| Issue |
A&A
Volume 675, July 2023
|
|
|---|---|---|
| Article Number | A79 | |
| Number of page(s) | 4 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361/202346451 | |
| Published online | 04 July 2023 | |
The star in RNO 54: A possible post-FUor with a short faint jet
1
Byurakan Astrophysical Observatory,
0213
Aragatsotn prov., Armenia
e-mail: tigmag@sci.am
2
Special Astrophysical Observatory,
N.Arhyz,
Karachaevo-Cherkesia
369167, Russia
e-mail: moisav@sao.ru
Received:
18
March
2023
Accepted:
22
May
2023
Aims. The aim of the present study is to analyze the spectra of an unusual pre-main sequence star in the cometary nebula RNO 54, which is suspected by several researchers to be a FUori-like object.
Methods. We performed long-slit spectroscopy of the star using the 6m telescope with the SCORPIO-2 multi-mode focal reducer.
Results. We discover a short (~4″ or ~6000 AU) and faint emission shock-excited jet from this star, probably oriented toward the long axis of the nebular ellipse. The spectral type of the star is estimated as G0-2 II; we confirm the split of the Li I absorption line, which is a typical sign indicating a FUori-like spectrum. Our analysis of the available data reveals an almost null photometric variability over at least the last 20 years. The lower limit of the bolometric luminosity of the star is estimated as 300 L⊙. Our study supports the classification of RNO 54 as a FUor-like star in the long post-outburst stage.
Key words: stars: pre-main sequence / stars: jets / stars: individual: RNO 54
© The Authors 2023
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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