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Correlation of gas dynamics and dust in the evolved filament G82.65-02.00
Juvela, M.; Marshall, D. J.; Montier, L. +12 more
Context. The combination of line and continuum observations can provide vital insight into the formation and fragmentation of filaments and the initial conditions for star formation. We have carried out line observations to map the kinematics of an evolved, actively star forming filament G82.65-2.00. The filament was first identified from the Plan…
Catalog of positions and B magnitudes of stars of the part of Kitab northern sky survey (FON) project
Andruk, V. M.; Muminov, M. M.; Yuldoshev, Q. X. +3 more
The works of processing of Kitab's plates of FON project was completed. It was used 1963 plates. The catalogue of equatorial coordinates and B-magnitudes of 13 413 268 stars and galaxies up to B ≤ 17.5m for the epoch 1984.97 was compiled. The Epson Expression 10000XL scanner was used for digitization with the mode 1200 dpi, the size of plates are …
Spiky Structures around Reconnection Exhausts in the Solar Wind
Přech, Lubomír; Němeček, Zdeněk; Šafránková, Jana +1 more
The paper presents for the first time observations of unusual reconnection events in the solar wind. In all solar wind types, we identify magnetic reconnection exhausts accompanied by one or two side jets. This complex structure is created around a single current sheet and the jet(s) oriented in the same direction as the main exhaust is (are) spat…
An application of the KNND method for detecting nearby open clusters based on Gaia-DR1
Gao, Xin-Hua
This paper presents a preliminary test of the k-th nearest neighbor distance (KNND) method for detecting nearby open clusters based on Gaia-DR1. We select 38 386 nearby stars (< 100 {pc}) from the Gaia-DR1 catalog, and then use the KNND method to detect overdense regions in three-dimensional space. We find two overdense regions (the Hyades and …
CO concentration in the upper stratosphere and mesosphere of Titan from VIMS dayside limb observations at 4.7 µm
D'Aversa, E.; López-Valverde, M. A.; Funke, B. +6 more
During the last 30 years, many works have focused on the determination of the CO abundance in Titan's atmosphere, but no measurement above 300 km has been done yet due to the faint signal of CO. Nevertheless, such measurements are particularly awaited as a confirmation of photochemical models predictions that CO is uniformly mixed in the whole atm…
Tandem Swift and INTEGRAL Data to Revisit the Orbital and Superorbital Periods of 1E 1740.7-2942
Castro, Manuel; Stecchini, Paulo Eduardo; Jablonski, Francisco +2 more
The black hole candidate 1E 1740.7-2942 is one of the strongest hard X-ray sources in the Galactic Center region. No counterparts in longer wavelengths have been identified for this object yet. The presence of characteristic timing signatures in the flux history of X-ray sources has been shown to be an important diagnostic tool for the properties …
On the methanol emission detection in the TW Hya disc: the role of grain surface chemistry and non-LTE excitation
Henning, Th.; Sobolev, A. M.; Semenov, D. A. +3 more
The recent detection of gas-phase methanol (CH3OH) lines in the disc of TW Hya by Walsh et al. provided the first observational constraints on the complex O-bearing organic content in protoplanetary discs. The emission has a ring-like morphology, with a peak at ∼30-50 au and an inferred column density of ∼3-6 × 1012 cm-2…
A Multiply-Imaged z ∼ 6.3 Lyman Alpha Emitter candidate behind Abell 2261
Östlin, Göran; Melinder, Jens; Klessen, Ralf S. +6 more
While the Lyman α (Ly α) emission line serves as an important tool in the study of galaxies at z ≲ 6, finding Ly α emitters (LAE) at significantly higher redshifts has been more challenging, probably because of the increasing neutrality of the intergalactic medium above z ∼ 6. Galaxies with extremely high rest-frame Ly α equivalent widths, EW(Ly α…
Enabling data science in the Gaia mission archive: The present-day mass function and age distribution
Sarro, L. M.; Berihuete, A.; Julbe, F. +2 more
Recent advances in large scale computing architectures enable new opportunities to extract value out of the vast amounts of data being currently generated. However, their successful adoption is not straightforward in areas like science, as there are still some barriers that need to be overcome. Those comprise (i) the existence of legacy code that …
The X-ray decay of the ultraluminous supernova SN 1978K in NGC 1313
Weng, Shan-Shan; Zhao, Hai-Hui; Ng, C. -Y.
The Type IIn supernova (SN) 1978K in the nearby galaxy NGC 1313 has remained bright in multiwavelengths for more than ∼25 yr. The archival data of SN 1978K collected with ROSAT, ASCA, XMM-Newton and Chandra from 1990 to 2006 show no significant variation of the soft X-ray emission but a hint of flux decrease in hard X-rays. In this work, we perfor…