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Journals / Turkish Journal of Astronomy and Astrophysics / 2026 / Cilt: 6 Sayı: Special Issue: UAK2024 Proc. Özel Sayı

Photoionization Analysis and Abundance Determination of Classical Nova V6567 Sgr

Klasik Nova V6567 Sgr’un Fotoiyonizasyon Analizi ve Bolluk Tayini

Hasan H. Esenoğlu(İstanbul Üniveristesi)0000-0003-3531-7510
Gamal M. Hamed(National Research Institute of Astronomy and Geophysics)0000-0001-6009-1897
Pages
159–166
Publication Date
2025-07-01
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The findings from three different novae were compared at distinct stages: day 13 (pre-cloud phase), day 265 (cloud phase), and day 515 (late cloud phase) after maximum brightness.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this study, we present the results of a photoionization analysis and abundance determination of the optical spectrum of the classical nova V6567 Sgr, using the Cloudy code.
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Key Findings & Data:This nova was discovered on June 1, 2020, and reached peak brightness on June 17, 2020.
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Conclusion & Impact:The findings from three different novae were compared at distinct stages: day 13 (pre-cloud phase), day 265 (cloud phase), and day 515 (late cloud phase) after maximum brightness.
🔬Design:Modeling & Simulation
📍Scope:2020 Verileri
⚙️Variables:nova · cataclysmic variable · V6567 Sgr

Abstract

In this study, we present the results of a photoionization analysis and abundance determination of the optical spectrum of the classical nova V6567 Sgr, using the Cloudy code. This nova was discovered on June 1, 2020, and reached peak brightness on June 17, 2020. The spectrum was obtained on June 30, 2020, with the TUG-RTT150 telescope. When classical novae are observed in the nebular phase, this modeling approach offers insights into abundance analysis, the characteristics of the underlying white dwarf, the outburst mechanism, and the physical conditions of the system prior to the explosion. Thirteen days after V6567 Sgr reached its maximum brightness, its shell was modeled in this way, and the model outputs were compared with observational data. Using the Cloudy code in this model, we solved the thermal and statistical equilibrium equations for the nova shell, calculating the electron temperature, number density, emission spectrum, and ionization levels. The discrepancies between the modeled and observed spectra for V6567 Sgr, along with certain spectral features, suggest that the nova has not yet entered the nebular phase. The results of the photoionization analysis and abundance determination indicate that V6567 Sgr is not in the nebular phase. This suggests that the nebular phase of the nova likely occurred sometime after the 13th day following the outburst. The findings from three different novae were compared at distinct stages: day 13 (pre-cloud phase), day 265 (cloud phase), and day 515 (late cloud phase) after maximum brightness.

Özet

Bu araştırma, 2020-06-01 tarihinde keşfedildiği ve 2020-06-17 tarihinde patlama olayının en büyük parlaklığa ulaştığı klasik nova V6567 Sgr'un 2020-06-30’da TUG-RTT150 teleskopundan alınan optik tayfının Cloudy kodu kullanılarak fotoinizasyon analizi ve bolluk tayini sonuçlarını sunuyoruz. Klasik novalar eğer bulutsu evrede bulunursa bu model, bolluk analizi, içteki beyaz cüce, patlamanın mekanizması ve patlamadan önceki sistemin fiziksel koşulları hakkında bilgi verir. Maksimum parlaklığından sonraki 13. gününde V6567 Sgr'un kabuğu bu şekilde modellenmiştir ve çıktıları gözlemle karşılaştırılmıştır. Modelde kullanılan Cloudy kodu ile, bu nova kabuğunun termal ve istatistiksel denge denklemleri çözülmüş ve bu yolla elektron sıcaklığı ve sayı yoğunluğu ile salma tayfı ve iyonlaşma hesaplanmıştır. V6567 Sgr için uygulanan model ve gözlem tayflarının uyuşmaması ve gözlenen tayfsal özellikler nedeniyle novanın bulutsu evreye henüz girmediği görülmüştür. Fotoiyonizasyon analizinin ve bolluk tayininin sonuçları bulutsu evreye ait olmadığı yönündedir. Bu durumda, novanın bulutsu evresi, patlamanın 13. günden sonraki zamanlarda gerçekleşmiş olmalıdır. Maksimum ışıktan 13. (bulut öncesi evre), 265. (bulut evresi) ve 515. (geç bulut evresi) günlerde üç farklı novanın tüm bulguları da karşılaştırılmıştır.

