Search Publications
Automatic Detection and Tracking of Plumes from 67P/Churyumov-Gerasimenko in Rosetta/OSIRIS Image Sequences
Sierks, Holger; Thompson, David R.; Brown, David +2 more
Solar system bodies such as comets and asteroids are known to eject material from their surface in the form of jets and plumes. Observations of these transient outbursts can offer insight into the inner workings and makeup of their originating body. However, the detection of and response to these events has thus far been manually controlled by gro…
Astrometric planet search around southern ultracool dwarfs. IV. Relative motion of the FORS2/VLT CCD chips
Sahlmann, J.; Lazorenko, P. F.
We present an investigation of the stability of the two chips in the FORS2 camera CCD mosaic on the basis of astrometric observations of stars in 20 sky fields, some of which were monitored for four to seven years. We detected a smooth relative shear motion of the chips along their dividing line that is well approximated by a cubic function of tim…
The Sejong Open cluster Survey (SOS) VI. A small star-forming region in the high Galactic latitude molecular cloud MBM 110
Song, Inseok; Bessell, Michael S.; Sung, Hwankyung
We present optical photometric, spectroscopic data for the stars in the high Galactic latitude molecular cloud MBM 110. For the complete membership selection of MBM 110, we also analyse Wide-field Infrared Survey Explorer(WISE) mid-infrared data and Gaia astrometric data. Membership of individual stars is critically evaluated using the data mentio…
Cloud G074.11+00.11: a stellar cluster in formation
Kim, Kee-Tae; Liu, Sheng-Yuan; Zhang, Qizhou +9 more
Context. We present molecular line and dust continuum observations of a Planck-detected cold cloud, G074.11+00.11. The cloud consists of a system of curved filaments and a central star-forming clump. The clump is associated with several infrared sources and H2O maser emission.
Aims: We aim to determine the mass distribution and gas…
Faint, high proper motion star candidates selected from the SDSS and PS1 catalogues
Ofek, Eran O.; Segev, Noam
High proper motion stars probe several extreme stellar populations, including nearby objects, Galactic halo stars, and hypervelocity stars. Extending the search for high proper motion stars, to faint limits can increase their numbers and help to identify interesting targets. We conduct a search for faint (rSDSS > 19.5 mag) high prope…
Accretion disks in symbiotic stars
Luna, G. J. M.
The nature of accretion in symbiotic binaries, in which the red giant transfers material to a white dwarf (WD) companion, has been difficult to uncover. The accretion flows in a symbiotic binary are most clearly observable, however, when there is no quasi-steady shell burning on the WD to hide them. Through observations in the high energy regime, …
Search for Possibly Evolutionary Linked Globular and Open Clusters
Bobylev, V. V.; Bajkova, A. T.
Based on a large sample of 133 Galactic globular clusters we obtained a new estimate of the frequency of globular-cluster impacts onto the Galactic plane, which we found to be equal to three events per 1 Myr. Our computations involving new kinematical data do not support the well-known hypothesis about the possible origin of the open cluster Steph…
Investigation of a Confined C-Class Flare in an Arch Filament System Close to a Regular Sunspot
Louis, Rohan Eugene
A moderate C1.1 class confined flare is investigated here, which occurred on 24 September 2013 at 22:56 UT, in an arch filament system close to a regular, unipolar sunspot. Spectropolarimetric observations from the Tenerife Infrared Polarimeter at the 70-cm German Vacuum Tower Telescope were combined with data from the Helioseismic Magnetic Imager…
SEROB1A Association in DR2 GAIA Epoch
Chentsov, E. L.
In the light of new astrometric and available spectroscopic data, the structure and kinematics of the SerOB1A association are discussed and the issue of correcting its boundaries is put.
Large-scale altitude distribution profile of auroral parallel electric potentials: A statistical analysis of Cluster data
Sadeghi, Soheil; Emami, M. Reza
It is generally believed that the heart of the Auroral Acceleration Region (AAR) is located between 5000 and 8000 km altitude above the auroral oval. Various altitude distribution profiles are suggested by different theories, including the transition layer model, which predicts that the strongest electric fields can be found at about 1 RE