Search Publications
A Long-duration Luminous Type IIn Supernova KISS15s: Strong Recombination Lines from the Inhomogeneous Ejecta-CSM Interaction Region and Hot Dust Emission from Newly Formed Dust
Tominaga, Nozomu; Yoachim, Peter; Ivezić, Željko +7 more
We report the discovery of an SN 1988Z-like type IIn supernova KISS15s found in a low-mass star-forming galaxy at redshift z = 0.038 during the course of the Kiso Supernova Survey (KISS). KISS15s shows long-duration optical continuum and emission line light curves, indicating that KISS15s is powered by a continuous interaction between the expandin…
J-PLUS: A wide-field multi-band study of the M 15 globular cluster. Evidence of multiple stellar populations in the RGB
Cortesi, Arianna; Chies-Santos, Ana L.; Mendes de Oliveira, Claudia +21 more
Context. As a consequence of internal and external dynamical processes, Galactic globular clusters (GCs) have properties that vary radially. Wide-field observations covering the entire projected area of GCs out to their tidal radii (rtidal) can therefore give crucial information on these important relics of the Milky Way formation era. …
Electron Density Profiles in the Upper Ionosphere of Mars From 11 Years of MARSIS Data: Variability Due to Seasons, Solar Cycle, and Crustal Magnetic Fields
Gurnett, D. A.; Morgan, D. D.; Halekas, J. +3 more
The Mars Advanced Radar for Subsurface and Ionosphere Sounding on board the Mars Express spacecraft measures the frequency of local plasma oscillations, which can be used to determine electron densities local to the spacecraft. This paper provides an overview of electron densities in the upper Martian ionosphere, obtained by investigating over 400…
Exploring the innermost dust formation region of the oxygen-rich AGB star IK Tauri with VLT/SPHERE-ZIMPOL and VLTI/AMBER
Ohnaka, K.; Adam, C.
Context. Low- and intermediate-mass stars on the asymptotic giant branch (AGB) are known to be prevalent dust providers to galaxies, replenishing the surrounding medium with molecules and dust grains. However, the mechanisms responsible for the formation and acceleration of dust in the cool extended atmospheres of AGB stars are still open to debat…
Modeled Subglacial Water Flow Routing Supports Localized Intrusive Heating as a Possible Cause of Basal Melting of Mars' South Polar Ice Cap
Butcher, F. E. G.; Balme, M. R.; Conway, S. J. +1 more
The discovery of an 20-km-wide area of bright subsurface radar reflections, interpreted as liquid water, beneath the Martian south polar layered deposits (SPLD) in data from the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) instrument, and the discovery of two geologically recent potential eskers (landforms produced by subgla…
The Filamentary Radio Lobes of the Seyfert-Starburst Composite Galaxy NGC 3079
O'Dea, C. P.; Baum, S. A.; Kharb, P. +2 more
We present results from multifrequency polarization-sensitive Very Large Array observations of the Seyfert-starburst composite galaxy NGC 3079. Our sensitive radio observations reveal a plethora of radio “filaments” comprising the radio lobes in this galaxy. We analyze the origin of these radio filaments in the context of existing Chandra X-ray an…
Detection and Doppler monitoring of K2-285 (EPIC 246471491), a system of four transiting planets smaller than Neptune
Kuzuhara, M.; Alonso, R.; Deeg, H. +43 more
Context. The Kepler extended mission, also known as K2, has provided the community with a wealth of planetary candidates that orbit stars typically much brighter than the targets of the original mission. These planet candidates are suitable for further spectroscopic follow-up and precise mass determinations, leading ultimately to the construction …
Magnetic Field Strengths and Variations in Grain Alignment in the Local Bubble Wall
Andersson, B. -G.; Medan, Ilija
Optical and infrared continuum polarization from the interstellar medium is known to generally be due to irregular dust grains aligned with the magnetic field. This provides an important tool to probe the geometry and strength of those fields, particularly if the variations in the grain alignment efficiencies can be understood. Here, we examine po…
New online database of symbiotic variables: Symbiotics in X‑rays
Merc, J.; Gális, R.; Wolf, M.
Symbiotic variable stars belong to an interesting class of interacting binary systems. Since the beginning of this century, the systematic search for these objects has begun, and such surveys have led to discoveries of many new objects and dozens of candidates in the Milky Way and the Local Group. As the latest catalogue of symbiotic binaries is a…
Identifying transient and variable sources in radio images
Eislöffel, J.; Wijers, R. A. M. J.; Fender, R. +16 more
With the arrival of a number of wide-field snapshot image-plane radio transient surveys, there will be a huge influx of images in the coming years making it impossible to manually analyse the datasets. Automated pipelines to process the information stored in the images are being developed, such as the LOFAR Transients Pipeline, outputting light cu…