Search Publications
An extended [C II] halo around a massive star-forming galaxy at z = 5.3
Aravena, M.; Díaz-Santos, T.; Decarli, R. +8 more
High-redshift observations are often biased towards massive and bright galaxies that are not necessarily representative of the full population. In order to accurately study galaxy evolution and mass assembly at these redshifts, observations of 'normal' main sequence galaxies are required. Here we present Atacama Large Millimeter/Submillimeter Arra…
A comparative analysis of the chemical compositions of Gaia-Enceladus/Sausage and Milky Way satellites using APOGEE
Horta, Danny; Minniti, Dante; Beaton, Rachael L. +11 more
We use data from the 17th data release of the Apache Point Observatory Galactic Evolution Experiment (APOGEE 2) to contrast the chemical composition of the recently discovered Gaia Enceladus/Sausage system (GE/S) to those of 10 Milky Way (MW) dwarf satellite galaxies: LMC, SMC, Boötes I, Carina, Draco, Fornax, Sagittarius, Sculptor, Sextans, and U…
The period-luminosity relation for Mira variables in the Milky Way using Gaia DR3: a further distance anchor for H0
Sanders, Jason L.
Gaia DR3 parallaxes are used to calibrate preliminary period-luminosity relations of O-rich Mira variables in the 2MASS J, H, and Ks bands using a probabilistic model accounting for variations in the parallax zero-point and underestimation of the parallax uncertainties. The derived relations are compared to those measured for the Large …
The radio emission in radio-quiet quasars: the VLBA perspective
Gelfand, Joseph D.; Laor, Ari; Behar, Ehud +2 more
The origin of the radio emission in radio-quiet quasars (RQQ) is not established yet. We present new VLBA observations at 1.6 and 4.9 GHz of 10 RQQ (9 detected), which together with published earlier observations of 8 RQQ (5 detected), forms a representative sample of 18 RQQ drawn from the Palomar-Green sample of low z (< 0.5) AGN. The spectral…
Exoplanet spectroscopy with JWST NIRISS: diagnostics and case studies
Madhusudhan, Nikku; Holmberg, Måns
The JWST is ushering in a new era in remote sensing of exoplanetary atmospheres. Atmospheric retrievals of exoplanets can be highly sensitive to high-precision JWST data. It is, therefore, imperative to characterize the instruments and noise sources using early observations to enable robust characterization of exoplanetary atmospheres using JWST-q…
Metallicity and age effects on lithium depletion in solar analogues
Meléndez, Jorge; Rathsam, Anne; Martos, Giulia +1 more
The lithium present in the photospheres of solar-type stars is transported to the inner parts by convection, reaching regions even somewhat below the convection zone, by non-standard transport mechanisms. In stars with deeper convective zones, this element can reach regions with temperatures sufficient enough to be destroyed, implying in a lower L…
The obscured nucleus and shocked environment of VV 114E revealed by JWST/MIRI spectroscopy
Hernán-Caballero, A.; Rigopoulou, D.; Pereira-Santaella, M. +5 more
Compact Obscured Nuclei (CONs) potentially hide extreme supermassive black hole (SMBH) growth behind large column densities of gas/dust. We present a spectroscopic analysis of the heavily obscured nucleus and the surrounding environment of the eastern region of the nearby (z = 0.02007) interacting galaxy VV 114 with the JWST Mid-InfraRed Instrumen…
An observationally derived kick distribution for neutron stars in binary systems
Strader, Jay; Bahramian, Arash; Miller-Jones, James C. A. +5 more
Understanding the natal kicks received by neutron stars (NSs) during formation is a critical component of modelling the evolution of massive binaries. Natal kicks are an integral input parameter for population synthesis codes, and have implications for the formation of double NS systems and their subsequent merger rates. However, many of the stand…
Differential reddening in the direction of 56 Galactic globular clusters
Milone, A. P.; Cordoni, G.; Marino, A. F. +6 more
The presence of differential reddening in the direction of Galactic globular clusters (GCs) has proven to be a serious limitation in the traditional colour-magnitude diagram (CMD) analysis. Here, we estimate local reddening variations in the direction of 56 Galactic GCs. To do that, we use the public catalogues derived as part of the Hubble Space …
WISDOM project - XIV. SMBH mass in the early-type galaxies NGC 0612, NGC 1574, and NGC 4261 from CO dynamical modelling
Williams, Thomas G.; Sarzi, Marc; Cappellari, Michele +9 more
We present a CO dynamical estimate of the mass of the supermassive black hole (SMBH) in three nearby early-type galaxies: NGC 0612, NGC 1574, and NGC 4261. Our analysis is based on Atacama Large Millimeter/submillimeter Array (ALMA) Cycle 3-6 observations of the 12CO(2-1) emission line with spatial resolutions of 14-58 pc (0.01″-0.26″).…