Search Publications
The highest mass Kepler red giants - I. Global asteroseismic parameters of 48 stars
Li, Yaguang; Huber, Daniel; Bedding, Timothy R. +6 more
When low- and intermediate-mass stars evolve off the main sequence, they expand and cool into the red giant stages of evolution, which include those associated with shell H burning (the red giant branch), core He burning (the red clump), and shell He burning (the asymptotic giant branch). The majority of red giants have masses <2 M⊙,…
Autonomous disentangling for spectroscopic surveys
Xiang, Maosheng; Rix, Hans-Walter; Fouesneau, Morgan +2 more
A suite of spectroscopic surveys is producing vast sets of stellar spectra with the goal of advancing stellar physics and Galactic evolution by determining their basic physical properties. A substantial fraction of these stars are in binary systems, but almost all large-survey modelling pipelines treat them as single stars. For sets of multi-epoch…
Connecting core galaxy properties to the massive black hole binary population
Gültekin, Kayhan; Harris, C. J.
We investigate how the properties of massive black hole binaries influence the observed properties of core galaxies. We compare the observed trend in stellar mass deficit as a function of total stellar mass in the core galaxy with predicted trends in IllustrisTNG. We calculate mass deficits in simulated galaxies by applying subgrid, post-processin…
Illuminating evaporating protostellar outflows: ERIS/SPIFFIER reveals the dissociation and ionization of HH 900
Reiter, Megan; Manara, Carlo F.; Ramsay, Suzanne +4 more
Protostellar jets and outflows are signposts of active star formation. In H II regions, molecular tracers like CO only reveal embedded portions of the outflow. Outside the natal cloud, outflows are dissociated, ionized, and eventually completely ablated, leaving behind only the high-density jet core. Before this process is complete, there should b…
JWST/NIRSpec spectroscopy of intermediate-mass quiescent galaxies at z 3-4
Harikane, Yuichi; Inoue, Akio K.; Hashimoto, Takuya +9 more
We present the analysis of three intermediate-mass quiescent galaxies (QGs) with stellar masses of
Age and metal gradients in massive quiescent galaxies at 0.6 ≲ z ≲ 1.0: implications for quenching and assembly histories
D'Eugenio, Francesco; van Dokkum, Pieter G.; Franx, Marijn +12 more
We present spatially resolved, simple stellar population equivalent ages, stellar metallicities, and abundance ratios for 456 massive ($10.3\lesssim \log (\mathrm{M}_*/\mathrm{M}_\odot)\lesssim 11.8$) quiescent galaxies at $0.6\lesssim z\lesssim 1.0$ from the Large Early Galaxy Astrophysics Census, derived using full-spectrum models. Typically, we…
Characterization of high-velocity stars in the S-PLUS internal fourth data release
Pereira, C. B.; Mendes de Oliveira, C.; Placco, V. M. +7 more
In general, the atypical high velocity of some stars in the Galaxy can only be explained by invoking acceleration mechanisms related to extreme astrophysical events in the Milky Way. Using astrometric data from Gaia and the photometric information in 12 filters of the S-PLUS, we performed a kinematic, dynamical, and chemical analysis of 64 stars w…
Swift, NuSTAR, and INTEGRAL observations of the symbiotic X-ray binary IGR J16194-2810
Ducci, L.; Romano, P.; Ferrigno, C. +1 more
We report on a simultaneous observational campaign with both Swift/XRT and NuSTAR targeting the symbiotic X-ray binary (SyXB) IGR J16194-2810. The main goal of the campaign was to investigate the possible presence of cyclotron scattering absorption features in the broad-band spectrum of the source, and help advance our understanding of the process…
Wide Area VISTA Extra-galactic Survey (WAVES): unsupervised star-galaxy separation on the WAVES-Wide photometric input catalogue using UMAP and HDBSCAN
Holwerda, Benne W.; Driver, Simon P.; Robotham, Aaron S. G. +13 more
Star-galaxy separation is a crucial step in creating target catalogues for extragalactic spectroscopic surveys. A classifier biased towards inclusivity risks including high numbers of stars, wasting fibre hours, while a more conservative classifier might overlook galaxies, compromising completeness and hence survey objectives. To avoid bias introd…
Chemical abundances for a sample of FGK dwarfs in the Pleiades open cluster from APOGEE
Wanderley, Fábio; Cunha, Katia; Souto, Diogo +8 more
This paper presents chemical abundances of 12 elements (C, Na, Mg, Al, Si, K, Ca, Ti, V, Cr, Mn, and Fe) for 80 FGK dwarfs in the Pleiades open cluster, which span a temperature range of