Zobrazeno 1 - 10
of 105
pro vyhledávání: '"Alak Ray"'
Publikováno v:
Journal of Astrophysics and Astronomy. 42
The spectral region between 1250–3000 $$\AA $$ contains important spectral lines to understand the morphological structures and evolution of planetary nebulae. This is the region sampled by UVIT through various filter bands both in the continuum an
Publikováno v:
The Astrophysical Journal. 933:194
Red supergiant stars lose a lot of mass in slow winds that forms a circumstellar medium (CSM) around the star. When the star retains a substantial hydrogen envelope at the time of explosion, it displays characteristic light curves and spectra of a Ty
Autor:
A. J. Nayana, Alak Ray, Peter Lundqvist, Benjamin J. Shappee, Francesco Taddia, C. I. Bjornsson, Poonam Chandra
We present radio observations of a Type Ib supernova (SN) Master OT J120451.50+265946.6. Our low frequency Giant Metrewave Radio Telescope (GMRT) data taken when the SN was in the optically thick phase for observed frequencies reveal inhomogeneities
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::701e5ad5e59926d7d91c3b20e1f33786
Publikováno v:
The Astrophysical Journal. 894:118
The distribution of stars in the Hertzsprung Russell diagram (HRD) for a stellar conglomeration represents a snapshot of its evolving stellar population. Some of the supergiant stars may transit the HRD from blue to red and then again to blue during
Autor:
Gururaj A. Wagle, Alak Ray
Publikováno v:
The Astrophysical Journal. 889:86
It has been well established from a variety of observations that red supergiants (RSGs) loose a lot of mass in stellar wind. Dust formed in this emitted gas over a few decades before core-collapse can lead to substantial extinction and obscure the in
Autor:
Alak Ray, D. Raghunandan
Publikováno v:
Science and Culture. 86:1
Autor:
Alak Ray
Publikováno v:
Science and Culture. 86:28
Publikováno v:
The Astrophysical Journal. 886:27
We present the evolution of massive star progenitors of supernovae of type IIP. We take the example of the nearby and well-studied SN 2013ej. We explore how convective overshoot affects the stellar structure, surface abundances, and effective tempera
Autor:
Alak Ray
Publikováno v:
Nature Astronomy. 1
First the neutrinos arrived, then the burst of light: messengers of a cataclysmic event in the galaxy next door. Alak Ray recounts IAUS 331, a conference that celebrated the thirtieth anniversary of the supernova of a lifetime, SN1987A, and explored
Autor:
Alak Ray, Sanskriti Das
We show how the dense shells of circumstellar gas immediately outside the red supergiants (RSGs) can affect the early optical light curves of Type II-P SNe taking the example of SN 2013ej. The peak in V, R and I bands, decline rate after peak and pla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f89f16e1e579c10f23aacdf576ab1de4