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Identification of a new γ-ray-emitting narrow-line Seyfert 1 galaxy, at redshift ∼1
Komossa, S.; Yuan, Weimin; Zhou, Hongyan +4 more
We report on the identification of a new γ-ray-emitting narrow-line Seyfert 1 (NLS1) galaxy, SDSS J122222.55+041315.7, which increases the number of known objects of this remarkable but rare type of active galactic nuclei to seven. Its optical spectrum, obtained in the Sloan Digital Sky Survey-Baryon Oscillation Spectroscopic Survey, reveals a bro…
Molecular Oxygen in Oort Cloud Comet 1P/Halley
Altwegg, K.; Rubin, M.; van Dishoeck, E. F. +1 more
Recently, the ROSINA mass spectrometer suite on board the European Space Agency's Rosetta spacecraft discovered an abundant amount of molecular oxygen, O2, in the coma of Jupiter family comet 67P/Churyumov-Gerasimenko of O2/H2O = 3.80 ± 0.85%. It could be shown that O2 is indeed a parent species and that…
Kinematics and host-galaxy properties suggest a nuclear origin for calcium-rich supernova progenitors
Foley, Ryan J.
Calcium-rich supernovae (Ca-rich SNe) are peculiar low-luminosity SNe Ib with relatively strong Ca spectral lines at ∼2 months after peak brightness. This class also has an extended projected offset distribution, with several members of the class offset from their host galaxies by 30-150 kpc. There is no indication of any stellar population at the…
Spectroscopic Observations of an Evolving Flare Ribbon Substructure Suggesting Origin in Current Sheet Waves
Qiu, J.; Longcope, D. W.; Brannon, S. R.
We present imaging and spectroscopic observations from the Interface Region Imaging Spectrograph of the evolution of the flare ribbon in the SOL2014-04-18T13:03 M-class flare event, at high spatial resolution and time cadence. These observations reveal small-scale substructure within the ribbon, which manifests as coherent quasi-periodic oscillati…
Bipolar H II regions - Morphology and star formation in their vicinity. I. G319.88+00.79 and G010.32-00.15
Zavagno, A.; Samal, M. R.; Molinari, S. +9 more
Aims: Our goal is to identify bipolar H ii regions and to understand their morphology, their evolution, and the role they play in the formation of new generations of stars.
Methods: We use the Spitzer-GLIMPSE, -MIPSGAL, and Herschel-Hi-GAL surveys to identify bipolar H ii regions, looking for (ionized) lobes extending perpendicular to de…
Gamma-rays from Type Ia Supernova SN2014J
Sunyaev, R.; Churazov, E.; Bikmaev, I. +8 more
The whole set of INTEGRAL observations of Type Ia supernova SN 2014J, covering the period 19-162 days after the explosion, has been analyzed. For spectral fitting the data are split into early and late periods covering days 19-35 and 50-162, respectively, optimized for 56Ni and 56Co lines. As expected for the early period, mu…
Small-scale and Global Dynamos and the Area and Flux Distributions of Active Regions, Sunspot Groups, and Sunspots: A Multi-database Study
DeLuca, Edward E.; Pevtsov, Alexei A.; Longcope, Dana W. +12 more
In this work, we take advantage of 11 different sunspot group, sunspot, and active region databases to characterize the area and flux distributions of photospheric magnetic structures. We find that, when taken separately, different databases are better fitted by different distributions (as has been reported previously in the literature). However, …
Star formation in z > 1 3CR host galaxies as seen by Herschel
Clements, D. L.; Meisenheimer, K.; Siebenmorgen, R. +15 more
We present Herschel (PACS and SPIRE) far-infrared (FIR) photometry of a complete sample of z> 1 3CR sources, from the Herschel guaranteed time project The Herschel Legacy of distant radio-loud AGN. Combining these with existing Spitzer photometric data, we perform an infrared (IR) spectral energy distribution (SED) analysis of these landmark ob…
Probing the diffuse baryon distribution with the lensing-tSZ cross-correlation
Van Waerbeke, Ludovic; Hinshaw, Gary; Scott, Douglas +3 more
Approximately half of the Universe's baryons are in a form that has been hard to detect directly. However, the missing component can be traced through the cross-correlation of the thermal Sunyaev-Zeldovich (tSZ) effect with weak gravitational lensing. We build a model for this correlation and use it to constrain the extended baryon component, empl…
NOMAD spectrometer on the ExoMars trace gas orbiter mission: part 1—design, manufacturing and testing of the infrared channels
Vandaele, Ann Carine; Neefs, Eddy; Daerden, Frank +46 more