Zobrazeno 1 - 10
of 28 810
pro vyhledávání: '"A, Hiramatsu"'
Autor:
Baer-Way, Raphael, Chandra, Poonam, Modjaz, Maryam, Kumar, Sahana, Pellegrino, Craig, Chevalier, Roger, Crawford, Adrian, Sarangi, Arkaprabha, Smith, Nathan, Maeda, Keiichi, Nayana, A. J., Filippenko, Alexei V., Andrews, Jennifer E., Arcavi, Iair, Bostroem, K. Azalee, Brink, Thomas G., Dong, Yize, Dwarkadas, Vikram, Farah, Joseph R., Howell, D. Andrew, Hiramatsu, Daichi, Hosseinzadeh, Griffin, McCully, Curtis, Meza, Nicolas, Newsome, Megan, Gonzalez, Estefania Padilla, Pearson, Jeniveve, Sand, David J., Shrestha, Manisha, Terreran, Giacomo, Valenti, Stefano, Wyatt, Samuel, Yang, Yi, Zheng, WeiKang
While the subclass of interacting supernovae with narrow hydrogen emission lines (SNe IIn) consists of some of the longest-lasting and brightest SNe ever discovered, their progenitors are still not well understood. Investigating SNe IIn as they emit
Externí odkaz:
http://arxiv.org/abs/2412.06914
Autor:
Hiramatsu, Daichi, Berger, Edo, Gomez, Sebastian, Blanchard, Peter K., Kumar, Harsh, Athukoralalage, Wasundara
We present the largest uniform study to date of Type IIn supernovae (SNe IIn), focusing in this first paper on the multi-band optical light curves of $487$ SNe IIn. The sample, constructed from multiple surveys, extends to $z \approx 0.8$, with the m
Externí odkaz:
http://arxiv.org/abs/2411.07287
Autor:
Ravi, Aravind P., Valenti, Stefano, Dong, Yize, Hiramatsu, Daichi, Barmentloo, Stan, Jerkstrand, Anders, Bostroem, K. Azalee, Pearson, Jeniveve, Shrestha, Manisha, Andrews, Jennifer E., Sand, David J., Hosseinzadeh, Griffin, Lundquist, Michael, Hoang, Emily, Mehta, Darshana, Retamal, Nicolas Meza, Martas, Aidan, Jha, Saurabh W., Janzen, Daryl, Subrayan, Bhagya, Howell, D. Andrew, McCully, Curtis, Farah, Joseph, Newsome, Megan, Gonzalez, Estefania Padilla, Terreran, Giacomo, Andrews, Moira, Filippenko, Alexei V., Brink, Thomas G., Zheng, Weikang, Yang, Yi, Vinko, Jozsef, Wheeler, J. Craig, Smith, Nathan, Rho, Jeonghee, Konyves-Toth, Reka, Gutierrez, Claudia P.
We present supernova (SN) 2023ufx, a unique Type IIP SN with the shortest known plateau duration ($t_\mathrm{PT}$ $\sim$47 days), a luminous V-band peak ($M_{V}$ = $-$18.42 $\pm$ 0.08 mag), and a rapid early decline rate ($s1$ = 3.47 $\pm$ 0.09 mag (
Externí odkaz:
http://arxiv.org/abs/2411.02493
Autor:
Gkini, A., Fransson, C., Lunnan, R., Schulze, S., Poidevin, F., Sarin, N., Könyves-Tóth, R., Sollerman, J., Omand, C. M. B., Brennan, S. J., Hinds, K. R., Anderson, J. P., Bronikowski, M., Chen, T. -W., Dekany, R., Fraser, M., Fremling, C., Galbany, L., Gal-Yam, A., Gangopadhyay, A., Geier, S., Gonzalez, E. P., Gromadzki, M., Groom, S. L., Gutiérrez, C. P., Hiramatsu, D., Howell, D. A., Hu, Y., Inserra, C., Kopsacheili, M., Lacroix, L., Masci, F. J., Matilainen, K., McCully, C., Moore, T., Müller-Bravo, T. E., Nicholl, M., Pellegrino, C., Pérez-Fournon, I., Perley, D. A., Pessi, P. J., Petrushevska, T., Pignata, G., Ragosta, F., Sahu, A., Singh, A., Srivastav, S., Wise, J. L., Yan, L., Young, D. R.
We present photometric and spectroscopic observations of SN2020xga and SN2022xgc, two hydrogen-poor superluminous supernovae (SLSNe-I) at $z = 0.4296$ and $z = 0.3103$ respectively, that show an additional set of broad Mg II absorption lines, blueshi
Externí odkaz:
http://arxiv.org/abs/2409.17296
Autor:
Yesmin, N., Pellegrino, C., Modjaz, M., Baer-Way, R., Howell, D. A., Arcavi, I., Farah, J., Hiramatsu, D., Hosseinzadeh, G., McCully, C., Newsome, M., Gonzalez, E. Padilla, Terreran, G., Jha, S.
