Search Publications
Quiet-Sun Explosive Events Observed in He II λ304 with MOSES-06
Kankelborg, Charles C.; Rust, Thomas
In this paper the unique data from the Multi-Order Solar Extreme-Ultraviolet Spectrograph (MOSES) are used to investigate transition region explosive events in the He II λ304 spectral line. Particular attention is paid to two example events: one blueshifted jet and one bidirectional jet. Observations suggest that these events consist exclusively o…
Optical design of the High Resolution Imaging Channel of SIMBIO-SYS: publisher's note
Cremonese, Gabriele; Palumbo, Pasquale; Zusi, Michele +4 more
The stellar host in star-forming low-mass galaxies: Evidence for two classes
Muñoz-Tuñón, C.; Méndez-Abreu, J.; Lumbreras-Calle, A.
Context. The morphological evolution of star-forming galaxies provides important clues to understand their physical properties, as well as the triggering and quenching mechanisms of star formation.
Aims: We analyze the morphology of galaxies hosting star-forming events at low redshift (z < 0.36). We aim at connecting morphology and star-fo…
Chandra Observations of the AS0295 Cluster
Hughes, John P.; Pascut, Aurelia
We present deep (205 ks) Chandra observations of the AS0295 binary merging cluster (z = 0.30). In the X-ray image, the secondary component is clearly visible as a surface brightness peak, while the primary cluster has a flatter distribution. We found cool gas (∼6 keV) associated with the secondary, while the central temperature of the primary does…
Reconstructing the weak lensing magnification distribution of type Ia supernovae
Wang, Yun; Zhai, Zhongxu
Weak lensing of type Ia supernovae (SNe Ia) is a systematic uncertainty in the use of SNe Ia as standard candles, as well as an independent cosmological probe, if the corresponding magnification distribution can be extracted from data. We study the peak brightness distribution of SNe Ia in the Pantheon sample and find that the high-z subsample sho…
New precise astrometric positions of Himalia in 2016-2018 based on Gaia DR2
Cheng, X.; Zhang, H. Y.; Yan, D. +5 more
Himalia is the largest irregular satellite of Jupiter. A total of 267 new observed positions of Himalia in the period 2016-2018 were collected by the 1.0 m telescopes at Yunnan Astronomical Observatory during 10 nights. Thanks to the high-quality reference catalogue Gaia DR2 and suitable processing methods for images (ie. image enhancement techniq…
CCD astrometric observations of 2017 VR12, Camillo and Midas
Su, Jie; Wang, Jian-Cheng; Zhang, Yi-Gong +2 more
We have observed three near-Earth objects (NEOs), 2017 VR12, Camillo and Midas, during 2018. The observations were made with the 1-m telescope, operated by Yunnan Observatories, over two nights. Their precise astrometric positions are derived from 989 CCD observations. The theoretical positions of asteroids are retrieved from the Jet Propulsion La…
Interplay between physics and geometry in Balmer filaments: the case of SN 1006
Raymond, J. C.; Bandiera, R.; Morlino, G. +1 more
The analysis of Balmer-dominated emission in supernova remnants is potentially a very powerful way to derive information on the shock structure, on the physical conditions of the ambient medium and on the cosmic ray acceleration efficiency. However, the outcome of models developed in plane-parallel geometry is usually not easily comparable with th…
CCD Measurements of Double and Multiple Stars at ASV and NAO Rozhen in 2017 and 2018
Cvetković, Zorica; Pavlović, Rade; Boeva, Svetlana
We give the results of CCD observations for 789 double or multiple stars obtained during 2017 and 2018. These observations were carried out at both the Serbian Astronomical Station on the mountain of Vidojevica (ASV) and the Bulgarian National Astronomical Observatory at Rozhen (NAOR). They were performed using three telescopes, the 1.4 and 0.6 m …
X-Ray Spectral Evolution of PSR J2032+4127 during the 2017 Periastron Passage
Kong, A. K. H.; Tam, P. H. T.; Cui, Y. +3 more
We report X-ray data analysis results obtained from Chandra, XMM-Newton, Nuclear Spectroscopic Telescope Array Mission (NuSTAR), and Swift observations of PSR J2032+4127 taken before, during, and after the periastron on 2017 November 13. We found the first clear evidence of a change in the X-ray spectral index over the passage period, thanks to a …