic Origins Spectrograph (COS) Legacy Archive Spectroscopic SurveY, a sample rich in spectroscopic analogs of reionization-era galaxies. A large fraction of the…
Characterizing the Near-infrared Spectra of Flares from TRAPPIST-1 during JWST Transit Spectroscopy Observations
Kowalski, Adam F.; Espinoza, Néstor; MacGregor, Meredith A. +16 more
We present the first analysis of JWST near-infrared spectroscopy of stellar flares from TRAPPIST-1 during transits of rocky exoplanets. Four flares were observed from 0.6-2.8 µm with the Near Infrared Imager and Slitless Spectrograph and 0.6-3.5 µm with the Near Infrared Spectrograph during transits of TRAPPIST-1b, f, and g. We discove…
ALMA-IMF. VI. Investigating the origin of stellar masses: Core mass function evolution in the W43-MM2&MM3 mini-starburst
Galván-Madrid, R.; Cunningham, N.; Schneider, N. +35 more
Context. Among the most central open questions regarding the initial mass function (IMF) of stars is the impact of environment on the shape of the core mass function (CMF) and thus potentially on the IMF.
Aims: The ALMA-IMF Large Program aims to investigate the variations in the core distributions (CMF and mass segregation) with cloud charact…
The B & V light curves for recurrent nova T CrB from 1842-2022, the unique pre- and post-eruption high-states, the complex period changes, and the upcoming eruption in 2025.5 ± 1.3
Schaefer, Bradley E.
T CrB is one of the most-famous and brightest novae known, and is a recurrent nova with prior eruptions in 1866 and 1946 that peak at V = 2.0. I have constructed light curves spanning 1842-2022 with 213 730 magnitudes, where the B and V magnitudes are fully corrected to the Johnson system. These light curves first reveal a unique complex high-stat…
Dark matter halo cores and the tidal survival of Milky Way satellites
Navarro, Julio F.; Errani, Raphaël; Peñarrubia, Jorge +2 more
The cuspy central density profiles of cold dark matter (CDM) haloes make them highly resilient to disruption by tides. Self-interactions between dark matter particles, or the cycling of baryons, may result in the formation of a constant-density core that would make haloes more susceptible to tidal disruption. We use N-body simulations to study the…
Quasar UV/X-ray relation luminosity distances are shorter than reverberation-measured radius-luminosity relation luminosity distances
Zajaček, Michal; Czerny, Bożena; Khadka, Narayan +5 more
We use measurements of 59/58 quasars (QSOs), over a redshift range 0.0041 ≤ z ≤ 1.686, to do a comparative study of the radius-luminosity (R - L) and X-ray-UV luminosity (LX - LUV) relations and the implication of these relations for cosmological parameter estimation. By simultaneously determining R - L or LX - L