Consistent System of Oscillator Strengths of A²Δ-X²Π (0,0) and B²Σ^--X²Π (0,0) Bands of CH Molecule

• Autorzy: Weselak T. , Galazutdinov G. A. , Gnaciński P. , Krełowski J.
• Języki publikacji: EN

Abstrakty

EN

Detailed analysis of intensity ratios of unsaturated methylidyne (CH) A-X and B-X bands suggests consistency of the recently published oscillator strengths of A²Δ-X²Π (0,0) - 4300 Å and B²Σ^- - X²Π (0,0) - (3878 Å, 3886 Å and 3890 Å) bands (i.e. 506, 107, 320 and 213×10^-5 respectively). This result is based on extremely high S/N ratio spectra of 45 stars, acquired with three high-resolution spectrographs, situated in Chile: ESO La Silla (HARPS), ESO Paranal (UVES) and Las Campanas (MIKE) and MAESTRO instrument situated in Northern Caucasus (Russia). The calculated methylidyne column densities, obtained using the consistent system of the oscillator strengths toward the observed targets, are given as well. We verify oscillator strengths of the CH+ A-X (0,0) and (0,1) bands at 4232 Å and 3957 Å equal to 545 and 342×10^-5 respectively. We also confirm the lack of correlation between abundances of neutral CH and CH⁺ which demonstrates that they are originated in different environments.

Słowa kluczowe

EN

ISM: molecules

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2014
• Tom: Vol. 64, No. 3
• Strony: 277--292
• Opis fizyczny: Bibliogr. 40 poz., tab., wykr.

Twórcy

autor

Weselak T.

• Institute of Physics, Kazimierz Wielki University, Weyssenhoffa 11, 85-072 Bydgoszcz, Poland

autor

Galazutdinov G. A.

• Astronomia, Universidad Catolica del Norte, Av. Angamos 0610, Antofagasta, Chile
• Pulkovo Observatory, Pulkovskoe Shosse 65, Saint-Petersburg 196140, Russia

autor

Gnaciński P.

• University of Gdańsk, ul. Wita Stwosza 57, 80-952 Gdańsk, Poland

autor

Krełowski J.

• Center for Astronomy, Nicolaus Copernicus University, Gagarina 11, 87-100 Toruń, Poland

Bibliografia

• Allen, M.M. 1994, ApJ, 424, 754.
• Beals, C.S., and Blanchet, G.H. 1938, MNRAS, 98, 398.
• Cardelli, J.A., and Wallerstein, G. 1986, ApJ, 302, 492.
• Crane, P., Lambert, D.L., and Sheffer, Y. 1995, ApJS, 99, 107.
• Danks, A.C., Federman, S.R., and Lambert, D.L. 1984, A&A, 130, 62.
• Douglas, A.E., and Herzberg, G. 1941, ApJ, 94, 381.
• Federman, S.R. 1982, ApJ, 257, 125.
• Federman, S.R., Strom, C.J., Lambert, D.L., Cardelli, J.A., Smith, V.V. and Joseph, C.L. 1994, ApJ, 424, 772.
• Galazutdinov, G.A. 1992, Prep. Spets. Astrof. Obs., No 92..
• Galazutdinov, G.A., and Krełowski, J. 2012, MNRAS, 422, 3457.
• Gerö, L. 1941, Zeitschrift für Physik, 117, 709.
• Gredel. R., van Dishoeck, E.F., and Black J.H. 1993, A&A, 269, 477.
• Gredel. R., et al. 2011, A&A, 530, 26.
• Herbig, G.H. 1968, Zeitschrift für Astrophysik, 68, 243.
• Herzberg, G. 1950, “Molecular Spectra and Molecular Structure”, Vol. 1, “Spectra of Diatomic Molecules”, New York, D. Van Nostrand Co..
• Jeffries, J.B., Copeland, R.A., and Crosley, D.R. 1987, Journal of Quantitative Spectroscopy and Radiative Transfer, 37, 419.
• Kumar, A., Hsiao, C., Hung, W., and Lee, Y. 1998, Journal of Chemical Physics, 109, 3824.
• Larsson M., and Siegbahn P.E.M. 1983, Chemical Physics, 76, 175.
• Larsson M. A&A, 1983, 128, 291.
• Lien, D.J. 1984, ApJ, 284, 578.
• Liszt, H.S. 2007, A&A, 476, 291.
• Luque, J., and Crosley, D. 1996a, Journal of Chemical Physics, 104, 2146.
• Luque, J., and Crosley, D. 1996b, Journal of Chemical Physics, 104, 3907.
• Mattila, K. 1986, A&A, 160, 157.
• McKellar, A. 1940a, PASP, 52, 187.
• McKellar, A. 1940b, PASP, 52, 312.
• Mulliken, R.S. 1927, Phys. Rev., 30, 785.
• Savage, B.D., and Sembach, K.R. 1991, ApJ, 379, 245.
• Sheffer, Y., Rogers, M., Federman, S.R., Abel, N.P., Gredel, R., Lambert, D.L., and Shaw, G. 2008, ApJ, 687, 1075.
• Smith, W.H., Schempp, W.V., and Federman, S.R. 1984, ApJ, 277, 196.
• van Dishoeck, E.F., and Black, J.H. 1986, ApJS, 62, 109.
• van Dishoeck, E.F., and Black, J.H. 1989, ApJ, 340, 273.
• Weselak, T., Galazutdinov, G.A., Musaev, F.A., and Krełowski, J. 2004, A&A, 414, 949.
• Weselak, T., Galazutdinov, G.A., Musaev, F.A., and Krełowski, J. 2008a, A&A, 479, 149.
• Weselak, T., Galazutdinov, G.A., Musaev, F.A., and Krełowski, J. 2008b, A&A, 484, 381.
• Weselak, T., Galazutdinov, G.A., Musaev, F.A., Beletsky, Y., and Krełowski, J. 2009a, A&A, 495, 189.
• Weselak, T., Galazutdinov, G.A., Beletsky, Y., and Krełowski, J. 2009b, A&A, 499, 783.
• Weselak, T., Galazutdinov, G.A., Beletsky, Y., and Krełowski, J. 2009c, MNRAS, 400, 392.
• Weselak, T., Galazutdinov, G.A., Beletsky, Y., and Krełowski, J. 2010, MNRAS, 402, 1991.
• Weselak, T., Galazutdinov, G.A., Beletsky, Y., and Krełowski, J. 2011, Astron. Nachr., 332, 167.