Search Publications
New reduction of old glass astronomical plates of Pallas and Vesta in 1956-1994 based on Gaia DR3 catalogue
Ehgamberdiev, Sh. A.; Dong, S.; Yu, Y. +9 more
Through a key project for intergovernmental international cooperation between Uzbekistan and China, a group of old glass astronomical plates of Pallas and Vesta taken by the TAS033 telescope at Tashkent observation site of Ulugh Beg Astronomical Institute in 1956-1994 have been digitized using the digitizer with sub-micrometer measuring precision …
The impact of dimensionality reduction of ion counts distributions on preserving moments, with applications to data compression
Thompson, B.; da Silva, D.; Bard, C. +3 more
The field of space physics has a long history of utilizing dimensionality reduction methods to distill data, including but not limited to spherical harmonics, the Fourier Transform, and the wavelet transform. Here, we present a technique for performing dimensionality reduction on ion counts distributions from the MMS/FPI instrument using a data-ad…
Study of five eccentric eclipsing binary systems
Zejda, M.; Auer, R. F.; Kolář, J.
In this paper we present the comprehensive analysis of five binary systems: GX Lac, TT Lyr, OGLE LMC-ECL-7641, OGLE LMC-ECL-17660, and OGLE LMC-ECL-17411. With new photometric observations combined with other available data mostly from TESS, MACHO, and OGLE, we calculated new minima timings and study the O - C diagrams. We fitted the light curves …
The nature of the solar wind electron temperature and electron heat flux. II. Case of a spiral interplanetary magnetic field
Salem, Chadi S.; Pulupa, Marc; Hubert, Daniel
Aims: We aim to analyze the solutions of the solar wind electron energy equation in a spherical expansion with a spiral interplanetary magnetic field (IMF), a radial power law of the electron heat flux with a constant index α, and a constant or a smooth increase of the solar wind speed.
Methods: Generic analytical electron temperature pr…
TÜBİTAK TUG T60 ve İstanbul Üniversitesi İST60'ın GAIA Gözlemlerindeki Bazı Kataklismik Değişen Adaylarının Işık Eğrileri
Esenoğlu, Hasan H.; Hamed, Gamal; Dağ, Meryem Kübra
Gaia uyarıları içerisinde 5 adet kataklismik değişen (CV) adayı (Gaia16ahl, 16bnz, 14adn, 16awq ve 21bpe) küçük açıklıklı robotik teleskoplarla (büyük olanlarla da koordineli şekilde) B, V, R süzgeçlerinde ve filtresiz olarak gözlenmiştir. Adayların tanımlamaları şöyledir: 16ahl-CV, 16bnz-bilinmeyen, 14adn-bilinmeyen, 16awq-bilinmeyen ve 21bpe-nov…
SITCoM: SiRGraF Integrated Tool for Coronal dynaMics
Patel, Ritesh; Udhwani, Purvi; Shrivastav, Arpit Kumar
SiRGraF Integrated Tool for Coronal dynaMics (SITCoM) is based on the Simple Radial Gradient Filter used to filter the radial gradient in the white-light coronagraph images and bring out dynamic structures. SITCoM has been developed in Python and integrated with SunPy and can be installed by users with the command pip install sitcom. This enables …
ORIGO: A mission concept to challenge planetesimal formation theories
Mottola, Stefano; Vincent, Jean-Baptiste; Thomas, Nicolas +12 more
Comets are generally considered among the most pristine objects in our Solar System. There have thus been significant efforts to understand these bodies. During the past decades, we have seen significant progress in our theoretical understanding of planetesimal/cometesimals (the precursors of comets) formation. Recent space missions—such as ESA's …
Noise effect of test mass surface roughness in spaceborne gravitational wave detectors
Wang, Shun; Yan, Hao; Miao, Haixing +2 more
The spaceborne gravitational wave detection mission has a demanding requirement for the precision of displacement sensing, which is conducted by the interaction between the laser field and test mass. However, due to the roughness of the reflecting surface of the test mass, the displacement measurement along the sensitive axis suffers a coupling er…
ASASSN-18aan revisited
Nelson, R.; Vagnozzi, A.; Valentini, S.
The light curve of the cataclismic variable ASASSN-18aan is studied using recent observations of the MC589 Observatory, giving an orbital Period and Epoch fully consistent with the data obtained after the discovery are in 2018. Archival data from ASASSN, ZTF and Gaia were used to check if its ares have a quasi-periodic behaviour. A recurrence time…
T Tauri stars in the SuperWASP and NSVS surveys II. Spectral modelling
Munari, U.; Smalley, B.; Kundra, E. +9 more
We present results from long-term spectroscopic monitoring of 21 T-Tauri stars located in the Taurus-Auriga star-forming region (SFR). We combine medium and high-dispersion Echelle spectroscopy obtained at the Stará Lesná, Skalnaté Pleso (both in Slovakia), and Tautenburg (Germany) observatories with low-resolution flux-calibrated spectra from Asi…