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Elucidating the global distribution of reprocessing gas in NGC 1194
Turner, T. J.; Kraemer, S. B.; Reeves, J. N. +3 more
A joint XMM-Newton and NuSTAR observation was conducted for the bright, local Seyfert 1.9 galaxy, NGC 1194. The hard spectral form of this active galactic nucleus (AGN) was modelled using the toroidal reprocessor MYTORUS. The decoupled model form provides a good description of the spectrum, with reflection arising from gas with a global average co…
Martian Lander Radio Science Data Calibration for Mars Troposphere
Le Maistre, S.
The tropospheric propagation effect is one of several sources of error in radio science measurements. Systematically calibrated for the Earth troposphere disturbances, the ranging and Doppler data provided by the Martian landers have not been corrected so far for Mars troposphere effects. These effects were considered negligible because the Mars a…
Dust extinction towards the type Ia supernova 2012cu in NGC 4772
Gao, Jian; Jiang, Biwei; Li, Jun +2 more
Using photometric and spectroscopic data of Supernova (SN) 2012cu, a fairly reddened type Ia supernova, we derived its color excess curves and probed the dust extinction in its host galaxy, NGC 4772. In order to derive the extinction as a function of wavelength (i.e., Aλ), we model the color excess curves of SN 2012cu in terms of dust m…
In Search of an Interface between Warm and Hot Gas within the Local Bubble
Jenkins, Edward B.; Gry, Cécile
We have examined UV spectra recorded by the Space Telescope Imaging Spectrograph on the Hubble Space Telescope for three stars, HD32309, 41 Ari, and η Tel, that are located well inside the boundary of the Local Hot Bubble in our search for absorption features of Si IV, C IV, and N V that could reveal the presence of an interface between the local …
Proton-proton collisional age to order solar wind types
Wimmer-Schweingruber, Robert F.; Berger, Lars; Heidrich-Meisner, Verena
Context. The properties of a solar wind stream are determined by its source region and by transport effects. Independently of the solar wind type, the solar wind measured in situ is always affected by both. This means that reliably determining the solar wind type from in situ observations is useful for the analysis of its solar origin and its evol…
A Multiwavelength Analysis of the Long-duration Flare Observed on 15 April 2002
Mrozek, Tomasz; Kepa, Anna; Sylwester, Barbara +2 more
We present a multiwavelength analysis of the long-duration flare observed on 15 April 2002 (soft X-ray peak time at 03:55 UT, SOL2002-04-15T03:55). This flare occurred on the disk (S15W01) in NOAA 9906 and was observed by a number of space instruments including the Extreme-Ultraviolet Imaging Telescope on the Solar and Heliospheric Observatory (SO…
An infrared study of the high-mass, multistage star-forming region IRAS 12272-6240
Elia, Davide; Tapia, Mauricio; Persi, Paolo +1 more
IRAS 12272-6240 is a complex star-forming region with a compact massive dense clump (DC) and several associated masers, located at a well-determined distance of d = 9.3 kpc from the Sun. For this study, we obtained sub-arcsec broad- and narrow-band near-infrared (near-IR) imaging and low-resolution spectroscopy with the Baade/Magellan telescope an…
Formation of Two Homologous Transequatorial Loops
Pevtsov, Alexei A.; Song, Yongliang; Su, Jiangtao +4 more
The formation mechanism of two homologous transequatorial loops (TLs) of July 7-8, 1999 (SOL1999-07-07) is studied. The TLs connected active region AR 8614 from the northern hemisphere to AR 8626 in the southern hemisphere. The first TL appeared as a distinct structure at 12:49 UT on July 7, the second TL appeared at 06:21 UT, on July 8. Important…
Studies of Exoplanets with Candidate TOI 717.01 and Confirmed HAT-P-3b (Abstract)
Nair, S.; Tock, K.; Koodli, K. +1 more
(Abstract only) Images of the exoplanets TOI 717.01, Qatar-8 b, and HAT-P-3 b were requested in the w-filter from the Las Cumbres Observatory 0.4-meter telescopes. Of these requests, images were taken of TOI 717.01 and HAT-P-3 b and were reduced using the EXOplanet Transit Interpretation Code (EXOTIC) software, as well as 6 photometric algorithms …
Physical Mechanism of a Solar Flare Based on the Accumulation of the Energy in the Magnetic Field of the Current Sheet in the Solar Corona
Podgorny, I. M.; Podgorny, A. I.
During a solar flare, the magnetic energy of ~1032 erg is released in a few dozens of minutes. The invariability of the magnetic field on the solar surface during flares proves the appearance of a flare in the corona. An analysis of the dynamics of the electron temperature of the solar atmosphere provides independent evidence of the cor…