Browsing by Author "Yoshii, Y."

Now showing items 1-3 of 3

    • Low luminosity Type II supernovae – II. Pointing towards moderate mass precursors 
      Spiro, S.; Pastorello, A.; Pumo, M. L.; Zampieri, L.; Turatto, M.; Smartt, S. J.; Benetti, S.; Cappellaro, E.; Valenti, S.; Agnoletto, I.; Altavilla, G.; Aoki, T.; Brocato, E.; Corsini, E. M.; Di Cianno, A.; Eliás Rosa, N.; Hamuy Wackenhut, Mario; Enya, K.; Fiaschi, M.; Folatelli, Gastón; Desidera, S.; Harutyunyan, A.; Howell, D. A.; Kawka, A; Kobayashi, Y.; Leibundgut, B.; Minezaki, T.; Navasardyan, H.; Nomoto, K.; Mattila, S.; Pietrinferni, A.; Pignata Libralato, Giuliano; Raimondo, G.; Salvo, M.; Schmidt, B. P.; Sollerman, J.; Spyromilio, J.; Taubenberger, S.; Valentini, G.; Vennes, S.; Yoshii, Y. (Oxford University Press, 2014)
      We present new data for five underluminous Type II-plateau supernovae (SNe IIP), namely SN 1999gn, SN 2002gd, SN 2003Z, SN 2004eg and SN 2006ov. This new sample of lowluminosity SNe IIP (LL SNe IIP) is analysed together ...
    • Twelve years of X-ray and optical variability in the Seyfert galaxy NGC 4051 
      Breedt, E.; McHardy, I. M.; Arévalo, P.; Uttley, P.; Sergeev, S. G.; Minezaki, T.; Yoshii, Y.; Sakata, Y.; Lira Teillery, Paulina; Chesnok, N. G. (2009)
      We discuss the origin of the optical variations in the Narrow line Seyfert 1 galaxy NGC 4051 and present the results of a cross-correlation study using X-ray and optical light curves spanning more than 12 years. The ...
    • Ultraviolet Fe II emission in z ∼ 2 quasars 
      Sameshima, H.; Maza Sancho, José; Matsuoka, Y.; Oyabu, S.; Kawara, K.; Yoshii, Y.; Asami, N.; Ienaka, N.; Tsuzuki, Y. (WILEY-BLACKWELL PUBLISHING, 2009)
      We present spectra of six luminous quasars at z ∼ 2, covering rest wavelengths 1600−3200 Å. The fluxes of the UV Fe II emission lines and MgII λ2798 doublet, the line widths of Mg II and the 3000 Å luminosity were obtained ...