activity
20052022
most citedNon-LTE Line-Formation and Abundances of Sulfur and Zinc in F, G, and K Stars

132 citations · 371 across the 16 of their papers we have counts for

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10 papers · 1 filter

astro-ph.SR2022★ 7 cited

Spectroscopic Observations of V455 Andromedae Superoutburst in 2007: the Most Exotic Spectral Features in Dwarf Nova Outbursts

Yusuke Tampo, Daisaku Nogami, Taichi Kato +10

We present our spectroscopic observations of V455 Andromedae during the 2007 superoutburst. Our observations cover this superoutburst from around the optical peak of the outburst t…

astro-ph.SR2020★ 1 cited

Spectrum variability of the active solar-type star Xi Bootis A

Yoichi Takeda, Satoshi Honda, Hikaru Taguchi +1

An extensive spectroscopic study on ξBoo A (chromospherically active solar-type star) was conducted based on the spectra obtained in 2008 December though 2010 May, with an aim to d…

astro-ph.SR2018★ 6 cited

Spectroscopic Determination of Capella's Photospheric Abundances: Possible Influence of Stellar Activity

Yoichi Takeda, Osamu Hashimoto, Satoshi Honda

Capella is a spectroscopic binary consisting of two G-type giants, where the primary (G8III) is a normal red-clump giant while the secondary (G0III) is a chromospherically-active f…

astro-ph.SR2018★ 9 cited

On the Nature of Long-Period Dwarf Novae with Rare and Low-Amplitude Outbursts

Mariko Kimura, Taichi Kato, Hiroyuki Maehara +35

There are several peculiar long-period dwarf-nova like objects, which show rare, low-amplitude outbursts with highly ionized emission lines. 1SWASP J162117441254, BD Pav, and V3…

astro-ph.SR2016★ 14 cited

Photospheric carbon and oxygen abundances of F-G type stars in the Pleiades cluster

Yoichi Takeda, Osamu Hashimoto, Satoshi Honda

In order to investigate the carbon-to-oxygen ratio of the young open cluster M45 (Pleiades), the C and O abundances of selected 32 F-G type dwarfs (in the effective temperature ran…

astro-ph.SR2014★ 51 cited

Optical and Near-Infrared Polarimetry of Highly Reddened Type Ia Supernova 2014J: Peculiar Properties of Dust in M82

K. S. Kawabata, H. Akitaya, M. Yamanaka +46

We presented optical and near-infrared multi-band linear polarimetry of the highly reddened Type Ia SN~2014J appeared in M82. SN~2014J exhibits large polarization at shorter wavele…