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No significant correlation between radial velocity planet presence and debris disc properties
Kennedy, Grant M.; Su, Kate Y. L.; Yelverton, Ben
We investigate whether the tentative correlation between planets and debris discs which has been previously identified can be confirmed at high significance. We compile a sample of 201 stars with known planets and existing far-infrared observations. The sample is larger than those studied previously since we include targets from an unpublished Her…
Star-forming Sites IC 446 and IC 447: An Outcome of End-dominated Collapse of Monoceros R1 Filament
Dewangan, L. K.; Ojha, D. K.; Pirogov, L. E. +1 more
We present an analysis of multiwavelength observations of Monoceros R1 (Mon R1) complex (at d ∼760 pc). An elongated filament (length ∼14 pc, mass ∼1465 M⊙) is investigated in the complex, which is the most prominent structure in the Herschel column density map. An analysis of the FUGIN 12CO(1-0) and 13CO(1-0) line…
Constraining the masses of high-redshift clusters with weak lensing: Revised shape calibration testing for the impact of stronger shears and increased blending
Gladders, M. D.; Schrabback, T.; Hernández-Martín, B. +7 more
Weak lensing measurements suffer from well-known shear estimation biases, which can be partially corrected for with the use of image simulations. In this work we present an analysis of simulated images that mimic Hubble Space Telescope/Advance Camera for Surveys observations of high-redshift galaxy clusters, including cluster specific issues such …
The Galactic Plane Infrared Polarization Survey (GPIPS): Data Release 4
Jameson, K. E.; Cerny, C.; Montgomery, J. +7 more
The Galactic Plane Infrared Polarization Survey (GPIPS) seeks to characterize the magnetic field in the dusty Galactic disk using near-infrared stellar polarimetry. All GPIPS observations were completed using the 1.83 m Perkins telescope and Mimir instrument. GPIPS observations surveyed 76 deg2 of the northern Galactic plane, from Galac…
The chemodynamics of prograde and retrograde Milky Way stars
Kordopatis, Georges; Recio-Blanco, Alejandra; Hill, Vanessa +1 more
Context. The accretion history of the Milky Way is still unknown, despite the recent discovery of stellar systems that stand out in terms of their energy-angular momentum space, such as Gaia-Enceladus-Sausage. In particular, it is still unclear how these groups are linked and to what extent they are well-mixed.
Aims: We investigate the simila…
Timing Terminators: Forecasting Sunspot Cycle 25 Onset
McIntosh, Scott W.; Leamon, Robert J.; Chapman, Sandra C. +1 more
Recent research has demonstrated the existence of a new type of solar event, the "terminator." Unlike the Sun's signature events, flares and coronal mass ejections, the terminator most likely originates in the solar interior, at or near the tachocline. The terminator signals the end of a magnetic activity cycle at the Sun's equator and the start o…
Kinematic modelling of clusters with Gaia: the death throes of the Hyades
Oh, Semyeong; Evans, Neil Wyn
The precision of the Gaia data offers a unique opportunity to study the internal velocity field of star clusters. We develop and validate a forward-modelling method for the internal motions of stars in a cluster. The model allows an anisotropic velocity dispersion matrix and linear velocity gradient describing rotation and shear, combines radial v…
A wide-area GMRT 610-MHz survey of ELAIS N1 field
Vaccari, M.; Taylor, A. R.; Ishwara-Chandra, C. H. +3 more
In this paper, we present a wide-area 610-MHz survey of the ELAIS N1 field with the GMRT, covering an area of 12.8 deg2 at a resolution of 6 arcsec and with an rms noise of ~40 $\mu$Jy beam-1. This is equivalent to ~20 $\mu$Jy beam-1 rms noise at 1.4 GHz for a spectral index of -0.75. The primary goal of the survey…
The XMM Cluster Survey: new evidence for the 3.5-keV feature in clusters is inconsistent with a dark matter origin
Romer, A. K.; Bhargava, S.; Jeltema, T. +14 more
There have been several reports of a detection of an unexplained excess of X-ray emission at $\simeq$3.5 keV in astrophysical systems. One interpretation of this excess is the decay of sterile neutrino dark matter. The most influential study to date analysed 73 clusters observed by the XMM-Newton satellite. We explore evidence for a ≃3.5-keV exces…
CME-induced Thermodynamic Changes in the Corona as Inferred from Fe XI and Fe XIV Emission Observations during the 2017 August 21 Total Solar Eclipse
Druckmüller, Miloslav; Ding, Adalbert; Boe, Benjamin +3 more
We present the first remote sensing observations of the impact from a Coronal Mass Ejection (CME) on the thermodynamic properties of the solar corona between 1 and 3 R⊙. Measurements of the Fe XI (789.2 nm) and Fe XIV (530.3 nm) emission were acquired with identical narrow-bandpass imagers at three observing sites during the 2017 August…