The hidden symbiotic star SU Lyn -- detection of flickering in U band
R. K. Zamanov, A. Kostov, M. Moyseev, N. Petrov, Y. M. Nikolov, G. Y., Latev, D. Marchev, S. Boeva, K. A. Stoyanov, M. S. Minev, J. Marti, V., Radeva, E. Sanchez-Ayaso, M. F. Bode, K. Ilkiewicz, G. Nikolov, P. L., Luque-Escamilla, B. Spassov, B. Borisov, V. D. Marchev
TL;DR
This study reports the detection of faint flickering in the U band of the hidden symbiotic star SU Lyn, indicating a low accretion rate onto its white dwarf secondary, with no significant variability in other bands or related objects.
Contribution
First detection of flickering in the U band of SU Lyn, providing new insights into its accretion activity and secondary component nature.
Findings
Flickering detected in U band with 0.05 mag amplitude.
No variability found in B, V, g', r' bands.
No significant variability in related objects.
Abstract
We report photometric observations of the hidden symbiotic star SU Lyn in the optical bands. In five nights we detect a weak flickering in U band with amplitude of about 0.05 magnitudes. No intranight variations are found in B, V, g' and r' bands. This is one more indication that the secondary component is a white dwarf accreting at low accretion rate. We also searched for intranight variability of a dozen related object (RR Boo, RT Boo, AM Cyg, AG Peg, BF Cyg, NQ Gem, StHa190, V627 Cas, XX Oph, FS Cet and Y Gem) in which no variability above the observational errors is detected.
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Taxonomy
TopicsAstrophysics and Star Formation Studies · Stellar, planetary, and galactic studies · Astronomical Observations and Instrumentation