Zobrazeno 1 - 10
of 456
pro vyhledávání: '"Hosseinzadeh G"'
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:
Jacobson-Galán, W. V., Dessart, L., Davis, K. W., Kilpatrick, C. D., Margutti, R., Foley, R. J., Chornock, R., Terreran, G., Hiramatsu, D., Newsome, M., Gonzalez, E. Padilla, Pellegrino, C., Howell, D. A., Filippenko, A. V., Anderson, J. P., Angus, C. R., Auchettl, K., Bostroem, K. A., Brink, T. G., Cartier, R., Coulter, D. A., de Boer, T., Drout, M. R., Earl, N., Ertini, K., Farah, J. R., Farias, D., Gall, C., Gao, H., Gerlach, M. A., Guo, F., Haynie, A., Hosseinzadeh, G., Ibik, A. L., Jha, S. W., Jones, D. O., Langeroodi, D., LeBaron, N, Magnier, E. A., Piro, A. L., Raimundo, S. I., Rest, A., Rest, S., Rich, R. Michael, Rojas-Bravo, C., Sears, H., Taggart, K., Villar, V. A., Wainscoat, R. J., Wang, X-F., Wasserman, A. R., Yan, S., Yang, Y., Zhang, J., Zheng, W.
We present ultraviolet/optical/near-infrared observations and modeling of Type II supernovae (SNe II) whose early-time ($\delta t < 2$ days) spectra show transient, narrow emission lines from shock ionization of confined ($r < 10^{15}$ cm) circumstel
Externí odkaz:
http://arxiv.org/abs/2403.02382
Autor:
Gonzalez, E. Padilla, Howell, D. A., Terreran, G., McCully, C., Newsome, M., Burke, J., Farah, J., Pellegrino, C., Bostroem, K. A., Hosseinzadeh, G., Pearson, J., Sand, D. J., Shrestha, M., Smith, N., Dong, Y., Retamal, N. Meza, Valenti, S., Boos, S., Shen, K. J., Townsley, D., Galbany, L., Piscarreta, L., Foley, R. J., Bustamante-Rosell, M. J., Coulter, D. A., Chornock, R., Davis, K. W., Dickinson, C. B., Jones, D. O., Kutcka, J., Saux, X. K. Le, Rojas-Bravo, C. R., Taggart, K., Tinyanont, S., Yang, G., Jha, S. W., Margutti, R.
We present photometric and spectroscopic data for SN 2022joj, a nearby peculiar Type Ia supernova (SN Ia) with a fast decline rate ($\rm{\Delta m_{15,B}=1.4}$ mag). SN 2022joj shows exceedingly red colors, with a value of approximately ${B-V \approx
Externí odkaz:
http://arxiv.org/abs/2308.06334
Autor:
Graur, O., Gonzalez, E. Padilla, Burke, J., Deckers, M., Jha, S. W., Galbany, L., Karamenhmetoglu, E., Stritzinger, M. D., Maguire, K., Howell, D. A., Fisher, R., Fullard, A. G., Handberg, R., Hiramatsu, D., Hosseinzadeh, G., Kerzendorf, W. E., McCully, C., Newsome, M., Pellegrino, C., Rest, A., Riess, A. G., Seitenzahl, I. R., Shara, M. M., Shen, K. J., Terreran, G., Zurek, D. R.
Near-infrared (NIR) observations of normal Type Ia supernovae (SNe Ia) obtained between 150 to 500 d past maximum light reveal the existence of an extended plateau. Here, we present observations of the underluminous, 1991bg-like SN 2021qvv. Early, gr
Externí odkaz:
http://arxiv.org/abs/2306.12858
Autor:
Ailawadhi, B., Dastidar, R., Misra, K., Roy, R., Hiramatsu, D., Howell, D. A., Brink, T. G., Zheng, W., Galbany, L., Shahbandeh, M., Arcavi, I., Ashall, C., Bostroem, K. A., Burke, J., Chapman, T., Dimple, Filippenko, A. V., Gangopadhyay, A., Ghosh, A., Hoffman, A. M., Hosseinzadeh, G., Jennings, C., Jha, V. K., Kumar, A., Karamehmetoglu, E., McCully, C., McGinness, E., Müller-Bravo, T. E., Murakami, Y. S., Pandey, S. B., Pellegrino, C., Piscarreta, L., Rho, J., Stritzinger, M., Sunseri, J., Van Dyk, S. D., Yadav, L.
