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The CALYPSO IRAM-PdBI survey of jets from Class 0 protostars. Exploring whether jets are ubiquitous in young stars
Maret, S.; Podio, L.; Codella, C. +10 more
Aims: As a part of the CALYPSO Large Program, we aim to constrain the properties of protostellar jets and outflows by searching for corresponding emission in a sample of 21 Class 0 protostars covering a broad range of internal luminosities (Lint from 0.035 L⊙ to 47 L⊙).
Methods: We analyzed high angular (…
The ASAS-SN catalogue of variable stars IX: The spectroscopic properties of Galactic variable stars
Kochanek, C. S.; Stanek, K. Z.; Dong, Subo +11 more
The All-Sky Automated Survey for Supernovae provides long baseline (~4 yr) V-band light curves for sources brighter than V≲ 17 mag across the whole sky. We produced V-band light curves for a total of ~61.5 million sources and systematically searched these sources for variability. We identified ~426 000 variables, including ~219 000 new discoveries…
Flares in open clusters with K2. II. Pleiades, Hyades, Praesepe, Ruprecht 147, and M 67
Kristiansen, Martti H.; Omohundro, Mark; Davenport, James R. A. +3 more
Context. Magnetic fields are a key component in the main sequence evolution of low mass stars. Flares, energetic eruptions on the surfaces of stars, are an unmistakable manifestation of magnetically driven emission. The occurrence rates and energy distributions of flares trace stellar characteristics such as mass and age. However, before flares ca…
ARES. V. No Evidence For Molecular Absorption in the HST WFC3 Spectrum of GJ 1132 b
Drossart, Pierre; Bouwman, Jeroen; Blain, Doriann +25 more
We present a study on the spatially scanned spectroscopic observations of the transit of GJ 1132 b, a warm (∼500 K) super-Earth (1.13 R⊕) that was obtained with the G141 grism (1.125-1.650 µm) of the Wide Field Camera 3 (WFC3) on board the Hubble Space Telescope. We used the publicly available Iraclis pipeline to extract the plane…
Measuring the ratio of the gas and dust emission radii of protoplanetary disks in the Lupus star-forming region
de Gregorio-Monsalvo, I.; Pascucci, I.; Testi, L. +15 more
We performed a comprehensive demographic study of the CO extent relative to dust of the disk population in the Lupus clouds in order to find indications of dust evolution and possible correlations with other disk properties. We increased the number of disks of the region with measured RCO and Rdust from observations with the …
The ASKAP Variables and Slow Transients (VAST) Pilot Survey
Ramsay, Gavin; Kaplan, David L.; Gaensler, B. M. +52 more
The Variables and Slow Transients Survey (VAST) on the Australian Square Kilometre Array Pathfinder (ASKAP) is designed to detect highly variable and transient radio sources on timescales from 5 s to $∼ 5$ yr. In this paper, we present the survey description, observation strategy and initial results from the VAST Phase I Pilot Survey. This pilot s…
Perturbers: SPHERE detection limits to planetary-mass companions in protoplanetary disks
Ménard, F.; Garufi, A.; Henning, Th. +25 more
The detection of a wide range of substructures such as rings, cavities, and spirals has become a common outcome of high spatial resolution imaging of protoplanetary disks, both in the near-infrared scattered light and in the thermal millimetre continuum emission. The most frequent interpretation of their origin is the presence of planetary-mass co…
Solar Orbiter: Mission and spacecraft design
Müller, D.; Zouganelis, I.; Cipriani, F. +37 more
The main scientific goal of Solar Orbiter is to address the central question of heliophysics: `how does the Sun create and control the heliosphere?' To achieve this goal, the spacecraft carries a unique combination of ten scientific instruments (six remote-sensing instruments and four in-situ instruments) towards the innermost regions of the Solar…
On the Compatibility of Ground-based and Space-based Data: WASP-96 b, an Example
Changeat, Quentin; Chubb, Katy L.; Edwards, Billy +5 more
The study of exoplanetary atmospheres relies on detecting minute changes in the transit depth at different wavelengths. To date, a number of ground- and space-based instruments have been used to obtain transmission spectra of exoplanets in different spectral bands. One common practice is to combine observations from different instruments in order …
A new, Gaia-based, catalogue of blue straggler stars in open clusters
Carraro, G.; Ahumada, J. A.; Rain, M. J.
Context. Blue straggler stars are exotic objects present in all stellar environments whose nature and formation channels are still partially unclear. They seem to be particularly abundant in open clusters (OCs), thus offering a unique chance to tackle these problems statistically.
Aims: We aim to build up a new and homogeneous catalogue of bl…