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Your search keyword '"Singh, Mridweeka"' showing total 14 results
Start Over Author "Singh, Mridweeka" Journal monthly notices of the royal astronomical society
14 results on '"Singh, Mridweeka"'

2. Optical studies of a bright Type Iax supernova SN 2020rea

Author

Singh, Mridweeka, primary, Misra, Kuntal, additional, Sahu, Devendra K, additional, Ailawadhi, Bhavya, additional, Dutta, Anirban, additional, Howell, D Andrew, additional, Anupama, G C, additional, Bostroem, K Azalee, additional, Burke, Jamison, additional, Dastidar, Raya, additional, Gangopadhyay, Anjasha, additional, Hiramatsu, Daichi, additional, Im, Hyobin, additional, McCully, Curtis, additional, Pellegrino, Craig, additional, Srivastav, Shubham, additional, and Teja, Rishabh Singh, additional

Published
2022
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3. Photometric and spectroscopic evolution of the peculiar Type IIn SN 2012ab

Author

Gangopadhyay, Anjasha, primary, Turatto, Massimo, additional, Benetti, Stefano, additional, Misra, Kuntal, additional, Kumar, Brajesh, additional, Cappellaro, Enrico, additional, Pastorello, Andrea, additional, Tomasella, Lina, additional, Vanni, Sabrina, additional, Fiore, Achille, additional, Morales-Garoffolo, A, additional, Elias-Rosa, Nancy, additional, Singh, Mridweeka, additional, Dastidar, Raya, additional, Ochner, Paolo, additional, Tartaglia, Leonardo, additional, Kumar, Brijesh, additional, and Pandey, Shashi Bhushan, additional

Published
2020
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4. Optical studies of two stripped-envelope supernovae – SN 2015ap (Type Ib) and SN 2016P (Type Ic)

Author

Gangopadhyay, Anjasha, primary, Misra, Kuntal, additional, Sahu, D K, additional, Wang, Shan-Qin, additional, Kumar, Brajesh, additional, Li, Long, additional, Anupama, G C, additional, Dastidar, Raya, additional, Elias-Rosa, N, additional, Kumar, Brijesh, additional, Singh, Mridweeka, additional, Pandey, S B, additional, Sanwal, Pankaj, additional, Singh, Avinash, additional, Srivastav, S, additional, Tartaglia, L, additional, and Tomasella, L, additional

Published
2020
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5. SN 2015an: a normal luminosity type II supernova with low expansion velocity at early phases

Author

Dastidar, Raya, primary, Misra, Kuntal, additional, Valenti, Stefano, additional, Burke, Jamison, additional, Hosseinzadeh, Griffin, additional, Gangopadhyay, Anjasha, additional, Howell, D Andrew, additional, Singh, Mridweeka, additional, Arcavi, Iair, additional, Kumar, Brijesh, additional, McCully, Curtis, additional, Sanwal, Pankaj, additional, and Pandey, S B, additional

Published
2019
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6. Multiband optical variability of 3C 279 on diverse time-scales

Author

Agarwal, Aditi, primary, Cellone, Sergio A, additional, Andruchow, Ileana, additional, Mammana, Luis, additional, Singh, Mridweeka, additional, Anupama, G C, additional, Mihov, B, additional, Raj, Ashish, additional, Slavcheva-Mihova, L, additional, Özdönmez, Aykut, additional, and Ege, Ergün, additional

Published
2019
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7. SN 2016B a.k.a. ASASSN-16ab: a transitional Type II supernova

Author

Dastidar, Raya, primary, Misra, Kuntal, primary, Singh, Mridweeka, primary, Sahu, D K, primary, Pastorello, A, primary, Gangopadhyay, Anjasha, primary, Tomasella, L, primary, Benetti, S, primary, Terreran, G, primary, Sanwal, Pankaj, primary, Kumar, Brijesh, primary, Singh, Avinash, primary, Kumar, Brajesh, primary, Anupama, G C, primary, and Pandey, S B, primary

Published
2019
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8. Observational properties of a Type Ib supernova MASTER OT J120451.50+265946.6 in NGC 4080

Author

Singh, Mridweeka, primary, Misra, Kuntal, additional, Sahu, D K, additional, Dastidar, Raya, additional, Gangopadhyay, Anjasha, additional, Srivastav, Shubham, additional, Anupama, G C, additional, Bose, Subhash, additional, Lipunov, Vladimir, additional, Chakradhari, N K, additional, Kumar, Brajesh, additional, Kumar, Brijesh, additional, Pandey, S B, additional, Gorbovskoy, Evgeny, additional, and Balanutsa, Pavel, additional

Published
2019
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9. SN 2015ba: a Type IIP supernova with a long plateau

