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New magnetic chemically peculiar stars and candidates in the ATLAS first catalogue of variable stars
Paunzen, Ernst; Hümmerich, Stefan; Bernhard, Klaus +1 more
The number of known variable stars has increased by several magnitudes over the last decade, and automated classification routines are becoming increasingly important to cope with this development. Here we show that the 'upside-down CBH variables', which were proposed as a potentially new class of variable stars by Heinze et al. in the ATLAS First…
Nova LMC 2009a as observed with XMM-Newton, compared with other novae
Ness, Jan-Uwe; Behar, Ehud; Pinto, Ciro +9 more
We examine four high-resolution reflection grating spectrometers (RGS) spectra of the February 2009 outburst of the luminous recurrent nova LMC 2009a. They were very complex and rich in intricate absorption and emission features. The continuum was consistent with a dominant component originating in the atmosphere of a shell burning white dwarf (WD…
Detection of the hard X-ray non-thermal emission from Kepler's supernova remnant
Katsuda, Satoru; Terada, Yukikatsu; Bamba, Aya +1 more
We report the first robust detection of the hard X-ray emission in the 15-30 keV band from Kepler's supernova remnant with the silicon PIN-type semiconductor detector of the hard X-ray detector (HXD-PIN) onboard Suzaku. The detection significance is 7.17σ for the emission from Kepler's entire X-ray emitting region. The energy spectrum is found to …
Ethynyl Around the HII Regions S255 and S257
Kirsanova, M. S.; Punanova, A. F.; Buslaeva, A. I.
We present the results of the ethynyl (C2H) emission line observations towards the S255 and S257 HII regions and the molecular cloud between them. Radial profiles of line brightness, column density, and abundance of C2H are obtained. We show that the radial profile of the ethynyl abundance is almost flat towards the HII regio…
Detection of new O-type stars in the obscured stellar cluster Tr 16-SE in the Carina Nebula with KMOS
Preibisch, T.; Roccatagliata, V.; Ercolano, B. +2 more
Context. The Carina Nebula harbors a large population of high-mass stars, including at least 75 O-type and Wolf-Rayet (WR) stars, but the current census is not complete since further high-mass stars may be hidden in or behind the dense dark clouds that pervade the association.
Aims: With the aim of identifying optically obscured O- and early …
Subsurface Reflectors Detected by SHARAD Reveal Stratigraphy and Buried Channels Over Central Elysium Planitia, Mars
Tao, Yu; Muller, Jan-Peter; Xiong, Siting +3 more
The Central Elysium Planitia (CEP) is one of the youngest geological units on Mars and displays evidence of volcanic and fluvial activities on the surface. The origin of the CEP material has long been debated with a range of hypotheses from purely fluvial to solely volcanic origins. This study presents a comprehensive investigation of SHAllow RADa…
Reconstruction Test of Turbulence Power Spectra in 3D Wavenumber Space with at Most 9 Virtual Spacecraft Measurements
He, Jiansen; Feng, Xueshang; Zhang, Lei +1 more
The k filtering/wave telescope method has been successfully applied to the 4 spacecraft measurements from Cluster II and MMS, revealing the four dimensional power spectral density (PSD, ω, k). As the number of spacecraft within a constellation increases, the geometry becomes more complicated, and it is harder to find the first Brillouin like zone,…
Atomic carbon [C I](3P1-3P0) mapping of the nearby galaxy M 83
Seta, Masumichi; Salak, Dragan; Nakai, Naomasa +6 more
Atomic carbon (C I) has been proposed to be a global tracer of the molecular gas as a substitute for CO, however, its utility remains unproven. To evaluate the suitability of C I as the tracer, we performed [C I](3P1-3P0) [hereinafter [C I](1-0)] mapping observations of the northern part of the nearby sp…
Spectroscopically Identified Emission Line Galaxy Pairs in the WISP Survey
Hathi, Nimish P.; Teplitz, Harry I.; Bunker, Andrew J. +20 more
We identify a sample of spectroscopically measured emission line galaxy (ELG) Pairs up to z = 1.6 from the Wide Field Camera 3 (WFC3) Infrared Spectroscopic Parallels (WISP) survey. WISP obtained slitless, near-infrared grism spectroscopy along with direct imaging in the J and H bands by observing in the pure-parallel mode with the WFC3 on board t…
Population-based identification of H α-excess sources in the Gaia DR2 and IPHAS catalogues
Maccarone, T. J.; Court, J. M. C.; Knigge, C. +8 more
We present a catalogue of point-like H α-excess sources in the Northern Galactic Plane. Our catalogue is created using a new technique that leverages astrometric and photomeric information from Gaia to select H α-bright outliers in the INT Photometric H α Survey of the Northern Galactic Plane (IPHAS), across the colour-absolute magnitude diagram. …