Search Publications
Plasma Acceleration on Multiscale Temporal Variations of Electric and Magnetic Fields during Substorm Dipolarization in the Earth'S Magnetotail
Malova, H. V.; Delcourt, D. C.; Petrukovich, A. A. +6 more
New Galactic Multi-Mode Cepheids from the ASAS-SN Survey
Catelan, M.; Hajdu, G.; Jurcsik, J.
A systematic search for multi-mode Cepheids using the database of the ASAS-SN survey has led to the detection of thirteen new double-mode and two triple-mode Cepheids in the Galactic disk. These discoveries have increased the number of Galactic disk multi-mode Cepheids by 33%. One of the new triple-mode variables pulsates simultaneously in the fun…
Spectral analysis of SXP59.0 during its 2017 outburst and properties of the soft excess in X-ray binary pulsars
Tiengo, A.; Mereghetti, S.; Sidoli, L. +3 more
We report the results provided by the XMM-Newton observation of the X-ray binary pulsar SXP59.0 during its most recent outburst in April 2017. The source was detected at fX(0.2-12 keV) = 8 × 10-11erg cm-2 s-1, one of its highest flux levels reported to date. The measured pulse period was Pspin…
Structure of the heliosheath from HSTOF energetic neutral atoms measurements
Hsieh, K. C.; Bzowski, M.; Hilchenbach, M. +4 more
Context. From the year 1996 until now, High energy Suprathermal Time Of Flight sensor (HSTOF) on board Solar and Heliospheric Observatory (SOHO) has been measuring the heliospheric energetic neutral atoms (ENA) flux between ±17° from the ecliptic plane. At present it is the only ENA instrument with the energy range within that of Voyager LECP ener…
Searching for the Young Kinematic Group Associated with HD 166191
Eselevich, M. V.; Sokolov, I. V.; Potravnov, I. S. +1 more
We present the results of our search for the stars kinematically related to the young star HD 166191 surrounded by a warm dust disk. Using data from the GAIA DR1, 2RXS, ALLWISE catalogues and confirming optical spectroscopy, we have identified five stars of age 10 Myr with similar kinematics in a sky region of radius 11° on the periphery of the Sc…
Roche Modeling and Evolutionary History of Multiple Low Mass Contact Binary Systems
Stępień, K.; Alton, K. B.
The Northern Sky Variable Survey (NSVS) has been a rich source of variable stars many of which have only been studied to a limited extent. Herein we describe five eclipsing binary systems that were first detected by the ROTSE-I telescope and ultimately shown to be low mass contact binaries. Photometric data (B, V and Ic) acquired from M…
Single X-ray Bursts and the Model of a Spreading Layer of Accreting Matter over the Neutron Star Surface
Grebenev, S. A.; Chelovekov, I. V.
The excess of the rate of type I X-ray bursts over that expected when the matter fallen between bursts completely burns out in a thermonuclear explosion which is observed in bursters with a high persistent luminosity (4 × 1036 ≲ L X ≲ 2 × 1037 erg s-1) is explained in terms of the model of a spreading …
Baldone 1.2m Telescope Plate Archive - Hidden Reserves of the FON Project
Andruk, V.; Eglitis, I.; Protsyuk, Yu. +3 more
The plate archive of the 1.2 m Baldone telescope (Latvia) has approximately 780 and 4660 astronegatives exposed in 1967-1993 in the U (ZU21 + UG1 filter plates) and V (A600N + ZS17 filter films) closed to Johnson system U and V passbands. Digitization of astronegatives is carried out using the Epson Expression 10000XL scanner, the scanning mode is…
The Carnegie-Chicago Hubble Program: Calibration of the Near-infrared RR Lyrae Period-Luminosity Relation with HST
Kollmeier, Juna A.; Madore, Barry F.; Freedman, Wendy L. +12 more
We present photometry of 30 Galactic RR Lyrae variables taken with HST WFC3/IR for the Carnegie-Chicago Hubble Program. These measurements form the base of the distance-ladder measurements that comprise a pure Population II base to a measurement of H o at an accuracy of 3%. These data are taken with the same instrument and filter (F16…
A star-forming dwarf galaxy candidate in the halo of NGC 4634
Bomans, D. J.; Dettmar, R. -J.; Stein, Y. +3 more
Context. The halos of disk galaxies form a crucial connection between the galaxy disk and the intergalactic medium. Massive stars, H II regions, or dwarf galaxies located in the halos of galaxies are potential tracers of recent accretion and/or outflows of gas, and are additional contributors to the photon field and the gas phase metallicity.
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