We present high-cadence photometric and spectroscopic observations of SN~2020jfo in ultraviolet and optical/near-infrared bands starting from $\sim 3$ to $\sim 434$ days after the explosion, including the earliest data with the 10.4\,m GTC. SN~2020jf
Externí odkaz:
http://arxiv.org/abs/2211.02823
The early lightcurves of Type Ia supernovae (SNe Ia) can be used to test predictions about their progenitor systems. If the progenitor system consists of a single white dwarf in a binary with a Roche-lobe-overflowing non-degenerate stellar companion,
Externí odkaz:
http://arxiv.org/abs/2208.11201
Autor:
Burke, J., Howell, D. A., Sand, D. J., Amaro, R. C., Brown, P. J., Andrews, J. E., Bostroem, K. A., Dong, Y., Haislip, J., Hiramatsu, D., Hosseinzadeh, G., Kouprianov, V., Lundquist, M. J., McCully, C., Pellegrino, C., Reichart, D., Tartaglia, L., Valenti, S., Yang, S.
If Type Ia supernovae (SNe~Ia) result from a white dwarf being ignited by Roche lobe overflow from a nondegenerate companion, then as the supernova explosion runs into the companion star its ejecta will be shocked, causing an early blue excess in the
Externí odkaz:
http://arxiv.org/abs/2207.07681
Autor:
Pellegrino, C., Howell, D. A., Terreran, G., Arcavi, I., Bostroem, K. A., Brown, P. J., Burke, J., Dong, Y., Gilkis, A., Hiramatsu, D., Hosseinzadeh, G., McCully, C., Modjaz, M., Newsome, M., Gonzalez, E. Padilla, Pritchard, T. A., Sand, D. J., Valenti, S., Williamson, M.
Publikováno v:
The Astrophysical Journal, Volume 938, page 73, 2020
We present a sample of Type Icn supernovae (SNe Icn), a newly-discovered class of transients characterized by their interaction with H- and He-poor circumstellar material (CSM). This sample is the largest collection of SNe Icn to date and includes ob
Externí odkaz:
http://arxiv.org/abs/2205.07894
Autor:
Graham, M. L., Kennedy, T. D., Kumar, S., Amaro, R. C., Sand, D. J., Jha, S. W., Galbany, L., Vinko, J., Wheeler, J. C., Hsiao, E. Y., Bostroem, K. A., Burke, J., Hiramatsu, D., Hosseinzadeh, G., McCully, C., Howell, D. A., Diamond, T., Hoeflich, P., Wang, X., Li, W.
The observed diversity in Type Ia supernovae (SNe Ia) -- the thermonuclear explosions of carbon-oxygen white dwarf stars used as cosmological standard candles -- is currently met with a variety of explosion models and progenitor scenarios. To help im
Externí odkaz:
http://arxiv.org/abs/2201.07864
Autor:
Rastinejad, J., Paterson, K., Fong, W., Sand, D. J., Lundquist, M. J., Hosseinzadeh, G., Christensen, E., Daly, P. N., Gibbs, A. R., Hall, S., Shelly, F., Yang, S.
We present a comprehensive analysis of 653 optical candidate counterparts reported during the third gravitational wave (GW) observing run. Our sample concentrates on candidates from the 15 events (published in GWTC-2, GWTC-3 or not retracted on Grace
Externí odkaz:
http://arxiv.org/abs/2112.09701