21 citations · 24 across the 4 of their papers we have counts for
4 papers
On the Formation of the W-shaped O II Lines in Spectra of Type I Superluminous Supernovae
Sei Saito, Masaomi Tanaka, Paolo A. Mazzali +2
H-poor superluminous supernovae (SLSNe-I) are characterized by O II lines around 4,000 - 4,500 A in pre-/near-maximum spectra, so-called W-shaped O II lines. As these lines are fro…
Intermediate-luminosity Type IIP SN 2021gmj: a low-energy explosion with signatures of circumstellar material
Yuta Murai, Masaomi Tanaka, Miho Kawabata +28
We present photometric, spectroscopic and polarimetric observations of the intermediate-luminosity Type IIP supernova (SN) 2021gmj from 1 to 386 days after the explosion. The peak…
Constraints on Explosion Timescale of Core-Collapse Supernovae Based on Systematic Analysis of Light Curves
Sei Saito, Masaomi Tanaka, Ryo Sawada +1
Explosion mechanism of core-collapse supernovae is not fully understood yet. In this work, we give constraints on the explosion timescale based on Ni synthesized by supernov…
Late-Phase Spectropolarimetric Observations of Superluminous Supernova SN 2017egm to Probe the Geometry of the Inner Ejecta
Sei Saito, Masaomi Tanaka, Takashi J. Moriya +6
We present our spectropolarimetric observations of SN 2017egm, a Type I superluminous supernova (SLSN-I) in a nearby galaxy NGC 3191, with Subaru telescope at 185.0 days after the…