Search Publications
Pulse phase-resolved analysis of SMC X-3 during its 2016–2017 super-Eddington outburst
Weng, Shan-Shan; Ge, Ming-Yu; Zhao, Hai-Hui +2 more
The Be X-ray pulsar SMC X-3 underwent an extra long and ultraluminous giant outburst from 2016 August to 2017 March. The peak X-ray luminosity is up to
The broad-band spectrum of the narrow-line Seyfert 1 NGC 4748: from UV to hard X-ray
Vasylenko, A. A.
We report the results obtained by a broad-band (0.5–500 keV) data analysis of narrow-line Seyfert 1 galaxy NGC 4748 observed with an XMM-Newton/PN, INTEGRAL/ISGRI and SWIFT/BAT telescopes. This galaxy has a soft X-ray excess that is typical for the class of narrow-line Seyfert 1. The question of the origin of soft excess in such objects is still u…
Using GALEX-SDSS-PanSTARRS-HST-Gaia to understand post-AGB evolution
Bianchi, Luciana; Casewell, Sarah; Bohlin, Ralph +2 more
Hot WDs in binary systems with a less evolved star are particularly invaluable astrophysical probes, the unevolved companion enabling better derivation of distance and age than is usually possible for post-AGB objects, and therefore also of their radius and luminosity. But hot white dwarfs (WD) are elusive at all wavelengths except the UV (Bianchi…
UV astronomy throughout the ages: a historical perspective
Linsky, Jeffrey L.
Astronomers have long recognized the critical need for ultraviolet imaging, photometry and spectroscopy of stars, planets, and galaxies, but this need could not be satisfied without access to space and the development of efficient instrumentation. When UV measurements became feasible, first with rockets and then with satellites, major discoveries …
Interplanetary type II radio bursts and their association with CMEs and flares
Shanmugaraju, A.; Suresh, K.; Umapathy, S. +2 more
We study the characteristics of the CMEs and their association with the end-frequency of interplanetary (IP)-type-II bursts by analyzing a set of 138 events (IP-type-II bursts–flares–CMEs) observed during the period 1997–2012. The present analysis consider only the type II bursts having starting frequency
X-ray stars observed in LAMOST spectral survey
Shi, Jianrong; Han, Xianming L.; Lu, Hong-peng +1 more
X-ray stars have been studied since the beginning of X-ray astronomy. Investigating and studying the chromospheric activity from X-ray stellar optical spectra is highly significant in providing insights into stellar magnetic activity. The big data of LAMOST survey provides an opportunity for researching stellar optical spectroscopic properties of …
History of globulettes in the Milky Way
Grenman, Tiia; Elfgren, Erik; Weber, Hans
Globulettes are small (radii
GALEX far-ultraviolet observations of metal-poor subdwarfs
Smith, Graeme H.
Far-ultraviolet photometry derived from the GALEX satellite observatory has been compiled for a sample of metal-poor subdwarfs with
The astrometric signal of microlensing events caused by free floating planets
Nucita, Achille A.; De Paolis, Francesco; Hamolli, Lindita +1 more
Astrometric observations of microlensing events can be used to obtain important information about lenses. During these events, the shift of the position of the multiple image centroid with respect to the source star location can be measured. This effect, which is expected to occur on scales from micro-arcseconds to milli-arcseconds, depends on the…
A review of low-energy transfers
Dutt, Pooja
Low-energy transfers (LET) for lunar and interplanetary missions has received immense attention of the scientific community during the last few decades as its importance was understood by the success of JAXA's Hiten, ESA's SMART-1, NASA's GRAIL and ARTHEMIS missions, and several proposals, like the BepiColombo, Multi-Moon Orbiter and Europa Orbite…