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Cite This Article

Esenoğlu, H. H., Hamed, G. M. (2025). Photoionization Analysis and Abundance Determination of Classical Nova V6567 Sgr. Turkish Journal of Astronomy and Astrophysics, Cilt: 6 Sayı: Special Issue: UAK2024 Proc. Özel Sayı, 159–166. https://doi.org/10.55064/tjaa.1592027

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References (44)

  1. Andreä, J., Drechsel, H., Starrfield, S., AA 191 (1994) 869–889
  2. Astropy Collaboration, AA 558 (2013) A33
  3. Astropy Collaboration, AA 156 (2018) 123–132
  4. Austin, S.J., Wagner, R.M., Starrfield, S., Shore, S.N., Sonneborn, G., Bertram, R., AJ 111 (1996) 869–898
  5. Balman, S., Yilmaz, A., Retter, A., Saygac, T., Esenoglu, H., MNRAS 356 (2005) 773–777
  6. Banerjee, D.P.K and Ashok, N.M., BASI 40 (2012) 243–265
  7. Banerjee, D.P.K., Woodward, C.E., Evans, A., Bus, S.J., Starrfield, S., Wagner, R.M., ATel 13888 (2020)
  8. Cayrel, R. The Impact of Very High S/N Spectroscopy on Stellar Physics (Eds. G. Cayrel de Strobel, M. Spite), IAUS 132 (1988) 345–353
  9. Craig, M. et al. Astropy/ccdproc: v1.3.0.post1 (2017)
  10. De, K., Hankins, M.J., Kasliwal, M.M., Moore, A.M., Ofek, E.O., Adams, S.M., Ashley, M.C.B., Babul, A.N., Bagdasaryan, A., Burdge, K.B., Burnham, J., Dekany, R.G., Declacroix, A., Galla, A., Greffe, T., Hale, D., Jencson, J.E., Lau, R.M., Mahabal, A., McKenna, D., Sharma, M., Shopbell, P.L., Smith, R.M., Soon, J., Sokoloski, J., Soria, R., Travouillon, T., PASP 132 (2020a) 025001
  11. De, K., Hankins, M., Kasliwal, M.M., Sokoloski, J., Ashley, M., Babul, A., Karambelkar, V., Lau, R.M., Moore, A., Ofek, E.O.,
  12. Sharma, M., Soon, J., Soria, R., Travouillon, T., ATel 13790 (2020b)
  13. Della Valle, M., Bianchini, A., Livio, M., Orio, M., AA 266 (1992) 232–236
  14. Ferland, G.J., Chatzikos, M., Guzmán, F., Lykins, M.L., van Hoof, P.A. M., Williams, R.J.R., Abel, N.P., Badnell, N.R., Keenan, F.P., Porter, R.L., Stancil, P.C., RMxAA 53 (2017) 385–438
  15. Fitzpatrick, E.L., Massa, D., Gordon, K.D., Bohlin, R., Clayton, G.C., AJ 886 (2019) 108–132
  16. González-Riestra, R., Krautter, J., Ultraviolet Astrophysics Beyond the IUE Final Archive (Eds. W. Wamsteker, R. González Riestra, B. Harris) ESA Special Publication 413 (1998)
  17. Hamed, G.M., Esenoglu, H.H., TJAA 4 (2023) 397–400
  18. Hamed G.M., Esenoglu, H.H, Galeev, A.I., New Astronomy 113 (2024) 102273
  19. Iijima, T., Esenoglu, H.H., AA 404 (2003) 997–1009 José, J. Stellar Explosions: Hydrodynamics and Nucleosynthesis, (2016) ISBN: 978-1-4398-5306-1
  20. Joshi, V., Banerjee, D.P.K., Srivastava, M., ApJ 851 (2017) L30
  21. Kalberla, P.M.W., Burton, W.B., Hartmann, D., Arnal, E.M., Bajaja, E., Morras, R., Pöppel, W.G.L., AA 440 (2005) 775–782
  22. Khamitov, I.M., Bikmaev, I.F., Burenin, R.A., Glushkov, M.V., Melnikov, S.S., Lyapin, A.R., Astron Lett 46 (2020) 1–11
  23. Kramida, A., Ralchenko, Y., Reader, J., NIST ASD Team NIST atomic spectra database (ver. 5.8) (2020) https://physics.nist.gov/asd
  24. Lenz, D.D., Ayres, T.R., PASP 104 (1992) 1104–1106