Author

Dastidar, Raya, primary, Misra, Kuntal, additional, Hosseinzadeh, G, additional, Pastorello, A, additional, Pumo, M L, additional, Valenti, S, additional, McCully, C, additional, Tomasella, L, additional, Arcavi, I, additional, Elias-Rosa, N, additional, Singh, Mridweeka, additional, Gangopadhyay, Anjasha, additional, Howell, D A, additional, Morales-Garoffolo, Antonia, additional, Zampieri, L, additional, Kumar, Brijesh, additional, Turatto, M, additional, Benetti, S, additional, Tartaglia, L, additional, Ochner, P, additional, Sahu, D K, additional, Anupama, G C, additional, and Pandey, S B, additional

Published
2018
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10. SN 2015as: a low-luminosity Type IIb supernova without an early light-curve peak

Author

Gangopadhyay, Anjasha, primary, Misra, Kuntal, primary, Pastorello, A, primary, Sahu, D K, primary, Tomasella, L, primary, Tartaglia, L, primary, Singh, Mridweeka, primary, Dastidar, Raya, primary, Srivastav, S, primary, Ochner, P, primary, Brown, Peter J, primary, Anupama, G C, primary, Benetti, S, primary, Cappellaro, E, primary, Kumar, Brajesh, primary, Kumar, Brijesh, primary, and Pandey, S B, primary

Published
2018
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11. Exploring the optical behaviour of a Type Iax supernova SN 2014dt

Author

Singh, Mridweeka, primary, Misra, Kuntal, additional, Sahu, D K, additional, Dastidar, Raya, additional, Gangopadhyay, Anjasha, additional, Bose, Subhash, additional, Srivastav, Shubham, additional, Anupama, G C, additional, Chakradhari, N K, additional, Kumar, Brajesh, additional, Kumar, Brijesh, additional, and Pandey, S B, additional

Published
2017
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12. Exploring the optical behaviour of a Type Iax supernova SN 2014dt.

Author

Singh, Mridweeka, Misra, Kuntal, Sahu, D. K., Dastidar, Raya, Gangopadhyay, Anjasha, Bose, Subhash, Srivastav, Shubham, Anupama, G. C., Chakradhari, N. K., Kumar, Brajesh, Kumar, Brijesh, and Pandey, S. B.

Subjects
*SUPERNOVAE, *TYPE I supernovae, *CATACLYSMIC variable stars, *PHOTOMETRY, *CHEMICAL synthesis
Abstract

We present optical photometric (up to ~410 d since Bmax) and spectroscopic (up to ***157 d since Bmax) observations of a Type Iax supernova (SN) 2014dt located in M61. SN 2014dt is one of the brightest and closest (D ~ 20 Mpc) discovered Type Iax SN. It best matches the light-curve evolution of SN2005hk and reaches a peak magnitude of MB ~ -18.13±0.04 mag with Δm15 ~ 1.35 ± 0.06 mag. The early spectra of SN 2014dt are similar to other Type Iax SNe, whereas the nebular spectrum at 157 d is dominated by narrow emission features with less blending as compared to SNe 2008ge and 2012Z. The ejecta velocities are between 5000 and 1000 km s-1, which also confirms the low-energy budget of Type Iax SN 2014dt compared to normal Type Ia SNe. Using the peak bolometric luminosity of SN 2005hk, we estimate the 56Ni mass of ~0.14 M⨀. The striking similarity between SN 2014dt and SN 2005hk implies that a comparable amount of 56Ni would have been synthesized in the explosion of SN 2014dt. [ABSTRACT FROM AUTHOR]

Published
2018
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14. Photometric and polarimetric observations of fast declining Type II supernovae 2013hj and 2014G.

Author

Bose, Subhash, Kumar, Brijesh, Misra, Kuntal, Matsumoto, Katsura, Kumar, Brajesh, Singh, Mridweeka, Fukushima, Daiki, and Kawabata, Miho

Subjects
GALACTIC X-ray sources, CATACLYSMIC variable stars, TYPE II supernovae, PHOTOMETRY, POLARIMETRY
Abstract

We present broad-band photometric and polarimetric observations of two Type II supernovae (SNe) 2013hj and 2014G. SN 2014G is a spectroscopically classified Type IIL event, which we also confirm photometrically because its light curve shows characteristic features - a plateau slope of 2.55 mag (100d)-1 in the V band and a duration of ∼77 d - of a generic Type IIL SN. However, SN 2013hj also shows a high plateau decline rate of 1.5 mag (100 d)-1 in the V band, similar to SNe IIL, but marginally lower than SNe IIL template light curves. Our high cadence photometric observations of SNe 2013hj and 2014G enables us to cover all characteristic phases up to the radioactive tail of optical light curves. Broad-band polarimetric observations reveal some polarization in SN 2013hj with subtle enhancement as the SN evolves towards the plateau end. However, the polarization angle remains constant throughout the evolution. This characteristic is consistent with the idea that the evolving SN with recombining hydrogen envelope is slowly revealing a more asymmetric central region of explosion. Modelling of the bolometric light curve yields a progenitor mass of ∼11M☉ with a radius of ∼700 R☉ for SN 2013hj, while for the SN 2014G model estimated progenitor mass is ∼9M☉ with a radius of ∼630 R☉, both having a typical energy budget of ∼2 × 1051 erg. [ABSTRACT FROM AUTHOR]

Published
2016
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