Strong Carbon Features and a Red Early Color in the Underluminous Type Ia SN 2022xkq

Autor: Pearson, Jeniveve, Sand, David J., Lundqvist, Peter, Galbany, Lluís, Andrews, Jennifer E., Bostroem, K. Azalee, Dong, Yize, Hoang, Emily, Hosseinzadeh, Griffin, Janzen, Daryl, Jencson, Jacob E., Lundquist, Michael J., Mehta, Darshana, Retamal, Nicolás Meza, Shrestha, Manisha, Valenti, Stefano, Wyatt, Samuel, Anderson, Joseph P., Ashall, Chris, Auchettl, Katie, Baron, Eddie, Blondin, Stéphane, Burns, Christopher R., Cai, Yongzhi, Chen, Ting-Wan, Chomiuk, Laura, Coulter, David A., Cross, Dane, Davis, Kyle W., de Jaeger, Thomas, DerKacy, James M., Desai, Dhvanil D., Dimitriadis, Georgios, Do, Aaron, Farah, Joseph R., Foley, Ryan J., Gromadzki, Mariusz, Gutiérrez, Claudia P., Haislip, Joshua, Hernández, Jonay I. González, Hinkle, Jason T., Hoogendam, Willem B., Howell, D. Andrew, Hoeflich, Peter, Hsiao, Eric, Huber, Mark E., Jha, Saurabh W., Palau, Cristina Jiménez, Kilpatrick, Charles D., Kouprianov, Vladimir, Kumar, Sahana, Kwok, Lindsey A., Larison, Conor, LeBaron, Natalie, Saux, Xavier Le, Lu, Jing, McCully, Curtis, Evans, Tycho Mera, Milne, Peter, Modjaz, Maryam, Morrell, Nidia, Müller-Bravo, Tomás E., Newsome, Megan, Nicholl, Matt, Gonzalez, Estefania Padilla, Payne, Anna V., Pellegrino, Craig, Phan, Kim, Pineda-García, Jonathan, Piro, Anthony L., Piscarreta, Lara, Polin, Abigail, Reichart, Daniel E., Rojas-Bravo, César, Ryder, Stuart D., Salmaso, Irene, Schwab, Michaela, Shahbandeh, Melissa, Shappee, Benjamin J., Siebert, Matthew R., Smith, Nathan, Strader, Jay, Taggart, Kirsty, Terreran, Giacomo, Tinyanont, Samaporn, Tucker, M. A., Valerin, Giorgio, Young, D. R.

We present optical, infrared, ultraviolet, and radio observations of SN 2022xkq, an underluminous fast-declining type Ia supernova (SN Ia) in NGC 1784 ($\mathrm{D}\approx31$ Mpc), from $<1$ to 180 days after explosion. The high-cadence observations o

Externí odkaz: http://arxiv.org/abs/2309.10054

Ground-based and JWST Observations of SN 2022pul: I. Unusual Signatures of Carbon, Oxygen, and Circumstellar Interaction in a Peculiar Type Ia Supernova

Autor: Siebert, Matthew R., Kwok, Lindsey A., Johansson, Joel, Jha, Saurabh W., Blondin, Stéphane, Dessart, Luc, Foley, Ryan J., Hillier, D. John, Larison, Conor, Pakmor, Rüdiger, Temim, Tea, Andrews, Jennifer E., Auchettl, Katie, Badenes, Carles, Barna, Barnabas, Bostroem, K. Azalee, Newman, Max J. Brenner, Brink, Thomas G., Bustamante-Rosell, María José, Camacho-Neves, Yssavo, Clocchiatti, Alejandro, Coulter, David A., Davis, Kyle W., Deckers, Maxime, Dimitriadis, Georgios, Dong, Yize, Farah, Joseph, Filippenko, Alexei V., Flörs, Andreas, Fox, Ori D., Garnavich, Peter, Gonzalez, Estefania Padilla, Graur, Or, Hambsch, Franz-Josef, Hosseinzadeh, Griffin, Howell, D. Andrew, Hughes, John P., Kerzendorf, Wolfgang E., Saux, Xavier K. Le, Maeda, Keiichi, Maguire, Kate, McCully, Curtis, Mihalenko, Cassidy, Newsome, Megan, O'Brien, John T., Pearson, Jeniveve, Pellegrino, Craig, Pierel, Justin D. R., Polin, Abigail, Rest, Armin, Rojas-Bravo, César, Sand, David J., Schwab, Michaela, Shahbandeh, Melissa, Shrestha, Manisha, Smith, Nathan, Strolger, Louis-Gregory, Szalai, Tamás, Taggart, Kirsty, Terreran, Giacomo, Terwel, Jacco H., Tinyanont, Samaporn, Valenti, Stefano, Vinkó, József, Wheeler, J. Craig, Yang, Yi, Zheng, Weikang, Ashall, Chris, Derkacy, James M., Galbany, Lluís, Hoeflich, Peter, Hsiao, Eric, De Jaeger, Thomas, Lu, Jing, Maund, Justyn, Medler, Kyle, Morrell, Nidia, Shappee, Benjamin J., Stritzinger, Maximilian, Suntzeff, Nicholas, Tucker, Michael, Wang, Lifan

Nebular-phase observations of peculiar Type Ia supernovae (SNe Ia) provide important constraints on progenitor scenarios and explosion dynamics for both these rare SNe and the more common, cosmologically useful SNe Ia. We present observations from an

Externí odkaz: http://arxiv.org/abs/2308.12449

A Search for Technosignatures Around 11,680 Stars with the Green Bank Telescope at 1.15-1.73 GHz

