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Infrared Space Observatory and Ground-Based Infrared Observation of the Classical Nova V723 Cassiopeiae

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We present observations of the classical nova V723 Cassiopeiae (Nova Cas 1995), obtained both with the Infrared Space Observatory (ISO) and from the ground. The infrared spectrum was dominated in the first year by H and He recombination lines, and at later times by coronal lines. The H recombination lines imply a reddening of E(B-V) = 0.78, an electron temperature of 7000 K, and an electron density of 2 × 108 cm-3 on day 250. We argue that the high-ionization species in the infrared are most likely the result of collisional ionization rather than photoionization and are therefore truly "coronal"; we estimate a temperature of 3.2 × 105 K in the coronal region and abundance ratios of S/Si 2.1, Ca/Si 1.6, and Al/Si 1.5. The ejected mass as determined from the Brα line was 2.6 × 10-5 M⊙ for a distance of 4 kpc; however, the mass deduced from the free-free emission, which we conclude arises primarily in the coronal zone, is 4.3 × 10-4 M⊙. V723 Cas did not display the [O IV] 25.89 μm fine-structure line, which was typically seen in the spectra of novae observed with ISO. There was no evidence of dust emission in V723 Cas.
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Bath, G. T., & Harkness, R. P. 1989, in Classical Novae,ed. M. F. Bode & A. Evans (Chichester, NY: Wiley), 61 Benjamin, R. A., & Dinerstein, H. L. 1990, AJ, 100, 1588 Berrington, K. A., Saraph, H. E., & Tully, J. A. 1998, A&AS, 129, 161 Blaha, M. 1969, A&A, 1, 42 Bode, M. F., & Evans, A. 1989, in Classical Novae, ed. M.F. Bode & A. Evans (Chichester, NY: Wiley), 163 Callus, C. M., Evans, A., Albinson, J. S., Mitchell, R. M.,Bode, M. F.,Jameson, R. F.,King, A. R., & Sherrington,M. 1987, MNRAS, 229, 539 Cardelli, J. A., Clayton, G. C., & Mathis, J. S. 1989, ApJ, 345, 245 Chochol, D., O’Brien, T. J., & Bode, M. F. 1999, Proc. Warner Symp.,Cataclysmic Variables: A 60h Birthday Symposium in Honor of Brian Warner, ed. P. Charles, E. Kuulkers, & T. Shahbaz (Oxford: Elsevier) Chochol, D., & Pribulla, T. 1997, Contrib. Astron.Obs.Skalnate´ Pleso, 27,53 Chochol, D., Pribulla, T., Shemmer, O., Retter,A.,Shugarov, S. Y.,Goranskij, V. P., & Katysheva,N. A. 2000, IAU Circ., No. 7351 Clegg, P. E., et al. 1996, A&A, 315, L38 de Graauw, Th., et al. 1996, A&A, 315, L49 Della Valle,M., & Livio,M. 1995, ApJ, 452, 704 Dinerstein, H. L. 1986, AJ, 92, 1381 Drechsel, H., Rahe, J., Du¨rbeck, H. W., Kohoutek, H.W., & Seitter, W. C.1977, A&AS, 30, 323 Durbeck, H. W. 1981, PASP, 93, 165 Ennis, D., Beckwith, S., Gatley, I., Matthews, K., Becklin, E. E., Elias, J.,Neugebauer, G., & Willner, S. P. 1977, ApJ, 214, 478 Evans, A., Geballe, T. R., Rawlings, J. M. C., Eyres, S. P. S., & Davies,J. K. 1997, MNRAS, 292, 192 Eyres, S. P. S., Davis, R. J.,Watson, S. K., & Bode, M. F. 1997, IAU Circ.,No. 6594 Gehrz, R. D. 1988, ARA&A, 26, 377. 