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pro vyhledávání: '"Banerjee, Projjwal"'
The recent detection of large column density absorption lines from highly ionized gas in a few directions through the circumgalactic medium (CGM) of the Milky Way (MW) has been puzzling. The inferred temperature from these absorption lines far exceed
Externí odkaz:
http://arxiv.org/abs/2408.14351
Autor:
Jeena, S. K., Banerjee, Projjwal
Publikováno v:
Open Journal of Astrophysics 7 (2024)
Signature from Pop III massive stars of $140$--$260\,{\rm M_\odot}$ that end their lives as pair-instability supernovae (PISNe) are expected to be seen in very metal-poor (VMP) stars of ${\rm [Fe/H]}\leq -2$. Although thousands of VMP stars have been
Externí odkaz:
http://arxiv.org/abs/2408.02643
Autor:
Jeena, S. K., Banerjee, Projjwal
Publikováno v:
The Astrophysical Journal, 2024, 975, 108
Very metal-poor (VMP) stars (${\rm [Fe/H]}\leq -2$) that have sub-solar values of ${\rm [X/Fe]}$ for $\alpha$ elements such as Mg, Si, and Ca, are referred to as $\alpha$-poor VMP stars. They are quite rare among VMP stars and are thought to have for
Externí odkaz:
http://arxiv.org/abs/2407.04026
Low-metallicity very massive stars with an initial mass of $\sim 140$--$260\, {\rm M_\odot}$ are expected to end their lives as pair-instability supernovae (PISNe). The abundance pattern resulting from a PISN differs drastically from regular core-col
Externí odkaz:
http://arxiv.org/abs/2310.00591
Very metal-poor stars that have $[\text{Fe}/\text{H}]<-2$ and that are enhanced in C relative to Fe ($[\text{C}/\text{Fe}]>+0.7$) but have no enhancement of heavy elements ($[\text{Ba}/\text{Fe}]<0$) are known as carbon-enhanced metal-poor (CEMP-no)
Externí odkaz:
http://arxiv.org/abs/2306.06433
Autor:
Wu, Meng-Ru, Banerjee, Projjwal
Although the multimessenger detection of the neutron star merger event GW170817 confirmed that mergers are promising sites producing the majority of nature's heavy elements via the rapid neutron-capture process ($r$-process), a number of issues relat
Externí odkaz:
http://arxiv.org/abs/2205.11806
GW170817 has confirmed binary neutron star mergers as one of the sites for rapid neutron capture ($r$) process. However, there are large theoretical and experimental uncertainties associated with the resulting nucleosynthesis calculations and additio
Externí odkaz:
http://arxiv.org/abs/2110.05449
We develop a method to compute thermally-mediated transition rates between the ground state and long-lived isomers in nuclei. We also establish criteria delimiting a thermalization temperature above which a nucleus may be considered a single species
Externí odkaz:
http://arxiv.org/abs/2010.15238
Autor:
Grimmett, J. J., Müller, Bernhard, Heger, Alexander, Banerjee, Projjwal, Obergaulinger, Martin
Hypernovae powered by magnetic jets launched from the surface of rapidly rotating millisecond magnetars are one of the leading models to explain broad-lined Type Ic supernovae (SNe Ic-BL), and have been implicated as an important source of metal enri
Externí odkaz:
http://arxiv.org/abs/2010.06766
Publikováno v:
The Astrophysical Journal Letters, 902:L34, 2020
Binary neutron star mergers (BNSMs) is currently the most promising source of \textsl{r}-process thanks to the detection of GW170817. The estimated occurring frequency and the amount of mass ejected per merger indicate that BNSMs by itself can accoun
Externí odkaz:
http://arxiv.org/abs/2007.04442