7 citations · 7 across the 1 of their papers we have counts for
3 papers
Spectroscopic Variability of the Compact Planetary Nebula Hb 12
N. P. Ikonnikova, I. A. Shaposhnikov, V. F. Esipov +5
We present the results of our new low-resolution spectroscopic observations of the young compact planetary nebula Hb 12 performed in 2011-2020 with SAI MSU telescopes. We have meas…
Surprising Variability of the Planetary Nebula IC 4997 = QV Sge
V. P. Arkhipova, M. A. Burlak, N. P. Ikonnikova +3
We present the results of a new epoch of a long-term photometric monitoring of the variable planetary nebula IC~4997. The integral light curves display a continuing brighteni…
Multicolor photometry and spectroscopy of the yellow supergiant with dust envelope HD 179821=V1427 Aquilae
N. P. Ikonnikova, O. G. Taranova, V. P. Arkhipova +5
We present the results of multicolor (UBVJHKLM) photometry (2009-2017) and low-resolution spectroscopy (2016-2017) of the semi-regular variable V1427 Aql=HD 179821, a yellow superg…