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Coherent radio emission from a quiescent red dwarf indicative of star-planet interaction
(2020-02-17)
Low-frequency (ν ≲ 150 MHz) stellar radio emission is expected to originate in the outer corona at heights comparable to and larger than the stellar radius. Such emission from the Sun has been used to study coronal structure, ...
Cool Jupiters greatly outnumber their toasty siblings : Occurrence rates from the Anglo-Australian Planet Search
(2020-02-01)
Our understanding of planetary systems different to our own has grown dramatically in the past 30 yr. However, our efforts to ascertain the degree to which the Solar system is abnormal or unique have been hindered by the ...
VLA cm-wave survey of young stellar objects in the Oph A cluster : constraining extreme UV- and X-ray-driven disk photo-evaporation -- A pathfinder for Square Kilometre Array studies
(2019-10-21)
Observations of young stellar objects (YSOs) in centimeter bands can probe the continuum emission from growing dust grains, ionized winds, and magnetospheric activity, which are intimately connected to the evolution of ...
Detection of the nearest Jupiter analog in radial velocity and astrometry data
(2019-10-21)
The presence of Jupiter is crucial to the architecture of the Solar System and models underline this to be a generic feature of planetary systems. We find the detection of the difference between the position and motion ...
PEXO : a global modeling framework for nanosecond timing, microsecond astrometry, and μm/s radial velocities
(2019-10-15)
The ability to make independent detections of the signatures of exoplanets with complementary telescopes and instruments brings a new potential for robust identification of exoplanets and precision characterization. We ...
Brown dwarf census with the Dark Energy Survey year 3 data and the thin disc scale height of early L types
(2019-09-05)
In this paper we present a catalogue of 11 745 brown dwarfs with spectral types ranging from L0 to T9, photometrically classified using data from the Dark Energy Survey (DES) year 3 release matched to the Vista Hemisphere ...
The COMBS survey I : Chemical Origins of Metal-Poor Stars in the Galactic Bulge
(2019-09-01)
Chemistry and kinematic studies can determine the origins of stellar population across the Milky Way. The metallicity distribution function of the bulge indicates that it comprises multiple populations, the more metal-poor ...
The ESO supernovae type Ia progenitor survey (SPY) : The radial velocities of 644 DA white dwarfs
(2019-07-27)
Close double degenerate binaries are one of the favoured progenitor channels for type Ia supernovae, but it is unclear how many suitable systems there are in the Galaxy. We report results of a large radial velocity survey ...
Ongoing astrometric microlensing events from VVV and Gaia
(2019-07)
We extend predictive microlensing event searches using the Vista Variables in the Via Lactea survey and the second Gaia data release. We identify two events with maxima in 2019 that require urgent follow-up. First, we ...
Beyond the Solar Circle - Trends in Massive Star Formation Between the Inner and Outer Galaxy
(2019-07-01)
We have compiled the most complete compact and ultracompact HII region catalogue to date via multi-wavelength inspection of survey data. We utilise data from the recently available SASSy 850$\mu$m survey to identify massive ...