A Spectroscopic and Photometric Study of MWC 342 and Its B[e] Phenomenon over the Last 40 Years
Abstract
1. Introduction
2. Observations
Observatory | Dates | Telescope/Spectrograph/Location | R | Range (Å) | # sp. | Ref |
---|---|---|---|---|---|---|
Mauna Kea | 2004–2022 | 3.6 m, CFHT, ESPaDoNs, Hawaii | 65,000 | 3800–10,500 | 10 | [16] |
OAN SPM | 2005–2019 | 2 m, REOSC, Baja California, Mexico | 18,000 | 3700–7300 | 14 | [17] |
McD | 2005–2012 | 2.7 m, Texas, USA | 60,000 | 3700–10,500 | 2 | [18] |
Pic du Midi | 2007 | 2 m, NARVAL, France | 65,000 | 3700–10,500 | 1 | [19] |
Indian Astron. Obs. | 2018–2019 | 2 m, HCT, Hanle, India | 25,000 | 4200–10,500 | 4 | [20] |
ORLM | 2010–2021 | 1.2 m, HERMES, La Palma, Spain | 85,000 | 3800–9,000 | 30 | [21] |
Apache Point | 2021–2023 | 3.5 m, ARCES, New Mexico, USA | 31,500 | 3600–10,500 | 2 | [22] |
TCO | 2023 | 0.81 m, Eshel, North Carolina, USA | 12,000 | 3800–7800 | 2 | [23] |
Observatory | Dates | Telescope/Location | Filters | # | Ref |
---|---|---|---|---|---|
Majdanak | 1984–1999 | 0.6 m, Uzbekistan | 774 | [15] | |
Assy-Turgen | 1986–1994 | 1.0 m, Kazakhstan | 46 | [7,9] | |
TShAO | 1995–1999 | 1.0 m, Kazakhstan | 16 | [9] | |
INTEGRAL | 2002–2008 | , space | V | 28 | [24] |
Abastumani | 1989–1993 | 1.25 m, Georgia | 48 | [25] | |
APAS DR10 | 2011 | multiple telescopes | 2 | [26] | |
ASAS-SN | 2015–2024 | multiple telescopes | 1178 | [27,28] |
3. Results and Discussion
3.1. Variability
3.2. Extinction, Distance, and Luminosity
3.3. Spectral Features
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
Abbreviations
References
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Akniyazova, A.Z.; Miroshnichenko, A.S.; Zharikov, S.V.; Van Winckel, H.; Manset, N.; Raj, A.; Chojnowski, S.D.; Khokhlov, S.A.; Reva, I.V.; Kokumbaeva, R.I.; et al. A Spectroscopic and Photometric Study of MWC 342 and Its B[e] Phenomenon over the Last 40 Years. Galaxies 2025, 13, 63. https://doi.org/10.3390/galaxies13030063
Akniyazova AZ, Miroshnichenko AS, Zharikov SV, Van Winckel H, Manset N, Raj A, Chojnowski SD, Khokhlov SA, Reva IV, Kokumbaeva RI, et al. A Spectroscopic and Photometric Study of MWC 342 and Its B[e] Phenomenon over the Last 40 Years. Galaxies. 2025; 13(3):63. https://doi.org/10.3390/galaxies13030063
Chicago/Turabian StyleAkniyazova, Aigerim Zh., Anatoly S. Miroshnichenko, Sergey V. Zharikov, Hans Van Winckel, Nadine Manset, Ashish Raj, Stephen Drew Chojnowski, Serik A. Khokhlov, Inna V. Reva, Raushan I. Kokumbaeva, and et al. 2025. "A Spectroscopic and Photometric Study of MWC 342 and Its B[e] Phenomenon over the Last 40 Years" Galaxies 13, no. 3: 63. https://doi.org/10.3390/galaxies13030063
APA StyleAkniyazova, A. Z., Miroshnichenko, A. S., Zharikov, S. V., Van Winckel, H., Manset, N., Raj, A., Chojnowski, S. D., Khokhlov, S. A., Reva, I. V., Kokumbaeva, R. I., Omarov, C. T., Grankin, K. N., Agishev, A. T., & Vaidman, N. L. (2025). A Spectroscopic and Photometric Study of MWC 342 and Its B[e] Phenomenon over the Last 40 Years. Galaxies, 13(3), 63. https://doi.org/10.3390/galaxies13030063