Search Publications
A Coplanar Circumbinary Protoplanetary Disk in the TWA 3 Triple M Dwarf System
Duchêne, Gaspard; Andrews, Sean M.; Czekala, Ian +5 more
We present sensitive ALMA observations of TWA 3, a nearby, young (∼10 Myr) hierarchical system composed of three pre-main-sequence M3-M4.5 stars. For the first time, we detected 12CO and 13CO J = 2-1 emissions from the circumbinary protoplanetary disk around TWA 3A. We jointly fit the protoplanetary disk velocity field, stell…
The age of the carina young association and potential membership of HD 95086
Booth, Mark; del Burgo, Carlos; Hambaryan, Valeri V.
Carina is a nearby young stellar association. So far, only a small number of stars have been clearly identified as members of this association. In this paper, we reanalyse the membership of the association in light of Gaia DR2 data, in particular finding that HD 95086 is a potential member (probability of 71 per cent). This star is noteworthy as o…
Forbidden hugs in pandemic times. II. The luminous red nova variety: AT 2020hat and AT 2020kog
Lundqvist, P.; Reichart, D. E.; Rest, A. +32 more
We present the results of our monitoring campaigns of the luminous red novae (LRNe) AT 2020hat in NGC 5068 and AT 2020kog in NGC 6106. The two objects were imaged (and detected) before their discovery by routine survey operations. They show a general trend of slow luminosity rise, lasting at least a few months. The subsequent major LRN outbursts w…
Photometric, polarimetric, and spectroscopic studies of the luminous, slow-decaying Type Ib SN 2012au
Pandey, S. B.; Ochner, P.; Benetti, S. +15 more
Optical, near-infrared (NIR) photometric and spectroscopic studies, along with the optical imaging polarimetric results for SN 2012au, are presented in this article to constrain the nature of the progenitor and other properties. Well-calibrated multiband optical photometric data (from -0.2 to +413 d since B-band maximum) were used to compute the b…
Detailed elemental abundances of binary stars: searching for signatures of planet formation and atomic diffusion
Bitsch, Bertram; Ting, Yuan-Sen; Murphy, Michael T. +5 more
Binary star systems are assumed to be co-natal and coeval, and thus to have identical chemical composition. In this work, we aim to test the hypothesis that there is a connection between observed element abundance patterns and the formation of planets using binary stars. Moreover, we also want to test how atomic diffusion might influence the obser…
Deciphering the evolution of the Milky Way discs: Gaia APOGEE Kepler giant stars and the Besançon Galaxy Model
Anders, F.; Chiappini, C.; Figueras, F. +13 more
Context. Thanks to ongoing efforts to compute accurate stellar ages, we are able to characterise stars in different regions of the Milky Way. The Gaia and Kepler space-missions, along with ground-based spectroscopic surveys such as APOGEE, provide a unique way to study the chemo-kinematics relations as a function of age through the Galactic stella…
Luminous Late-time Radio Emission from Supernovae Detected by the Karl G. Jansky Very Large Array Sky Survey (VLASS)
Paterson, Kerry; Margutti, Raffaella; Terreran, Giacomo +10 more
We present a population of 19 radio-luminous supernovae (SNe) with emission reaching L ν ~ 1026-1029 erg s-1 Hz-1 in the first epoch of the Very Large Array Sky Survey (VLASS) at 2-4 GHz. Our sample includes one long gamma-ray burst, SN 2017iuk/GRB 171205A, and 18 core-collapse SNe detected …
A Catalog of Interplanetary Coronal Mass Ejections Observed by Juno between 1 and 5.4 au
Lugaz, Noé; Winslow, Réka M.; Möstl, Christian +2 more
We use magnetic field measurements by the Juno spacecraft to catalog and investigate interplanetary coronal mass ejections (ICMEs) beyond 1 au. During its cruise phase, Juno spent about 5 yr in the solar wind between 2011 September and 2016 June, providing measurements of the interplanetary magnetic field (IMF) between 1 and 5.4 au. Juno therefore…
Internal rotation of Milky Way dwarf spheroidal satellites with Gaia Early Data Release 3
van der Marel, Roeland P.; Watkins, Laura L.; del Pino, Andrés +2 more
We present an analysis of the kinematics of 14 satellites of the Milky Way (MW). We use proper motions (PMs) from the Gaia Early Data Release 3 (EDR3) and line-of-sight velocities (vlos) available in the literature to derive the systemic 3D motion of these systems. For six of them, namely the Carina, Draco, Fornax, Sculptor, Sextans, an…
Revealing the formation histories of the first stars with the cosmic near-infrared background
Furlanetto, Steven R.; Sun, Guochao; Mirocha, Jordan +1 more
The cosmic near-infrared background (NIRB) offers a powerful integral probe of radiative processes at different cosmic epochs, including the pre-reionization era when metal-free, Population III (Pop III) stars first formed. While the radiation from metal-enriched, Population II (Pop II) stars likely dominates the contribution to the observed NIRB …