Sendai Astronomical Observatory

output

20092020

most citedPrecessing Warped Be Disk Triggering the Giant Outbursts in 2009 and 2011 in A 0535+262/V725 Tau

50 citations

5 papers

astro-ph.EP2020

Coupled macro spin model with two variables for polarity reversals in the Earth and the Sun

Ariyoshi Kunitomo, Akika Nakamichi, Tetsuya Hara

The structure of geomagnetism is very complex, and there are still some problems left in magnetohydrodynamics (MHD) simulations. Recently, the macro spin model has been suggested.…

astro-ph.SR2014★ 50 cited

Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. VI: The Sixth Year (2013-2014)

Taichi Kato, Pavol A. Dubovsky, Igor Kudzej +83

Continuing the project described by Kato et al. (2009, PASJ, 61, S395, arXiv:0905.1757), we collected times of superhump maxima for 56 SU UMa-type dwarf novae mainly observed durin…

astro-ph.SR2013★ 50 cited

Precessing Warped Be Disk Triggering the Giant Outbursts in 2009 and 2011 in A 0535+262/V725 Tau

Yuki Moritani, Daisaku Nogami, Atsuo T. Okazaki +8

We carried out optical high-dispersion spectroscopic monitoring of the Be disk in a Be/X-ray binary A 0535+262/V725 Tau from 2009 to 2012, covering two giant outbursts and several…

astro-ph.SR2012★ 21 cited

Five-Year Optical and Near Infrared Observations of the Extremely Slow Nova V1280 Scorpii

H. Naito, S. Mizoguchi, A. Arai +10

We present optical ( $B$ , $V$ , $R_{c}$ , $I_{c}$ and $y$ ) and near infrared ( $J$ , $H$ and $K_{s}$ ) photometric and spectroscopic observations of a classical nova V1280 Sc…

astro-ph.SR2009★ 11 cited

Discovery of Multiple High-Velocity Narrow Circumstellar Na I D Lines in Nova V1280 Sco

Kozo Sadakane, Akito Tajitsu, Sahori Mizoguchi +2

We discovered multiple high-velocity (ranging from -900 to -650 km/s) and narrow (FWHM = 15 km/s) absorption components corresponding to both the D2 and the D1 lines of Na I on a h…