Search Publications
EREBUS: the EuRopean Extinction BUmp Survey
Shipman, R. F.; Kargl, G.; Skalidis, R. +14 more
Dust in the Interstellar Medium (ISM) is intimately linked to the life cycle of stars. Despite being of such fundamental importance to galaxy evolution, the dynamic behaviour and composition of the ISM are not yet fully understood. Observations of reddened Milky Way OB stars have revealed a strong UV extinction feature around 2175 Å and a precipit…
Observation of Gaia (DR2) Red and White Dwarf Binary Stars in the Solar Neighborhood (Abstract)
Wasson, R.
(Abstract only) The Gaia satellite combines astrometric, parallax, photometric, and spectroscopic measurements of stellar propertiesówith greater accuracy than ever before. In 2018 Gaia Data Release 2 (DR2) made preliminary but consistent data available for an extraordinary number of stars: 1.3 Billion!
Fractal dimension in star formation regions
Canavesi, T.; Hurtado, S.
Several two-dimensional studies in spiral galaxies show that HII star formation regions have a fractal distribution, with a fractal dimension of approximately 2.3. In this work, the fractal dimension is calculated through the box-counting method implemented in an R code. The innovation of the work lies in calculating the fractal dimension directly…
Follow‑up imaging observations of comet 2I/Borisov
Mugrauer, Markus; Schlagenhauf, Saskia; Bischoff, Richard +3 more
Follow‑up imaging observations of the first detected interstellar comet 2I/Borisov are presented, which were carried out with the Schmidt‑Teleskop‑Kamera at the University Observatory Jena in 11 observing epochs in October and November 2019. The orbital solution of the comet, derived from the obtained astrometric measurements, confirms its highly …
Changes of plasma parameters in Earth magnetosphere tail during substorm initialization
Grigorenko, E. E.; Kronberg, E. A.; Kozak, L. V. +3 more
The MICROSCOPE space mission to test the Equivalence Principle
Métris, Gilles; Rodrigues, Manuel; Touboul, Pierre +2 more
Study of the Binary Star ADS 7251 by Observations on the 65-cm Refractor at Pulkovo from 1962-2018
Romanenko, L. G.; Izmailov, I. S.; Shakht, N. A. +1 more
Results are presented from a study of the binary star ADS 7251 (STF 1321) based on a uniform series of observations on the 65-cm refractor at Pulkovo from 1962 through 2018. The errors in the yearly average positions ρ and θ are equal to 0''.004 and 0°.02 for the photographic and 0."003 and 0.°01 for the CCD observations. A new orbit is calculated…
Absolute Dimensions of the Unevolved F-type Eclipsing Binary BT Vulpeculae
Torres, Guillermo; Fekel, Francis C.; Muterspaugh, Matthew W. +1 more
We report extensive differential V-band photometry and high-resolution spectroscopy for the 1.14 day, detached, double-lined eclipsing binary BT Vul (F0+F7). Our radial-velocity monitoring and light-curve analysis lead to absolute masses and radii of ${M}_{1}=1.5439\pm 0.0098\,{{ \mathcal M }}_{\odot }^{{\rm{N}}}$ and ${R}_{1}=1.536\pm 0.018\,{{ \…
Seven New Eclipsing Binaries
Khruslov, A. V.; Kusakin, A. V.; Reva, I.
Conceptual Remote Distance Measurement with a Double-Slit Interference
Zou, Yuan-Chuan
Distance measurement is crucial to astronomy. Here, we suggest a new conceptual method to measure the distance by using a local instrument. By engaging the double-slit interference and by considering the phase information of the light, the position of the intensity maximum is related to the distance of the source. Consequently, the precise measure…