Abstract
We present the first phase resolved ultraviolet spectroscopic study of V Sge in high, intermediate and low states observed with the Hubble Space Telescope High Resolution Spectrograph (HST HRS) and International Ultraviolet Explorer (IUE) during the period 1978–1996 to diagnose the ultraviolet fluxes of C IV 1550 Å and He II 1640 Å emission lines originating in the accretion disk during different orbital phases. Different spectra showing the variations in line fluxes at different orbital phases are presented. The reddening of V Sge is determined from the 2200 Å feature. We concentrated on calculating the line fluxes of C IV & He II emission lines. From HST and IUE data, we derived an accretion luminosity and an accretion rate for V Sge. The average temperature of the outer rim of the accretion disk \({\sim}10000~\mbox{K}\). Our results show that there are variations in line fluxes, accretion luminosities and accretion rates with time for V Sge. These variations are attributed to the variations of both density and temperature as a result of a changing rate of mass transfer from the secondary star to the white dwarf. These results from the HST and IUE observations are consistent with the binary model consisting of a white dwarf, a disk around the white dwarf, and a lobe-filling main-sequence companion (Hachisu & Kato, Astrophys. J. 598:527H, 2003).
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Bruhweiler, F.: Private communication (2002)
Cordova, F.A., Howarth, I.D.: In: Kondo, Y. (ed.) Scientific Accomplishments of the IUE, p. 395. Reidel, Dordrecht (1986)
de Martino, D., Gänsicke, B.T.: Astrophys. Space Sci. 320, 135D (2009)
Diaz, M.P.: Publ. Astron. Soc. Pac. 111, 76 (1999)
Diaz, M.P., Steiner, J.: Astron. J. 110, 1816 (1995)
Gansicke, B.T., de Martino, D., Marsh, T.R., Haswell, C.A., et al.: Astrophys. Space Sci. 306, 177G (2006)
Gies, D.R., Shafter, A.W., Wiggs, M.S.: Astron. J. 115, 2566 (1998)
Gonzalez-Riestra, R., Cassatella, A., Wamsteker, W.: Astron. Astrophys. 373, 730G (2001)
Greiner, J., van Teeseling, A.: Astron. Astrophys. 339, L21 (1998)
Hachisu, I., Kato, M.: Astrophys. J. 558, 323 (2001)
Hachisu, I., Kato, M.: Astrophys. J. 598, 527H (2003)
Hachisu, I., Kato, M., Nomoto, K.: Astrophys. J. 470, L97 (1996)
Hachisu, I., Kato, M., Nomoto, K., Umeda, H.: Astrophys. J. 522, 487 (1999a)
Hachisu, I., Kato, M., Nomoto, K., Umeda, H.: Astrophys. J. 519, 314 (1999b)
Han, Z., Podsiadlowski, Ph.: Mon. Not. R. Astron. Soc. 368, 1095 (2006)
Herbig, G.H., Preston, G.W., Smak, J., Paczynski, B.: Astrophys. J. 141, 617H (1965)
Hoare, M.G., Drew, J.E.: Mon. Not. R. Astron. Soc. 249, 452H (1991)
Kato, T.: Publ. Astron. Soc. Jpn. 56S, 133K (2004)
Koch, R.H., Corcoran, M.F., Holenstein, B.D., McClusky, G.E.: Astrophys. J. 306, 618 (1986)
Lenz, D.D., Ayres, T.R.: Publ. Astron. Soc. Pac. 104, 1104 (1992)
Lockley, J.J., Wood, J.H.: In: Howell, S., Kuulkers, E., Woodward, C. (eds.) ASP Conf. Ser. 137, 13th North American Workshop on Cataclysmic Variables, p. 461. ASP, San Francisco (1998)
Lockley, J.J., Eyres, S.P.S., Wood, J.H.: Mon. Not. R. Astron. Soc. 287, L14 (1997)
Lockley, J.J., Wood, J.H., Eyres, S.P.S., Naylor, T., Shugarov, S.: Mon. Not. R. Astron. Soc. 310, 963 (1999)
Mader, J., Shafter, A.: Publ. Astron. Soc. Pac. 109, 1351 (1997)
Meng, X., Yang, W., Geng, X.: Publ. Astron. Soc. Jpn. 61, 1251 (2009)
Patterson, J., et al.: Publ. Astron. Soc. Pac. 110, 380 (1998)
Pringle, J.E., Verbunt, F.: In: Rolfe, E., Battrick, B. (eds.): Fourth European IUE Conference, ESA SP-128, p. 377 (1984)
Ramseyer, T.F., Dinerstein, H.L., Lester, D.F., Provencal, J.: Astron. J. 106, 1191 (1993)
Robertson, J.W., Honeycutt, R.K., Pier, J.R.: Astron. J. 113, 787 (1997)
Rodriguez-Pascual, P.M., Gonzalez-Riestra, R., Schartel, N., Wamsteker, W.: Astron. Astrophys. Suppl. Ser. 139, 183R (1999)
Sanad, M.R.: New Astron. 27, 63 (2014)
Sanad, M.R., Bobrowsky, M.: Astrophys. Space Sci. 344, 405 (2013)
Simon, V., Mattei, J.A.: ASP Conf. Ser. 330, 343S (2005)
Simon, V., Shugarov, S., Marsakova, V.I.: Astron. Astrophys. 366, 100 (2001)
Simon, V., Hric, L., Petrıć, K., Shugarov, S., Niarchos, P., Marsakova, V.I.: Astron. Astrophys. 393, 921 (2002)
Smak, J.I., Belczynski, K., Zola, S.: Acta Astron. 51, 117 (2001)
Steiner, J.E., Diaz, M.P.: Publ. Astron. Soc. Pac. 110, 276 (1998)
Szkody, P.: In: Burke, W.R. (ed.) Recent Results on Cataclysmic Variables ESA SP-326, p. 39 (1985)
Verbunt, F.: Astron. Astrophys. Suppl. Ser. 71, 339V (1987)
Vitello, P., Shlosman, I.: Astrophys. J. 410, 815V (1993)
Walsh, J.R.: ESOC 53, 27W (1995)
Williams, G., King, A.R., Uomoto, A.K., Hiltner, W.A.: Mon. Not. R. Astron. Soc. 219, 809 (1986)
Wood, J.H., Lockley, J.J.: In: Wickramasinghe, D.T., Bicknell, G.V., Ferrario, L. (eds.) IAU Colloq. 163, Accretion Phenomena and Related Outflows. ASP Conf. Ser., vol. 121, p. 457. ASP, San Francisco (1997)
Wood, J.H., Lockley, J.J.: Mon. Not. R. Astron. Soc. 313, 789 (2000)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Sanad, M.R. Ultraviolet spectroscopy of V Sagittae in high, intermediate and low states from HST and IUE satellites. Astrophys Space Sci 360, 31 (2015). https://doi.org/10.1007/s10509-015-2542-x
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s10509-015-2542-x