1990, in IAU Colloq.122, Physics of Classical Novae, ed. R. Viotti & A. Cassatella (New York: Springer), 138 Gehrz, R. D., Truran, J. W., Williams, R. E., & Starrfield, S. 1998, PASP,110, 3 Geisel, S. L., Kleinmann, D. E., & Low, F. J. 1970, ApJ, 161, L101 Gonzalez-Riestra, R., Shore, S. N., Starrfield, S., & Krautter, J. 1996, IAU Circ., No. 6295 Greenhouse, M. A., Grasdalen, G. L., Woodward, C. E.,Benson, J.,Gehrz, R. D., Rosenthal, E., & Skrutskie, M. F. 1990, ApJ, 352, 307 Gry, C., et al. 2002, The ISO Handbook, Vol. 3, The Long Wavelength Spectrometer, Version 2.0 (ESA SP-1262, SAI-99-077/Dc) (Noordwijk:ESA) Harrison, T. E., & Gehrz, R. D. 1988, AJ, 96, 1001 Heywood, I., O’Brien, T. J., Eyres, S. P. S., Bode, M. F.,& Davis, R. J.2002, in AIP Conf. Proc. 637, Classical Nova Explosions, ed.M. Hernanz& J. Jose´ (Woodbury, NY: AIP), 242 2003, MNRAS, submitted Hirosawa, K., & Yamamoto,M. 1995, IAU Circ., No. 6213 Hjellming, R.M., Wade, C. M., Vandenberg, N. R., & Newell,R. T. 1979,AJ, 84, 1619 Hummer, D. G., & Seaton, M. J. 1964, MNRAS, 127, 217 Iijima, T., & Rosino, L. 1995, IAU Circ., No. 6214 Iijima, T., Rosino, L., & Della Valle,M. 1998, A&A, 338,1006 Jain, N. K., & Narain, U. 1978, A&AS, 31, 1 Johnson, J. J., Bjorkman, K. S., & Babler, B. L. 1996, IAU Circ., No. 6283 Joyce, R. R. 1992, in ASP Conf. Ser. 23, Astronomical CCD Observations and Reduction Techniques, ed. S. B. Howell (San Francisco: ASP), 258 Joyce, R. R., Fowler, A. M., & Heim, G. B. 1994, Proc. SPIE, 2198, 725 Kamath, U. S., & Ashok, N. M. 1999, A&AS, 136, 107 Kessler, M., et al. 1996, A&A, 315, L27 Kobayashi, N., Nagata, T., Takeuchi, T., Takami, H., & Sato, S. 1996,in ASP Conf. Ser. 97, Polarimetry of the Interstellar Medium, ed.W. G. Roberge &D. C. B.Whittet (San Francisco: ASP), 106 Kovetz, A., & Prialnik, D. 1985, ApJ, 291, 812 Krautter, J., et al. 2002, AJ, 124, 2888 Kurucz, R. L. 1979, ApJS, 40, 1 Leech, K., et al. 2002, The ISO Handbook, Vol. 5, The Short Wavelength Spectrometer, Version 2.0 (ESA SP-1262, SAI/2000-008/Dc)(Noordwijk: ESA) Livio, M. 1992, ApJ, 393, 516 Lyke, J. E., et al. 2001, AJ, 122, 3305 .2003, AJ, 126, 993 Mason, C. G., Gehrz, R. D., Woodward, C. E., Smilowitz, J. B.,Greenhouse, M. A., Hayward, T. L., & Houck, J. R. 1996,ApJ, 470,577 Mason, C. G., Gehrz, R. D.,Woodward, C. E., Smilowitz, J. B., Hayward,T. L., & Houck, J. R. 1998, ApJ, 494, 783 Munari U., et al. 1996, A&A, 315, 166 Ohsima, O., Akazawa, H., & Ohkura, N. 1996, Inf. Bull. Variable Stars,No. 4295 Payne-Gaposchkin, C. 1957, The Galactic Novae (Amsterdam: North-Holland) Ritter, H., & Kolb, U. 1998, A&AS, 129, 83 Rudy, R. J., Lynch, D. K., Mazuk, S., Venturini, C. C.,Puetter, R. C., & Perry, R. B. 2003, BAAS, 34, 1162 Rudy, R. J., Venturini, C. C., Lynch, D. K., Mazuk, S., & Puetter, R. C.2002, ApJ, 573, 794 Saizar, P., & Ferland,G. J. 1994, ApJ, 425, 755 Salama, A., et al. 1998, in ISO’s View of Stellar Evolution, ed. L. B. F. M.Waters, C. Waelkens, K. A. van der Hucht, & P. A. Zaal (Dordrecht:Kluwer), 227 Salama, A., Evans, A., Eyres, S. P. S., Leech, K., Barr, P., & Kessler, M. F.1996, A&A, 315, L209 Salama, A., Eyres, S. P. S., Evans, A., Geballe, T. R., & Rawlings, J. M. C.1999, MNRAS, 304, L20 Starrfield, S., Truran, J. W., & Sparks, W. M. 2000, NewA Rev., 44, 81 Starrfield, S., Truran, J. W., Wiescher, M. C., & Sparks, W. M. 1998,MNRAS, 296, 502 Storey, P. J., & Hummer, D. G. 1995, MNRAS, 272, 41 (SH95) Tokunaga, A. T. 2000, in Allen’s Astrophysical Quantities,ed A. N. Cox (4th ed.; New York: Springer) Venturini, C. C., Rudy, R. J., Lynch, D. K., Mazuk, S., & Puetter, R. C.2002, AJ, 124, 3009 Warner, B. 1989, in Classical Novae, ed. M. F. Bode & A. Evans (New York: Wiley), 1 1995, Cataclysmic Variable Stars (Cambridge: Cambridge Univ.Press) Williams, P. M., Longmore, A. J., & Geballe, T. R. 1996, MNRAS, 279,804 Zhang, H. L., Graziani,M., & Pradhau, A. K. 1994, A&A, 283,319
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