  25. Luridiana, V., Morisset, C., Shaw, R.A., AA 573 (2015) A42
  26. Masci, F.J., Laher, R.R., Rusholme, B., Shupe, D.L., Groom, S., Surace, J., Jackson, E., Monkewitz, S., Beck, R., Flynn, D., Terek, S., Landry, W., Hacopians, E., Desai, V., Howell, J., Brooke, T., Imel, D., Wachter, S., Ye, Q.Z., Lin, H.W., Cenko, S.B., Cunningham, V., Rebbapragada, U., Bue, B., Miller, A.A., Mahabal, A., Bellm, E.C., Patterson, M.T., Jurić, M., Golkhou, V.Z., Ofek, E.O., Walters, R., Graham, M., Kasliwal, M.M., Dekany, R.G., Kupfer, T., Burdge, K., Cannella, C.B., Barlow, T., Van Sistine, A., Giomi, M., Fremling, C., Blagorodnova, N., Levitan, D., Riddle, R., Smith, R.M., Helou, G., Prince, T.A., Kulkarni, S.R., PASP 131 (2020) 018003
  27. McCully, C., Crawford, S., Kovacs, G., Tollerud, E., Betts, E., Bradley, L., Craig, M., Turner, J., Streicher, O., Sipocz, B., Robitaille, T., Deil, C., Astropy/astroscrappy: v1.0.5 zenodo release (2018) https://zenodo.org/records/1482019
  28. Munari, U., Ochner, P., Vagnozzi, A., Moretti, S., Valisa, P., Maitan, A., Dallaporta, S., ATel 13807 (2020)
  29. Oke, J.B., AJ 99 (1990) 1621–1631
  30. Sokolovsky, K., Korotkiy, S., Lebedev, A., Stella Novae: Past and Future Decades (Eds. P.A.Woudt and V.A.R.M. Ribeiro) ASPC 197 (2014) 395–400
  31. Rayner, J.T., Toomey, D.W., Onaka, P.M., Denault, A.J.,
  32. Stahlberger, W.E., Vacca, W.D., Cushing, M.C., Wang, S., PASP 115 (2003) 362–382
  33. Saizar, P., Starrfield, S., Ferland, G.J., Wagner, R.M., Truran, J.W., Kenyon, S.J., Sparks, W.M., Williams, R.E., Stryker, L.L., ApJ 367 (1991) 310–320
  34. Shappee, B.J., Prieto, J.L., Grupe, D., Kochanek, C.S., Stanek, K.Z., De Rosa, G., Mathur, S., Zu, Y., Peterson, B.M., Pogge, R.W., Komossa, S., Im, M., Jencson, J., Holoien, T.W.S., Basu, U., Beacom, J.F., Szczygieł, D.M., Brimacombe, J., Adams, S., Campillay, A., Choi, C., Contreras, C., Dietrich, M., Dubberley, M., Elphick, M., Foale, S., Giustini, M., Gonzalez, C., Hawkins, E., Howell, D.A., Hsiao, E.Y., Koss, M., Leighly, K.M., Morrell, N., Mudd, D., Mullins, D., Nugent, J.M., Parrent, J., Phillips, M.M., Pojmanski, G., Rosing, W., Ross, R., Sand, D., Terndrup, D.M., Valenti, S., Walker, Z., Yoon, Y., ApJ 788 (2014) 48–61
  35. Sokolovsky K.V., Aydi E., Chomiuk, L., Kawash, A., Strader, J., Mukai, K., Hambsch, F.J., Vanmunster, T., Korotkiy, S., Beloushkin, A., ATel 13804 (2020)
  36. Stickland, D.J., Penn, C.J., Seaton, M.J., Snijders, M.A.J., Storey, P.J., MNRAS 197 (1981) 107003
  37. van den Bergh, S., Younger, P.F., AASuppl 70 (1987) 125–140
  38. Tody, D. Astronomical Data Analysis Software and Systems II (Eds. R.J. Hanisch, R.J.V. Brissenden, J. Barnes), AASuppl 52 (1993) 173–183
  39. van Dokkum, P.G., PASP 113 (2001) 1420–1427
  40. Yaron, O., Prialnik, D., Shara, M.M., Kovetz, A., ApJ 623 (2005) 398–410
  41. Warner B., Cataclysmic Variable Stars
  42. Woodward, C.E., Banerjee, D.P.K., Evans, A., Starrfield, S., Wagner, R.M., ATel 13801 (2020a)
  43. Woodward, C.E., Banerjee, D.P.K., Evans, A., Starrfield, S., Wagner, R.M., ATel 13852 (2020b)
  44. Woodward, C.E., Banerjee, D.P.K., Evans, A., ATel 14034 (2020c)