16 research outputs found
Evolution of A Peculiar Type Ibn Supernova SN 2019wep
We present a high-cadence short term photometric and spectroscopic monitoring
campaign of a type Ibn SN 2019wep, which is one of the rare SN Ibn after SNe
2010al and 2019uo to display signatures of flash ionization (\ion{He}{2},
\ion{C}{3}, \ion{N}{3}). We compare the decline rates and rise time of SN
2019wep with other SNe Ibn and fast transients. The post-peak decline in all
bands (0.1 mag d) are consistent with SNe Ibn but less than the fast
transients. On the other hand, the m values are slightly lower
than the average values for SNe Ibn but consistent with the fast transients.
The rise time is typically shorter than SNe Ibn but longer than fast
transients. SN 2019wep lies at the fainter end of SNe Ibn but possesses an
average luminosity amongst the fast transients sample. The peculiar color
evolution places it between SNe Ib and the most extreme SNe Ibn. The bolometric
light curve modelling shows resemblance with SN 2019uo with ejecta masses
consistent with SNe Ib. SN 2019wep belongs to the "P cygni" sub-class of SNe
Ibn and shows faster evolution in line velocities as compared to the "emission"
sub-class. The post-maximum spectra show close resemblance with ASASSN-15ed
hinting it to be of SN Ib nature. The low \ion{He}{1} CSM velocities and
residual H further justifies it and gives evidence of an intermittent
progenitor between WR and LBV star.Comment: 19 pages, 14 figures, 2 Tables, Accepted for publication in ApJ main
journa
Experimental and Numerical Investigations of Effects of Flow Control Devices Upon Flat-Plate Film Cooling Performance
A Patient-Derived EZH2 Mutant Induces MDS-like Diseases with Derepressed ABCG2 Expression in Mice
Mechanisms for proteinase-activated receptor 1-triggered prostaglandin E2 generation in mouse osteoblastic MC3T3-E1 cells
sj-pdf-1-ojs-10.1177_23259671241229079 – Supplemental material for Association of Head-Neck Rotation With History of Pitching-Related Elbow Pain in Youth Baseball Players
Supplemental material, sj-pdf-1-ojs-10.1177_23259671241229079 for Association of Head-Neck Rotation With History of Pitching-Related Elbow Pain in Youth Baseball Players by Masumi Yoshimoto, Masashi Kawabata, Toru Miyata, Yosuke Sato, Daichi Naoi, Mitsuaki Ashihara, Nobuyuki Suzuki, Chihiro Ikoma, Hiroaki Tatsuki, Ryota Kuratsubo, Hiroyuki Watanabe, Yohei Kusaba and Daiki Watanabe in Orthopaedic Journal of Sports Medicine</p
Application of a Stepwise Flow Ratiometry without Phase Separation to the Determination of the Chloroform/Water Distribution Coefficients of Volatile Diazines
Peripheral HMGB1-induced hyperalgesia in mice: Redox state-dependent distinct roles of RAGE and TLR4
A case of acute coronary syndrome caused by delayed coronary ischemia after transcatheter aortic valve implantation
Attenuated fusogenicity and pathogenicity of SARS-CoV-2 Omicron variant
The emergence of the Omicron variant of SARS-CoV-2 is an urgent global health concern(1). In this study, our statistical modelling suggests that Omicron has spread more rapidly than the Delta variant in several countries including South Africa. Cell culture experiments showed Omicron to be less fusogenic than Delta and than an ancestral strain of SARS-CoV-2.Although the spike (S) protein of Delta is efficiently cleaved into two subunits, which facilitates cell-cell fusion(2,3), the Omicron S protein was less efficiently cleaved compared to the S proteins of Delta and ancestral SARS-CoV-2. Furthermore, in a hamster model, Omicron showed decreased lung infectivity and was less pathogenic compared to Delta and ancestral SARS-CoV-2. Our multiscale investigations reveal the virological characteristics of Omicron, including rapid growth in the human population, lower fusogenicity and attenuated pathogenicity