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Infrared Photometric Study of Wolf-Rayet Galaxies
Chen, P. S.; Yang, X. H.; Liu, J. Y. +1 more
We collected observational data on 781 Wolf-Rayet (WR) galaxies from the literature to photometrically study their infrared properties measured by the 2MASS, WISE, IRAS, AKARI, and Herschel missions. It is found that in the 1-5 µm range the radiations of WR galaxies are dominated by the free-free emissions from the stellar winds and the circ…
TYC 5353-1137-1: an enigmatic Doubly Periodic Variable of semiregular amplitude
Rosales, J. A., Mennickent, R. E.
Global Maps of Energetic Ions in Saturn's Magnetosphere
Mitchell, D. G.; Carbary, J. F.; Hamilton, D. C.
The Magnetospheric Imaging Instrument/Charge Energy Mass Spectrometer onboard the Cassini spacecraft measured suprathermal H+ and water group (W+) ions during the 13-year mission from 2004 to 2017. This paper generates statistical maps of pulse height analyzed fluxes for 3.24-3.34 keV H+ and 8.79-9.05 keV W+
Modeling of Magnetic Dipolarizations and Turbulence in Earth's Magnetotail as Factors of Plasma Acceleration and Transfer
Malova, H. V.; Popov, V. Yu.; Petrukovich, A. A. +4 more
Modelling the diffuse dust emission around Orion
Shalima, P.; Gogoi, Rupjyoti; Saikia, Gautam
We have studied the diffuse radiation in the surroundings of M42 using photometric data from the Galaxy Evolution Explorer (GALEX) in the far-ultraviolet (FUV) and infrared observations of the AKARI space telescope. The main source of the FUV diffuse emission is the starlight from the Trapezium stars scattered by dust in front of the nebula. We in…
Serendipitous X-Ray Sources in the Chandra HRC Field around Alpha Centauri
Ayres, Thomas R.
For more than a decade, Alpha Centauri AB (G2 V+K1 V) has been observed by Chandra, in a long-term program to follow coronal (T ∼ 106 K) activity cycles of the two sunlike stars. Over 2008.4-2017.8, 19 HRC-I exposures were taken, each about 10 ks in duration, and spaced about six months apart. Beyond monitoring the AB X-ray luminosities…
KIC 2568888: To Be or Not to Be a Binary
García, R. A.; De Ridder, J.; Mints, A. +4 more
In cases where both components of a binary system show oscillations, asteroseismology has been proposed as a method to identify the system. For KIC 2568888, observed with Kepler, we detect oscillation modes for two red giants in a single power-density spectrum. Through an asteroseismic study we investigate if the stars have similar properties, whi…
Multiwavelength approach to classifying transient events in the direction of M 31
Kong, Albert K. H.; Kupfer, Thomas; Laher, Russ R. +4 more
Context. In the hunt for rare time-domain events, it is important to consider confusing exotic extragalactic phenomena with more common Galactic foreground events.
Aims: We show how observations from multiple wavebands, in this case optical and X-ray observations, can be used to facilitate the distinction between the two.
Methods: We dis…
First Ten Years of Hinode Solar On-Orbit Observatory
Shimizu, Toshifumi; Kubo, Masahito; Imada, Shinsuke
Solar Microflares Observed by SphinX and RHESSI
Mrozek, Tomasz; Kepa, Anna; Sylwester, Barbara +4 more
In 2009, the Russian Complex Orbital Observations Near-Earth of Activity of the Sun (CORONAS-Photon) spacecraft was launched, carrying the Polish Solar PHotometer In X-rays (SphinX). The SphinX was most sensitive in the spectral range 1.2 - 15 keV, thus an excellent opportunity appeared for comparison with the low-energy end of Ramaty High Energy …