Autor: Margot, Jean-Luc, Li, Megan G., Pinchuk, Pavlo, Myhrvold, Nathan, Lesyna, Larry, Alcantara, Lea E., Andrakin, Megan T., Arunseangroj, Jeth, Baclet, Damien S., Belk, Madison H., Bhadha, Zerxes R., Brandis, Nicholas W., Carey, Robert E., Cassar, Harrison P., Chava, Sai S., Chen, Calvin, Chen, James, Cheng, Kellen T., Cimbri, Alessia, Cloutier, Benjamin, Combitsis, Jordan A., Couvrette, Kelly L., Coy, Brandon P., Davis, Kyle W., Delcayre, Antoine F., Du, Michelle R., Feil, Sarah E., Fu, Danning, Gilmore, Travis J., Grahill-Bland, Emery, Iglesias, Laura M., Juneau, Zoe, Karapetian, Anthony G., Karfakis, George, Lambert, Christopher T., Lazbin, Eric A., Li, Jian H., Zhuofu, Li, Liskij, Nicholas M., Lopilato, Anthony V., Lu, Darren J., Ma, Detao, Mathur, Vedant, Minasyan, Mary H., Muller, Maxwell K., Nasielski, Mark T., Nguyen, Janice T., Nicholson, Lorraine M., Niemoeller, Samantha, Ohri, Divij, Padhye, Atharva U., Penmetcha, Supreethi V., Prakash, Yugantar, Xinyi, Qi, Rindt, Liam, Sahu, Vedant, Scally, Joshua A., Scott, Zefyr, Seddon, Trevor J., Shohet, Lara-Lynn V., Sinha, Anchal, Sinigiani, Anthony E., Song, Jiuxu, Stice, Spencer M., Uplisashvili, Andria, Vanga, Krishna, Vazquez, Amaury G., Vetushko, George, Villa, Valeria, Vincent, Maria, Waasdorp, Ian J., Wagaman, Ian B., Wang, Amanda, Wight, Jade C., Wong, Ella, Yamaguchi, Natsuko, Zhang, Zijin, Zhao, Junyang, Lynch, Ryan S.

Publikováno v: AJ 166 206 (2023)

We conducted a search for narrowband radio signals over four observing sessions in 2020-2023 with the L-band receiver (1.15-1.73 GHz) of the 100 m diameter Green Bank Telescope. We pointed the telescope in the directions of 62 TESS Objects of Interes

Externí odkaz: http://arxiv.org/abs/2308.02712

A Low-Mass Helium Star Progenitor Model for the Type Ibn SN 2020nxt

Autor: Wang, Qinan, Goel, Anika, Dessart, Luc, Fox, Ori D., Shahbandeh, Melissa, Rest, Sofia, Rest, Armin, Groh, Jose H., Allan, Andrew, Fransson, Claes, Smith, Nathan, Hosseinzadeh, Griffin, Filippenko, Alexei V., Andrews, Jennifer, Bostroem, K. Azalee, Brink, Thomas G., Brown, Peter, Burke, Jamison, Chevalier, Roger, Clayton, Geoffrey C., Dai, Mi, Davis, Kyle W., Foley, Ryan J., Gomez, Sebastian, Harris, Chelsea, Hiramatsu, Daichi, Howell, D. Andrew, Jennings, Connor, Jha, Saurabh W., Kasliwal, Mansi M., Kelly, Patrick L., Kool, Erik C., Liu, Evelyn, Ma, Emily, McCully, Curtis, Miller, Adam M., Murakami, Yukei, Pellegrino, Craig, Gonzalez, Estefania Padilla, Perera, Derek, Pierel, Justin, Rojas-Bravo, César, Siebert, Matthew R., Sollerman, Jesper, Szalai, Tamás, Tinyanont, Samaporn, Van Dyk, Schuyler D., Zheng, WeiKang, Chambers, Kenneth C., Coulter, David A., de Boer, Thomas, Earl, Nicholas, Farias, Diego, Gall, Christa, McGill, Peter, Ransome, Conor L., Taggart, Kirsty, Villar, V. Ashley

A growing number of supernovae (SNe) are now known to exhibit evidence for significant interaction with a dense, pre-existing, circumstellar medium (CSM). SNe Ibn comprise one such class that can be characterised by both rapidly evolving light curves

Externí odkaz: http://arxiv.org/abs/2305.05015

Supernova 2020wnt: An Atypical Superluminous Supernova with a Hidden Central Engine

Autor: Tinyanont, Samaporn, Woosley, Stan E., Taggart, Kirsty, Foley, Ryan J., Yan, Lin, Lunnan, Ragnhild, Davis, Kyle W., Kilpatrick, Charles D., Siebert, Matthew R., Schulze, Steve, Ashall, Chris, Chen, Ting-Wan, De, Kishalay, Dimitriadis, Georgios, Dong, Dillon Z., Fremling, Christoffer, Gagliano, Alexander, Jha, Saurabh W., Jones, David O., Kasliwal, Mansi M., Miao, Hao-Yu, Pan, Yen-Chen, Perley, Daniel A., Ravi, Vikram, Rojas-Bravo, César, Sfaradi, Itai, Sollerman, Jesper, Alarcon, Vanessa, Angulo, Rodrigo, Clever, Karoli E., Crawford, Payton, Couch, Cirilla, Dandu, Srujan, Dhara, Atirath, Johnson, Jessica, Lai, Zhisen, Smith, Carli

We present observations of a peculiar hydrogen- and helium-poor stripped-envelope (SE) supernova (SN) 2020wnt, primarily in the optical and near-infrared (near-IR). Its peak absolute bolometric magnitude of -20.9 mag and a rise time of 69~days are re

Externí odkaz: http://arxiv.org/abs/2212.00177