Due to high-cadence automated surveys, we can now detect and classify supernovae (SNe) within a few days after explosion, if not earlier. Early-time spectra of young SNe directly probe the outermost layers of the ejecta, providing insights into the e
Externí odkaz:
http://arxiv.org/abs/2409.04522
Autor:
Gangopadhyay, Anjasha, Dukiya, Naveen, Moriya, Takashi J, Tanaka, Masaomi, Maeda, Keiichi, Howell, D. Andrew, Singh, Mridweeka, Singh, Avinash, Sollerman, Jesper, Kawabata, Koji S, Brennan, Sean J, Pellegrino, Craig, Dastidar, Raya, Nakaoka, Tatsuya, Kawabata, Miho, Misra, Kuntal, Schulze, Steve, Chandra, Poonam, Taguchi, Kenta, Sahu, Devendra K, McCully, Curtis, Bostroem, K. Azalee, Gonzalez, Estefania Padilla, Newsome, Megan, Hiramatsu, Daichi, Takei, Yuki, Yamanaka, Masayuki, Tajitsu, Akito, Isogai, Keisuke
We present the long-term photometric and spectroscopic analysis of a transitioning SN~IIn/Ibn from $-$10.8 d to 150.7 d post $V$-band maximum. SN~2021foa shows prominent He {\sc i} lines comparable in strength to the H$\alpha$ line around peak, placi
Externí odkaz:
http://arxiv.org/abs/2409.02666
Autor:
Gagliano, A., Berger, E., Villar, V. A., Hiramatsu, D., Kessler, R., Matsumoto, T., Gilkis, A., Laplace, E.
Enhanced emission in the months to years preceding explosion has been detected for several core-collapse supernovae (SNe). Though the physical mechanisms driving the emission remain hotly debated, the light curves of detected events show long-lived (
Externí odkaz:
http://arxiv.org/abs/2408.13314
Autor:
Wang, Z. -Y., Pastorello, A., Maeda, K., Reguitti, A., Cai, Y. -Z., Howell, D. Andrew, Benetti, S., Buckley, D., Cappellaro, E., Carini, R., Cartier, R., Chen, T. -W., Elias-Rosa, N., Fang, Q. -L., Gal-Yam, A., Gangopadhyay, A., Gromadzki, M., Gan, W. -P., Hiramatsu, D., Hu, M. -K., Inserra, C., McCully, C., Nicholl, M., Olivares, F. E., Pignata, G., Pineda-Garc'ia, J., Pursiainen, M., Ragosta, F., Rau, A., Roy, R., Sollerman, J., Tartaglia, L., Terreran, G., Valerin, G., Wang, Q., Wang, S. -Q., Young, D. R., Aryan, A., Bronikowski, M., Concepcion, E., Galbany, L., Lin, H., Melandri, A., Petrushevska, T., Ramirez, M., Shi, D. -D, Warwick, B., Zhang, J. -J., Wang, B., Wang, X. -F., Zhu, X. -J.
Publikováno v:
A&A 691, A156 (2024)
We present optical and near-infrared observations of two Type Ibn supernovae (SNe), SN 2018jmt and SN 2019cj. Their light curves have rise times of about 10 days, reaching an absolute peak magnitude of $M_g$(SN 2018jmt) = $-$19.07 $\pm$ 0.37 and $M_V
Externí odkaz:
http://arxiv.org/abs/2408.12393
Autor:
Bora, Zsófia, Könyves-Tóth, Réka, Vinkó, József, Bánhidi, Dominik, Bíró, Imre Barna, Bostroem, K. Azalee, Bódi, Attila, Burke, Jamison, Csányi, István, Cseh, Borbála, Farah, Joseph, Filippenko, Alexei V., Hegedűs, Tibor, Hiramatsu, Daichi, Horti-Dávid, Ágoston, Howell, D. Andrew, Jha, Saurabh W., Kalup, Csilla, Krezinger, Máté, Kriskovics, Levente, McCully, Curtis, Newsome, Megan, Ordasi, András, Gonzalez, Estefania Padilla, Pál, András, Pellegrino, Craig, Seli, Bálint, Sódor, Ádám, Szabó, Zsófia Marianna, Szabó, Norton O., Szakáts, Róbert, Szalai, Tamás, Székely, Péter, Terreran, Giacomo, Varga, Vázsony, Vida, Krisztián, Wang, Xiaofeng, Wheeler, J. Craig
The progenitor system(s) as well as the explosion mechanism(s) of thermonuclear (Type Ia) supernovae are long-standing issues in astrophysics. Here we present ejecta masses and other physical parameters for 28 recent Type Ia supernovae inferred from
Externí odkaz:
http://arxiv.org/abs/2408.11928
Autor:
Hsu, Brian, Smith, Nathan, Goldberg, Jared A., Bostroem, K. Azalee, Hosseinzadeh, Griffin, Sand, David J., Pearson, Jeniveve, Hiramatsu, Daichi, Andrews, Jennifer E., Beasor, Emma R., Dong, Yize, Farah, Joseph, Galbany, LluÍs, Gomez, Sebastian, Gonzalez, Estefania Padilla, Gutiérrez, Claudia P., Howell, D. Andrew, Könyves-Tóth, Réka, McCully, Curtis, Newsome, Megan, Shrestha, Manisha, Terreran, Giacomo, Villar, V. Ashley, Wang, Xiaofeng
We present and analyze the extensive optical broadband photometry of the Type II SN 2023ixf up to one year after explosion. We find that, when compared to two pre-existing model grids, the pseudo-bolometric light curve is consistent with drastically
Externí odkaz:
http://arxiv.org/abs/2408.07874