Search Publications
Exploring the differences of integrated and spatially resolved analysis using integral field unit data: the case of Abell 14
Akras, Stavros; Monteiro, Hektor; Aleman, Isabel +3 more
We present a new approach to study planetary nebulae using integral field spectroscopy. VLT@VIMOS datacube of the planetary nebula Abell 14 is analysed in three different ways by extracting: (I) the integrated spectrum, (II) one-dimensional simulated long-slit spectra for different position angles, and (III) spaxel-by-spaxel spectra. These data ar…
Effects of Fluctuating Magnetic Field on the Growth of the Kelvin-Helmholtz Instability at the Earth's Magnetopause
Hasegawa, H.; Nakamura, R.; Narita, Y. +5 more
At the Earth's magnetopause, the Kelvin-Helmholtz (KH) instability, driven by the persistent velocity shear between the magnetosheath and the magnetosphere, has been frequently observed during northward interplanetary magnetic field periods and considered as one of the most important candidates for transporting and mixing plasmas across the magnet…
Is NGC 5824 the Core of the Progenitor of the Cetus Stream?
Zhao, Gang; Zhao, Jing-Kun; Kang, Xi +5 more
The complicated story of the Cetus Stream (CS) is recently revealed by its newly discovered ∼150 members with 6D kinematics from the cross-matched catalog of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) DR5 K giants and Gaia DR2. It exhibits a very diffuse structure at heliocentric distances between 20 and 50 kpc, extendi…
Hypervelocity stars in the Gaia era. Revisiting the most extreme stars from the MMT HVS survey
Heber, U.; Irrgang, A.; Kreuzer, S.
The hypervelocity star (HVS) survey conducted at the Multiple Mirror Telescope (MMT) identified 42 B-type stars in the Galactic halo whose radial velocity in the Galactic rest-frame exceeds +275 km s-1. In order to unravel the nature and origin of those high-velocity outliers, their complete six-dimensional phase space information is ne…
Colour and tropospheric cloud structure of Jupiter from MUSE/VLT: Retrieving a universal chromophore
Fletcher, Leigh N.; Irwin, Patrick G. J.; Orton, Glenn S. +1 more
Recent work by Sromovsky et al. (2017) suggested that all red colour in Jupiter's atmosphere could be explained by a single colour-carrying compound, a so-called 'universal chromophore'. We tested this hypothesis on ground-based spectroscopic observations in the visible and near-infrared (480-930 nm) from the VLT/MUSE instrument between 2014 and 2…
A complete catalogue of dusty supernova remnants in the Galactic plane
De Looze, I.; Rho, J.; Dunne, L. +9 more
We search for far-infrared (FIR) counterparts of known supernova remnants (SNRs) in the Galactic plane (360° in longitude and $b = \pm \, 1^{\circ }$ ) at 70-500 µm with Herschel. We detect dust signatures in 39 SNRs out of 190, made up of 13 core-collapse supernovae (CCSNe), including 4 Pulsar Wind Nebulae (PWNe), and 2 Type Ia SNe. A furth…
Network Jets as the Driver of Counter-streaming Flows in a Solar Filament/Filament Channel
Tiwari, Sanjiv K.; Panesar, Navdeep K.; Moore, Ronald L. +1 more
Counter-streaming flows in a small (100″ long) solar filament/filament channel are directly observed in high-resolution Solar Dynamics Observatory (SDO)/Atmospheric Imaging Assembly (AIA) extreme-ultraviolet (EUV) images of a region of enhanced magnetic network. We combine images from SDO/AIA, SDO/Helioseismic and Magnetic Imager (HMI), and the In…
Scaling K2. II. Assembly of a Fully Automated C5 Planet Candidate Catalog Using EDI-Vetter
Schlieder, Joshua E.; Petigura, Erik A.; Crossfield, Ian J. M. +5 more
We present a uniform transiting exoplanet candidate list for Campaign 5 of the K2 mission. This catalog contains 75 planets with seven multi-planet systems (five double, one triple, and one quadruple planet system). Within the range of our search, we find eight previously undetected candidates, with the remaining 67 candidates overlapping 51% of t…
Space weathering by simulated micrometeorite bombardment on natural olivine and pyroxene: A coordinated IR and TEM study
Hiesinger, Harald; Helbert, Jörn; Weber, Iris +9 more
We studied space-weathering effects caused by micrometeorite bombardment simulated by pulsed intense infrared laser, generating ∼15 mJ per pulse in high vacuum. For our investigation, we selected a natural olivine (San Carlos olivine (Fo91)) and a natural pyroxene (Bamble orthopyroxene (En87)) as important rock forming minera…
The CGM at Cosmic Noon with KCWI: Outflows from a Star-forming Galaxy at z = 2.071
Kacprzak, Glenn G.; Churchill, Christopher W.; Davé, Romeel +3 more
We present the first results from our "CGM at Cosmic Noon with KCWI" program to study gas flows in the circumgalactic medium (CGM) at z = 2-3. Combining the power of a high-resolution VLT/UVES quasar spectrum, a Hubble Space Telescope/Advanced Camera for Surveys image, and integral field spectroscopy with Keck/KCWI (Keck Cosmic Web Imager), we det…