V2676 Oph: Estimating Physical Parameters of a Moderately Fast Nova

• Autorzy: Raj A. , Pavana M. , Kamath U. S. , Anupama G. C. , Walter M. F.

Identyfikatory

DOI

10.32023/0001-5237/68.1.4

• Języki publikacji: EN

Abstrakty

EN

Using our previously reported observations, we derive some physical parameters of the moderately fast nova V2676 Oph 2012 #1. The best-fit Cloudy model of the nebular spectrum obtained on 2015 May 8 shows a hot white dwarf source with T_BB≈1.0×10⁵ K having a luminosity of 1.0×10³⁸ erg/s. Our abundance analysis shows that the ejecta are significantly enhanced relative to solar, He/H=2.14, O/H=2.37, S/H=6.62 and Ar/H=3.25. The ejecta mass is estimated to be 1.42×10^-5 M⊙. The nova showed a pronounced dust formation phase after 90 d from discovery. The J-H and H-K colors were very large as compared to other molecule- and dust-forming novae in recent years. The dust temperature and mass at two epochs have been estimated from spectral energy distribution fits to infrared photometry.

Słowa kluczowe

EN

line: identification; novae; cataclysmic variables; stars: individual: V2676 Oph; techniques: spectroscopic

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2018
• Tom: Vol. 68, No. 1
• Strony: 79--88
• Opis fizyczny: Bibliogr. 26 poz., tab., wykr.

Twórcy

autor

Raj A.

• Indian Institute of Astrophysics, II Block Koramangala, Bangalore 560034, India

autor

Pavana M.

• Indian Institute of Astrophysics, II Block Koramangala, Bangalore 560034, India

autor

Kamath U. S.

• Indian Institute of Astrophysics, II Block Koramangala, Bangalore 560034, India

autor

Anupama G. C.

• Indian Institute of Astrophysics, II Block Koramangala, Bangalore 560034, India

autor

Walter M. F.

• epartment of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA

Bibliografia

• Anupama, G.C., et al. 2013, A&A, 559, 121.
• Das, R.K., Banerjee, D.P.K., and Ashok, N.M. 2009, MNRAS, 398, 375.
• Das, R., and Mondal, A. 2015, New Astronomy, 39, 19.
• Denissenkov, P.A., Truran, J.W., Pignatari, M., Trappitsch, R., Ritter, C., Herwig, F., Battino, U., Setoodehnia, K., and Paxton, B. 2014, MNRAS, 442, 2058.
• Ferland, G.J., Porter, R. L., van Hoof, P.A.M., Williams, R.J.R., Abel, N.P., Lykins, M.L., Shaw, G., Henney, W.J., and Stancil, P.C. 2013, Revista Mexicana de Astronomía y Astrofísica, 49, 137.
• Finzell, T., et al. 2018, ApJ, 852, 108.
• Helton, L.A., et al. 2010, AJ, 140, 1347.
• Jose, J., and Hernanz, M. 1998, ApJ, 494, 680.
• Jose, J., Hernanz, M., and Iliadis, C. 2006, Nuclear Physics A, 777, 550.
• Jose, J., and Hernanz, M. 2007, Meteoritics & Planetary Science, 42, 1135.
• Kawakita, H., Ootsubo, T., Arai, A., Shinnaka, Y., and Nagashima, M. 2017, AJ, 153, 74.
• Mondal, A., Anupama, G.C., Kamath, U.S., Das, R., Selvakumar, G., and Mondal, S. 2018, MNRAS, 474, 4211.
• Nishimura, H., Kaneda, H., Kojima, T., and Yusa, T. 2012, CBET, 3072.
• Raj, A., Ashok, N.M., Banerjee, D.P.K., Munari, U., Valisa, P., and Dallaporta, S. 2012, MNRAS, 425, 2576.
• Raj, A., et al. 2015a, AJ, 149, 136.
• Raj, A., Banerjee, D.P.K., Ashok, N.M., and Kim, S.C. 2015b, Research in Astronomy and Astrophysics, 15, 993.
• Raj, A., Das, R.K., and Walter, F.M. 2017, ApJ, 835, 274.
• Schwarz, G.J. 2002, ApJ, 577, 940.
• Schwarz, G.J., Shore, S.N., Starrfield, S., Hauschildt, P.H., Della Valle, M., and Baron, E. 2001, MNRAS, 320, 103.
• Schwarz, G.J., Shore, S.N., Starrfield, S., and Vanlandingham, K.M. 2007a, ApJ, 657, 453.
• Schwarz, G.J., et al. 2007b, AJ, 134, 516.
• Vanlandingham, K.M., Schwarz, G.J., Shore, S.N., Starrfield, S., and Wagner, R.M. 2005, ApJ, 624, 914.
• Williams, R.E. 1994, ApJ, 426, 279.
• Williams, R. 2012, AJ, 144, 98.
• Williams, S.C., Darnley, M.J., and Henze M. 2017, MNRAS, 472, 1300.
• Woodward, C.E., Lawrence, G.F., Gehrz, R.D., Jones, T.J., Kobulnicky, H.A., Cole, J., Hodge, T., and Thronson, H.A., Jr. 1993, ApJ, 408, L37.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).