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Orbits of Visual Double Stars from P. Couteau's Catalogue Determined with Gaia DR2 and Gaia EDR3 Data
Kisser, A. E.; Krechet, V. G.
The orbits of ten stars discovered by P. Couteau have been determined for the first time: COU 99, 357, 610, 850, 1346, 1531, 1642, 1752, 1845, and 2459. For two of them (COU 850 and 1752) an arc of more than half a revolution is covered by observations; the orbits of the remaining stars have been determined from short arcs ($5^{\circ}{-}50^{\circ}…
Photometric Determination of the Distance to the RR Lyrae Star YZ Capricorni
Lester, J.; Joignant, R.; Meier, M.
The RR Lyrae YZ Cap was observed using photometric methods to determine its pulsation period and distance. Light curves in the Bessell B and V and SDSS i' and z' filters were used to determine the period, which was found to be 0.274 ± 0.003 day. The distances calculated using a luminosity-metallicity (V filter) and period-luminosity-metallicity re…
Chronos - take the pulse of our galactic neighbourhood
Famaey, Benoit; Katz, David; Haywood, Misha +15 more
Understanding our Galaxy's structure, formation, and evolution will, over the next decades, continue to benefit from the wonderful large survey by Gaia, for astrometric, kinematic, and spectroscopic characterization, and by large spectroscopic surveys for chemical characterization. The weak link for full exploitation of these data is age character…
Investigating the Physical Properties and Fragmentation of the AFGL 333-Ridge
Wang, Jun-Jie; Xu, Jin-Long; Liang, Xiaolian
We present multiwavelength data to investigate the physical properties and fragmentation of AFGL 333-Ridge. A statistical analysis of velocity dispersion indicates that turbulence is the dominant motion in the ridge. However, the linear mass density (1124.0 M ⊙/pc) of AFGL 333-Ridge far exceeds its critical value of 406.5 M ⊙…
Fine structure of the main sequence of NGC 2516 scrutinized with Gaia andASteCA
Perren, G. I.; Pera, M. S.; Navone, H. D. +3 more
The fine structure of the open cluster NGC 2516 is investigated. This is an extended and relatively young open cluster subtending over two degrees in the sky, situated at just a few hundred PARSECs (< 400 pc) from the Sun. We collected Gaia DR2 data (G magnitude down to G=19, BP-RP color index, proper motions, and parallaxes) for more than 400,…
The Milky Way Project: Probing Star Formation with First Results on Yellowballs from DR2
Wolf-Chase, Grace; Kerton, C. R.; Devine, Kathryn +7 more
Yellowballs (YBs) were first discovered during the Milky Way Project (MWP) citizen science initiative. The MWP users noticed compact, yellow regions in Spitzer Space Telescope mid-infrared (MIR) images of the Milky Way plane and asked professional astronomers to explain these "yellow balls." Follow-up work by Kerton et al. determined that YBs like…
The RISOTTO radiative transfer and retrieval pipeline for the analysis of occultation spectra
Montmessin, F.; Ferron, S.; Braude, A. S.
We present a new radiative transfer and retrieval pipeline, referred to as RISOTTO, designed for observations made in occultation geometry. RISOTTO can retrieve accurate vertical profiles of the constituents of a planetary atmosphere using a Bayesian approach while simultaneously correcting for instrumental artefacts and uncertainties. The algorit…
The Solar Orbiter Radio and Plasma Waves (RPW) instrument (Corrigendum)
Hellinger, P.; André, M.; Maksimovic, M. +103 more
Asymmetric Distribution of the Solar Photospheric Magnetic-Field Values
Gao, Peng-Xin; Li, Ke-Jun; Xu, Jing-Chen
Understanding the characteristics of the solar magnetic field is essential for interpreting solar activities and dynamo. In this research, we investigated the asymmetric distribution of the solar photospheric magnetic-field values, using synoptic charts constructed from space-borne high-resolution magnetograms. It is demonstrated that the Lorentzi…
Long-term V (RI)c CCD photometry of pre-main-sequence stars in the association Cepheus OB3
Ibryamov, Sunay; Semkov, Evgeni; Peneva, Stoyanka +1 more
Results from optical CCD photometric observations of 13 pre-main-sequence stars collected during the period from February 2007 to November 2020 are presented. These stars are located in the association Cepheus OB3, in the field of the young star V733 Cephei. Photometric observations, especially concerning the long-term variability of the stars, ar…