High-resolution spectroscopy of the symbiotic star AX Per
ATel #17658; K. Stoyanov, V. Marchev, M. Moyseev (Institute of Astronomy and National Astronomical Observatory, Bulgaria), D. Marchev (Konstantin Preslavsky University of Shumen)
on 9 Feb 2026; 13:33 UT
Credential Certification: Kiril Stoyanov (kstoyanov@astro.bas.bg)
Subjects: Optical, Binary, Star, Variables
Referred to by ATel #: 17725
We obtained a high-resolution spectrum of the symbiotic star AX Per on 2026 Feb 07 (JD 2461079.33971112) following the outburst reported in the ATel#17630. The spectrum was obtained using the ESPERO spectrograph (Bonev et al. 2017, BlgAJ, 26, 67) mounted on the 2m RCC telescope at Rozhen NAO, Bulgaria.
We measured the equivalent widths on selected emission lines, visible in the spectrum, and compared them with the EWs measured on a spectrum of AX Per from 2018 Sep 02.
| Spectral line |
20180902 |
20260207 |
| Hα |
-102 Å |
-125 Å |
| Hβ |
-57 Å |
-66 Å |
| He I 6678 |
-6 Å |
-13 Å |
| He I 4471 |
-22 Å |
not visible |
| He II 4686 |
-139 Å |
-146 Å |
| [O III] 5007 |
-14 Å |
-54 Å |
| [Fe VII] 5721 |
-13 Å |
-1 Å |
| [Fe VII] 6086 |
-17 Å |
-2 Å |
Our observations confirm the drop in the high ionisation [Fe VII] lines (ATel#
17630).
The authors acknowledge the support of grant KP-06-H98/8 from the Bulgarian National Science Fund.
