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iPTF 16asu: A Luminous, Rapidly Evolving, and High-velocity Supernova
Cenko, S. B.; Sollerman, J.; Hurley, K. +23 more
Wide-field surveys are discovering a growing number of rare transients whose physical origin is not yet well understood. Here we present optical and UV data and analysis of intermediate Palomar Transient Factory (iPTF) 16asu, a luminous, rapidly evolving, high-velocity, stripped-envelope supernova (SN). With a rest-frame rise time of just four day…
Molecular gas on large circumgalactic scales at z = 3.47
Maiolino, R.; Marconi, A.; Ginolfi, M. +9 more
We report the ALMA observations of the most massive (star-forming) galaxy in the redshift range 3 < z < 4 within the whole Great Observatories Origins Deep Survey South field (GOODS-S) field. We detect a large elongated structure of molecular gas around the massive primeval galaxy, traced by the CO(4-3) emission, and extended over 40 kpc. We…
Cross-correlating Planck tSZ with RCSLenS weak lensing: implications for cosmology and AGN feedback
Heymans, Catherine; Hinshaw, Gary; Harnois-Déraps, Joachim +11 more
We present measurements of the spatial mapping between (hot) baryons and the total matter in the Universe, via the cross-correlation between the thermal Sunyaev-Zeldovich (tSZ) map from Planck and the weak gravitational lensing maps from the Red Cluster Sequence Lensing Survey (RCSLenS). The cross-correlations are performed on the map level where …
The Gaia-ESO Survey: Calibration strategy
Gilmore, G.; Bayo, A.; Allende Prieto, C. +60 more
The Gaia-ESO survey (GES) is now in its fifth and last year of observations and has produced tens of thousands of high-quality spectra of stars in all Milky Way components. This paper presents the strategy behind the selection of astrophysical calibration targets, ensuring that all GES results on radial velocities, atmospheric parameters, and chem…
On significance of VLBI/Gaia position offsets
Petrov, L.; Kovalev, Y. Y.
We have cross matched the Gaia Data Release 1 secondary data set that contains positions of 1.14 billion objects against the most complete to date catalogue of very long baseline interferometry (VLBI) positions of 11.4 thousand sources, almost exclusively active galactic nuclei. We found 6064 matches, I.e. 53 per cent radio objects. The median unc…
Observational Signatures of Transverse Magnetohydrodynamic Waves and Associated Dynamic Instabilities in Coronal Flux Tubes
Yokoyama, T.; Antolin, P.; De Moortel, I. +1 more
Magnetohydrodynamic (MHD) waves permeate the solar atmosphere and constitute potential coronal heating agents. Yet, the waves detected so far may be but a small subset of the true existing wave power. Detection is limited by instrumental constraints but also by wave processes that localize the wave power in undetectable spatial scales. In this stu…
How Do Stars Gain Their Mass? A JCMT/SCUBA-2 Transient Survey of Protostars in Nearby Star-forming Regions
Herczeg, Gregory J.; Kwon, Woojin; Soam, Archana +55 more
Most protostars have luminosities that are fainter than expected from steady accretion over the protostellar lifetime. The solution to this problem may lie in episodic mass accretion—prolonged periods of very low accretion punctuated by short bursts of rapid accretion. However, the timescale and amplitude for variability at the protostellar phase …
The Geometry of the Sagittarius Stream from Pan-STARRS1 3π RR Lyrae
Chambers, Kenneth C.; Rix, Hans-Walter; Belokurov, Vasily +11 more
We present a comprehensive and precise description of the Sagittarius (Sgr) stellar stream’s 3D geometry as traced by its old stellar population. This analysis draws on the sample of ∼44,000 RR Lyrae (RRab) stars from the Pan-STARRS1 (PS1) 3π survey, which is ∼ 80 % complete and ∼ 90 % pure within 80 kpc, and extends to ≳ 120 {kpc} with a distance…
Outflows, infall and evolution of a sample of embedded low-mass protostars. The William Herschel Line Legacy (WILL) survey
André, Ph.; Könyves, V.; Fedele, D. +22 more
Context. Herschel observations of water and highly excited CO (J > 9) have allowed the physical and chemical conditions in the more active parts of protostellar outflows to be quantified in detail for the first time. However, to date, the studied samples of Class 0/I protostars in nearby star-forming regions have been selected from bright, well…
Kinematics of the local disk from the RAVE survey and the Gaia first data release
Robin, Annie C.; Bienaymé, Olivier; Fernández-Trincado, José G. +1 more
Aims: We attempt to constrain the kinematics of the thin and thick disks using the Besançon population synthesis model together with RAVE DR4 and Gaia first data release (TGAS).
Methods: The RAVE fields were simulated by applying a detailed target selection function and the kinematics was computed using velocity ellipsoids depending on a…