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The soft γ-ray pulsar population: a high-energy overview
Kuiper, L.; Hermsen, W.
At high-energy γ-rays (>100 MeV), the Large Area Telescope (LAT) on the Fermi satellite already detected more than 145 rotation-powered pulsars (RPPs), while the number of pulsars seen at soft γ-rays (20 keV-30 MeV) remained small. We present a catalogue of 18 non-recycled RPPs from which presently non-thermal pulsed emission has been securely …
Systematic Non-LTE Study of the -2.6 < [Fe/H] < 0.2 F and G dwarfs in the Solar Neighborhood. I. Stellar Atmosphere Parameters
Zhang, H. -W.; Chen, Y.; Shi, J. -R. +9 more
We present atmospheric parameters for 51 nearby F and G dwarf and subgiant stars uniformly distributed over the -2.60< [{Fe}/{{H}}]< +0.20 metallicity range that is suitable for the Galactic chemical evolution research. Lines of iron in the two ionization stages, Fe I and Fe II, were used to derive a homogeneous set of effective temperatures…
Implications for the Formation of Blue Straggler Stars from HST Ultraviolet Observations of NGC 188
Sills, Alison; Knigge, Christian; Leigh, Nathan +3 more
We present results of a Hubble Space Telescope (HST) far-ultraviolet (FUV) survey searching for white dwarf (WD) companions to blue straggler stars (BSSs) in open cluster NGC 188. The majority of NGC 188 BSSs (15 of 21) are single-lined binaries with properties suggestive of mass-transfer formation via Roche lobe overflow, specifically through an …
The Sizes of Massive Quiescent and Star-forming Galaxies at z ∼ 4 with ZFOURGE and CANDELS
Papovich, Casey; Kacprzak, Glenn G.; Glazebrook, Karl +17 more
We study the rest-frame ultraviolet (UV) sizes of massive (∼ 0.8× {10}11{M}⊙ ) galaxies at 3.4≤slant z\lt 4.2, selected from the FourStar Galaxy Evolution Survey, by fitting single Sérsic profiles to Hubble Space Telescope/WFC3/F160W images from the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey. Massive quies…
Detection of argon in the coma of comet 67P/Churyumov-Gerasimenko
Wurz, P.; Bochsler, P.; Altwegg, K. +28 more
Where do the 3.5 keV photons come from? A morphological study of the Galactic Center and of Perseus
Profumo, Stefano; Jeltema, Tesla; Carlson, Eric
We test the origin of the 3.5 keV line photons by analyzing the morphology of the emission at that energy from the Galactic Center and from the Perseus cluster of galaxies. We employ a variety of different templates to model the continuum emission and analyze the resulting radial and azimuthal distribution of the residual emission. We then perform…
Large Solar Energetic Particle Events Associated with Filament Eruptions Outside of Active Regions
Gopalswamy, N.; Yashiro, S.; Mäkelä, P. +4 more
We report on four large filament eruptions (FEs) from solar cycles 23 and 24 that were associated with large solar energetic particle (SEP) events and interplanetary type II radio bursts. The post-eruption arcades corresponded mostly to C-class soft X-ray enhancements, but an M1.0 flare was associated with one event. However, the associated corona…
High-J CO Sleds in Nearby Infrared Bright Galaxies Observed By Herschel/PACS
Lutz, D.; Genzel, R.; Poglitsch, A. +16 more
We report the detection of far-infrared (FIR) CO rotational emission from nearby active galactic nuclei (AGNs) and starburst galaxies, as well as several merging systems and Ultra-Luminous Infrared Galaxies (ULIRGs). Using the Herschel Photodetector Array Camera and Spectrometer (PACS), we have detected transitions in the Jupp = 14-30 r…
APEX-CHAMP+ high-J CO observations of low-mass young stellar objects. IV. Mechanical and radiative feedback
Nagy, Z.; van der Marel, N.; van Dishoeck, E. F. +14 more
Context. During the embedded stage of star formation, bipolar molecular outflows and UV radiation from the protostar are important feedback processes. Both processes reflect the accretion onto the forming star and affect subsequent collapse or fragmentation of the cloud.
Aims: Our aim is to quantify the feedback, mechanical and radiative, for…
A possible explanation of low energy γ-ray excess from galactic centre and Fermi bubble by a Dark Matter model with two real scalars
Prasad Modak, Kamakshya; Majumdar, Debasish; Rakshit, Subhendu
We promote the idea of multi-component Dark Matter (DM) to explain results from both direct and indirect detection experiments. In these models as contribution of each DM candidate to relic abundance is summed up to meet WMAP/Planck measurements of ΩDM, these candidates have larger annihilation cross-sections compared to the single-comp…