Search Publications
Study of the \boldsymbol{\mu}
Semenko, E. A.; Yakunin, I. A.; Ryabchikova, T. A. +8 more
We present a refined speckle-interferometric orbit of a binary system
Electron Densities of Transition Region Loops Derived from IRIS O IV Spectral Data
Fu, Hui; Xia, Lidong; Huang, Zhenghua +4 more
Loops are fundamental structures in the magnetized atmosphere of the Sun. Their physical properties are crucial for understanding the nature of the solar atmosphere. Transition region loops are relatively dynamic and their physical properties have not yet been fully understood. With spectral data of the line pair of O IV 1399.8 Å and 1401.2 Å (
Geostratigraphic Mapping of the Intrusive Valentine Domes on the Moon
Rossi, Angelo Pio; Suárez-Valencia, Javier Eduardo
Lunar intrusive igneous domes have not been the center of much research in the past due to their rare occurrence on the lunar surface, and the difficulty in locating them. Most of the known structures were discovered using images with low illumination angles, including data from the Lunar Orbiter, telescopic images, and photos taken during the Apo…
The Variable Stars Population of the Extended Young Globular Cluster NGC 1851
Arellano Ferro, A.; Prudil, Z.; Yepez, M. A. +3 more
We report <i<>VI CCD photometry of the globular cluster NGC 1851. We aim to study the membership of the variable stars detected in the field of the cluster as listed in the Catalogue of Variable stars in Globular Clusters (CVSGC; Clement et al. 2001) and reported by the Gaia mission. We cross match the two sets of variables to produce lig…
Aperture and Resolution Effects on Ultraviolet Star-forming Properties: Insights from Local Galaxies and Implications for High-redshift Observations
Leitherer, Claus; Berg, Danielle A.; Arellano-Córdova, Karla Z. +2 more
We present an analysis of the effects of spectral resolution and aperture scale on derived galaxy properties using far-ultraviolet (FUV) spectra of local star-forming galaxies from the International Ultraviolet Explorer (R ∼ 250, field of view (FOV) ∼ 10″ × 20″) and Cosmic Origins Spectrograph on the Hubble Space Telescope (R ∼ 15,000, FOV ∼ 2.″5)…
The challenge of identifying INTEGRAL sources on the Galactic plane
Ubertini, Pietro; Bazzano, Angela; Fiocchi, Mariateresa +6 more
The International Gamma-ray Astrophysics Laboratory (INTEGRAL) has been surveying the sky above 20 keV since its launch in 2002 providing new insights into the nature of the sources that populate our Universe at soft γ-ray energies. The latest IBIS/ISGRI survey lists 929 hard X-ray sources, of which 113 are reported as unidentified, i.e. lacking a…
Localized ejection of dust and chunks on comet 67P/Churyumov-Gerasimenko: testing how comets work
Blum, J.; Gundlach, B.; Attree, N. +2 more
We extend an existing thermophysical activity model of comet 67P/Churyumov-Gerasimenko to include pressure build-up inside the pebbles making up the nucleus. We test various quantities of H
Dynamical Evolution of Four Old Galactic Open Clusters Traced by Their Constituent Stars with Gaia DR3
Vaidya, Kaushar; Rao, Khushboo K.; Agarwal, Manan +2 more
We investigate the evolutionary stages of four open clusters—Berkeley 39, Collinder 261, NGC 6819, and NGC 7789—of ages ranging from 1.6 to 6 Gyr. These clusters have previously been classified into dynamically young and intermediate age groups based on the segregation level of BSS with respect to red-giant-branch stars and main-sequence stars, re…
Investigating scaling relations in X-ray reverberating AGN using symbolic regression
Chainakun, P.; Young, A. J.; Thongkonsing, P. +1 more
Symbolic regression (SR) is a regression analysis based on genetic algorithms to search for mathematical expressions that best fit a given data set, by allowing the expressions themselves to mutate. We use the SR to analyse the parameter relations of the X-ray reverberating active galactic nuclei where the soft Fe-L lags were observed by the X-ray…
4U 1210-64: a new member of the rare intermediate-mass X-ray binary subclass
Montesinos, B.; McBride, V. A.; Pottschmidt, K. +5 more
4U 1210-64 is a peculiar X-ray binary that was first discovered in 1978 by the Uhuru satellite. The analysis of the X-ray data revealed a 6.7-d orbital period and an additional long-term modulation that is manifested as low- and high-flux states. Based on the previous classification of the donor star from the analysis of its optical spectra, the s…