Nogami, D, Hiroi, K, Suzuki, Y, Moritani, Y, Soejima, Y, Imada, A, Hashimoto, O, Kinugasa, K, Honda, S, Ayani, K, Narusawa, S, Naito, H, Sakamoto, M, Iijima, T, Fujii, M, Narita, N
The Eighth Pacific Rim Conference on Stellar Astrophysics: A Tribute to Kam-Ching Leung ASP Conference Series, Vol. 404, proceedings of the conference held 5-9 May, 2008, at Merlin Beach Hotel, Phuket, Thailand. Edited by B. Soonthornthum, S. Komonjinda, K.S. Cheng, and K.C. Leung San Francisco: Astronomical Society of the Pacific 404 52-+ 2009年 査読有り
We carried out intensive spectroscopic observations of two WZ Sge-type dwarf novae, GIN Lib, and V455 And during their superoutbursts in 2007, at 6 observatories. The observations covered the whole of both superoutbursts from the very maximum to the fading tail. We found evidence of the winds having a speed of similar to 1000 km s(-1) which blew in GW Lib during the rising phase. The evolution of the hydrogen, helium, and carbon lines suggests flaring of the accretion disk and emergence of the temperature inversion layer on the disk.