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Variable stars in the VVV globular clusters. II. NGC6441, NGC6569, NGC6626 (M28), NGC6656 (M22), 2MASS-GC02, and Terzan10
(2021-07-12)
Context. The Galactic globular clusters (GGCs) located in the inner regions of the Milky Way suffer from high extinction that makes their observation challenging. High densities of field stars in their surroundings complicate ...
R-Process elements from magnetorotational hypernovae
(2021-07-08)
Neutron-star mergers were recently confirmed as sites of rapid-neutron-capture (r-process) nucleosynthesis 1–3. However, in Galactic chemical evolution models, neutron-star mergers alone cannot reproduce the observed element ...
VVV-WIT-08: the giant star that blinked
(2021-06-11)
We report the serendipitous discovery of a late-type giant star that exhibited a smooth, eclipse-like drop in flux to a depth of 97 per cent. Minimum flux occurred in April 2012 and the total event duration was a few hundred ...
Cloud busting: enstatite and quartz clouds in the atmosphere of 2M2224-0158
(2021-05-18)
We present the most detailed data-driven exploration of cloud opacity in a substellar object to-date. We have tested over 60 combinations of cloud composition and structure, particle size distribution, scattering model, ...
The GALAH+ Survey : Third Data Release
(2021-05-06)
The ensemble of chemical element abundance measurements for stars, along with precision distances and orbit properties, provides high-dimensional data to study the evolution of the Milky Way. With this third data release ...
Discovery of an Extremely Short Duration Flare from Proxima Centauri Using Millimeter through FUV Observations
(2021-04-21)
We present the discovery of an extreme flaring event from Proxima Cen by the Australian Square Kilometre Array Pathfinder (ASKAP), Atacama Large Millimeter/submillimeter Array (ALMA), Hubble Space Telescope (HST), Transiting ...
Assessing the stellar population and the environment of an HII region on the far side of the Galaxy
(2021-04-20)
We have investigated the stellar and interstellar content of the distant star formation region IRAS 17591-2228 (WISE HII region GAL 007.47+0.06). It is associated to a water maser, whose parallax distance is d=20.4^{+2.8} ...
Polarization of hot Jupiter systems: a likely detection of stellar activity and a possible detection of planetary polarization
(2021-04-01)
We present high-precision linear polarization observations of four bright hot Jupiter systems ($\tau$ Boo, HD 179949, HD 189733 and 51 Peg) and use the data to search for polarized reflected light from the planets. The ...
Analysis of physical processes in eruptive YSOs with near infrared spectra and multi-wavelength light curves
(2021-03-26)
The decade-long Vista Variables in the Via Lactea (VVV) survey has detected numerous highly variable young stellar objects (YSOs). We present a study of 61 highly variable VVV YSOs (Delta Ks = 1-5 mag), combining near ...
Observations of magnetic fields surrounding LkHa 101 taken by the BISTRO survey with JCMT-POL-2
(2021-02-10)
We report the first high spatial resolution measurement of magnetic fields surrounding LkHa 101, part of the Auriga- California molecular cloud. The observations were taken with the POL-2 polarimeter on the James Clerk ...