Search Publications
Three-dimensional Oscillations of 21 Halo Coronal Mass Ejections Using Multi-spacecraft Data
Moon, Y. -J.; Lee, Harim; Nakariakov, V. M. +3 more
We investigate the 3D structure of kinematic oscillations of full halo coronal mass ejections (FHCMEs) using multi-spacecraft coronagraph data from two non-parallel lines of sight. For this, we consider 21 FHCMEs which are simultaneously observed by the Solar and Heliospheric Observatory and the Solar TErrestrial RElations Observatory A or B, from…
IRAS 22150+6109 - a young B-type star with a large disc
Zakhozhay, Olga V.; Manset, Nadine; Miroshnichenko, Anatoly S. +4 more
We present the results of a spectroscopic analysis and spectral energy distribution (SED) modelling of the optical counterpart of the infrared source IRAS 22150+6109. The source was suggested to be a Herbig Be star located in the star-forming region L 1188. Absorption lines in the optical spectrum indicate a spectral type B3, while weak Balmer emi…
Comparison of Sensitivities of Semiconductor (HPGe) and Scintillation (CeBr3) Detectors in the Measurement of Gamma Spectra Induced by Neutrons in the Model of Planetary Soil
Mitrofanov, I. G.; Golovin, D. V.; Kozyrev, A. S. +12 more
The results of neutron-activation measurements performed using the model of planetary soil and detectors based on high-purity germanium (HPGe) and cerium bromide (CeBr3) are reported. Gamma lines lying in the energy range from 200 keV to 8 MeV are used as indicators to compare these two types of detectors in experiments with the model i…
Membership determination of open clusters based on a spectral clustering method
Gao, Xin-Hua
We present a spectral clustering (SC) method aimed at segregating reliable members of open clusters in multi-dimensional space. The SC method is a non-parametric clustering technique that performs cluster division using eigenvectors of the similarity matrix; no prior knowledge of the clusters is required. This method is more flexible in dealing wi…
NuSTAR view of the central region of M31
Stiele, H.; Kong, A. K. H.
Our neighbouring large spiral galaxy, the Andromeda galaxy (M31 or NGC 224), is an ideal target to study the X-ray source population of a nearby galaxy. NuSTAR observed the central region of M31 in 2015 and allows studying the population of X-ray point sources at energies higher than 10 keV. Based on the source catalogue of the large XMM-Newton su…
Milky Way globular cluster metallicity and low-mass X-ray binaries: the red giant influence
Barmby, P.; Vulic, N.; Gallagher, S. C.
Galactic and extragalactic studies have shown that metal-rich globular clusters (GCs) are approximately three times more likely to host bright low-mass X-ray binaries (LMXBs) than metal-poor GCs. There is no satisfactory explanation for this metallicity effect. We tested the hypothesis that the number density of red giant branch (RGB) stars is lar…
High-latitude dust clouds LDN 183 and LDN 169: distances and extinctions
Munari, U.; Andersson, B. -G.; Corbally, C. J. +9 more
Interstellar extinction is investigated in a 2°× 2° area containing the dust and molecular clouds LDN 183 (MBM 37) and LDN 169, which are located at RA = 15h 54m, Dec = - 3°. The study is based on a photometric classification in spectral and luminosity classes of 782 stars selected from the catalogs of 1299 stars down to V = …
Large-scale properties of the clump mass function
Elia, D.; Schisano, E.; Molinari, S. +1 more
The mass function of molecular cloud clumps and cores is widely used to compare the results of numerical simulations with the observations adopting different prescriptions for star formation. However, our ability to test different theories relies critically on our ability to measure it accurately and interpret it confidently. From an observational…
Detection of a Star-forming Galaxy in the Center of a Low-mass Galaxy Cluster
Lovisari, Lorenzo; Andrade-Santos, Felipe; Jones, Christine +4 more
Brightest Cluster Galaxies (BCGs) residing in the centers of galaxy clusters are typically quenched giant ellipticals. A recent study hinted that star-forming galaxies with large disks, so-called superluminous spirals and lenticulars, are the BCGs of a subset of galaxy clusters. Based on the existing optical data it was not possible to constrain w…
Mutual event observations of solar system objects by SRC on Mars Express. Analysis and release of observations
Willner, K.; Ziese, R.
Context. Both Martian moons, Phobos and Deimos, have been observed during several imaging campaigns by the Super Resolution Channel (SRC) on the Mars Express probe. Several tens of images are obtained during mutual event observations - when the Martian moons are both observed or together with another solar system body. These observations provide n…