10 citations · 44 across the 7 of their papers we have counts for
7 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…
Photometric and Spectroscopic Study of the Supergiant with an Infrared Excess V1027 Cygni
V. P. Arkhipova, O. G. Taranova, N. P. Ikonnikova +4
We present the results of our and -photometry for the semiregular pulsating variable V1027~Cyg, a supergiant with an infrared excess, over the period from 1991 to 2015…
A family of cometary globules at the periphery of Cyg OB1: the star HBHA 3703-01 and the reflection nebula GM 2-39
V. P. Arkhipova, O. V. Egorov, V. F. Esipov +7
The interstellar medium in the region of a family of cometary globules including the reflection nebula GM 2-39 has been analyzed basing on our observations with the slit spectrogra…
Variability of Hot Post-AGB Star IRAS 19336-0400 in the Early Phase of its Planetary Nebula Ionization
V. P. Arkhipova, M. A. Burlak, V. F. Esipov +2
We present photoelectric and spectral observations of a hot candidate proto-planetary nebula - early B-type supergiant with emission lines in spectrum - IRAS 19336-0400. The light…
Variability of Hot Supergiant IRAS 19336-0400 in the Early Phase of its Planetary Nebula Ionization
V. P. Arkhipova, M. A. Burlak, V. F. Esipov +2
We present photoelectric and spectral observations of a hot candidate proto-planetary nebula - early B-type supergiant with emission lines in spectrum - IRAS 19336-0400. The light…