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Studying young stellar populations in G345.5+1.5 molecular cloud
Baume, G.; Borissova, J.; Ramirez Alegria, S.
Using different sky surveys, we studied IRAS sources and embedded clusters located in the G345.5+1.5 region. Our analysis comprises multi-wavelength (optical to radio) data, exploited using various methods: photometry, near-infrared spectroscopy for ten stars in the embedded cluster DBS-114, and astrometry. We estimated the main parameters of the …
First Global Lunar Magnesium and Aluminum Abundance Maps Derived Using Chandrayaan-1 and Chandrayaan-2 Data
Wöhler, C.; Bhatt, M.; Narendranath, S. +3 more
CLASS-derived abundances of Mg and Al were used as ground truth and an empirical multivariate linear regression model developed for M3 global coverage.
Satellite Confirms the Principle of Falling
Brax, Philippe
The MICROSCOPE satellite experiment has tested the equivalence principle with an unprecedented level of precision.
Observations of NEO and Main Belt asteroids in 2018-2021 using the Baldone Schmidt telescope
Eglitis, I.; Bule, A.; Sokolova, A. +1 more
During 2018–2021 in the Baldone observatory, 49 new asteroids were discovered and more than 6000 astrometric positions for 1122 asteroids were published in MPC circulars. In this period in 221 observation nights, 5544 CCD images were obtained, which covered 648 square degrees of sky. Of them, about 1000 CCD images were devoted to studying the dyna…
Correction to: Observation of a Flare and Filament Eruption in Lyman-α on 8 September 2011 by the PRoject for OnBoard Autonomy/Large Yield Radiometer (PROBA2/LYRA)
Kretzschmar, M.; Dammasch, I. E.; Dominique, M. +3 more
On the dynamical and morphological state of the CHEX-MATE clusters
Lovisari, Lorenzo; Ettori, Stefano; Campitiello, Maria Giulia +1 more
The CHEX-MATE sample was built to provide an overview of the statistical properties of the underlying cluster population and to set the stage for future X-ray missions. In this work, we perform a morphological analysis of the 118 clusters included in the sample with the aim to provide a classification of their dynamical state which will be useful …
Current Sheet Thinning in the Wake of a Bubble Injection
Nakamura, Rumi; Yang, Jian; Cui, Jun +3 more
A crucial property of the substorm growth phase is the current sheet thinning, which is often attributed to adiabatic convection. Injecting low-entropy bubbles reduce pressure-balance inconsistencies and restore current sheet thickness to its initial value. Recent observations from Cluster and MMS showed additional thinning of the current sheet in…
Tripolar guide magnetic fields due to island coalescence in solar wind current sheets: Simulation and theory
Newman, David L.; Eriksson, Stefan; Lapenta, Giovanni
Reconnecting current sheets (CSs) in the solar wind near 1 AU have been previously identified that exhibit a modified Hall magnetic field perturbation of the nominal guide field characterized by a "tripolar" structure with depressions on both sides of a central maximum [Eriksson et al., Astrophys. J. 805, 43 (2015)]. Such CSs were inferred to cont…
Co-rotating Solar Wind Disturbances in Radio Sounding Data and Local Measurements
Efimov, A. I.; Smirnov, V. M.; Chashei, I. V. +1 more
In this paper, we present the results of two series of experiments on radio sounding of near-solar plasma by the signals of the Mars Express and Venus Express spacecraft in 2006 and Mars Express in 2008. The radio sounding data are compared with measurements of the proton concentration near the Earth's orbit on the Wind satellite. This analysis sh…
The first photometric analysis study of the GW Psc binary system
Tanrıver, Mehmet; Bulut, Ahmet
The first photometric solution in the B , V ,Rc and Ic filters of the short period GW Psc eclipsing binary is presented based on new ground-based CCD photometric observations. We analysed the BVRI photometric light curves of the system, using Phoebe0.31a, a binary star modelling program, with the Wilson and Devinney (Wilson a…