Zobrazeno 1 - 10
of 1 616
pro vyhledávání: '"red supergiant"'
Autor:
K. Azalee Bostroem, David J. Sand, Luc Dessart, Nathan Smith, Saurabh W. Jha, Stefano Valenti, Jennifer E. Andrews, Yize Dong, Alexei V. Filippenko, Sebastian Gomez, Daichi Hiramatsu, Emily T. Hoang, Griffin Hosseinzadeh, D. Andrew Howell, Jacob E. Jencson, Michael Lundquist, Curtis McCully, Darshana Mehta, Nicolas E. Meza-Retamal, Jeniveve Pearson, Aravind P. Ravi, Manisha Shrestha, Samuel Wyatt
Publikováno v:
The Astrophysical Journal Letters, Vol 973, Iss 2, p L47 (2024)
SN 2023ixf was discovered in M101 within a day of the explosion and rapidly classified as a Type II supernova with flash features. Here we present ultraviolet (UV) spectra obtained with the Hubble Space Telescope 14, 19, 24, and 66 days after the exp
Externí odkaz:
https://doaj.org/article/f3b9755459b4494f932fd334e1777bde
Autor:
Manisha Shrestha, K. Azalee Bostroem, David J. Sand, Griffin Hosseinzadeh, Jennifer E. Andrews, Yize Dong, Emily Hoang, Daryl Janzen, Jeniveve Pearson, Jacob E. Jencson, M. J. Lundquist, Darshana Mehta, Aravind P. Ravi, Nicolás Meza Retamal, Stefano Valenti, Peter J. Brown, Saurabh W. Jha, Colin Macrie, Brian Hsu, Joseph Farah, D. Andrew Howell, Curtis McCully, Megan Newsome, Estefania Padilla Gonzalez, Craig Pellegrino, Giacomo Terreran, Lindsey Kwok, Nathan Smith, Michaela Schwab, Aidan Martas, Ricardo R. Munoz, Gustavo E. Medina, Ting S. Li, Paula Diaz, Daichi Hiramatsu, Brad E. Tucker, J. C. Wheeler, Xiaofeng Wang, Qian Zhai, Jujia Zhang, Anjasha Gangopadhyay, Yi Yang, Claudia P. Gutiérrez
Publikováno v:
The Astrophysical Journal Letters, Vol 972, Iss 1, p L15 (2024)
We present high-cadence photometric and spectroscopic observations of supernova (SN) 2024ggi, a Type II SN with flash spectroscopy features, which exploded in the nearby galaxy NGC 3621 at ∼7 Mpc. The light-curve evolution over the first 30 hr can
Externí odkaz:
https://doaj.org/article/f290b6808d1147dfa751e93bc8675b61
Autor:
Xinlei Chen, Brajesh Kumar, Xinzhong Er, Helong Guo, Yuan-Pei Yang, Weikang Lin, Yuan Fang, Guowang Du, Chenxu Liu, Jiewei Zhao, Tianyu Zhang, Yuxi Bao, Xingzhu Zou, Yu Pan, Yu Wang, Xufeng Zhu, Kaushik Chatterjee, Xiangkun Liu, Dezi Liu, Edoardo P. Lagioia, Geeta Rangwal, Shiyan Zhong, Jinghua Zhang, Jianhui Lian, Yongzhi Cai, Yangwei Zhang, Xiaowei Liu
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 1, p L2 (2024)
We present early-phase good-cadence (hour-to-day) simultaneous multiband ( ugi and vrz bands) imaging of the nearby supernova SN 2024ggi, which exploded in the nearby galaxy NGC 3621. A quick follow-up was conducted within less than a day after the e
Externí odkaz:
https://doaj.org/article/9e758fda25914355a1a05a30446d5b0f
Autor:
Danfeng Xiang, Jun Mo, Xiaofeng Wang, Lingzhi Wang, Jujia Zhang, Han Lin, Liyang Chen, Cuiying Song, Liang-Duan Liu, Zhenyu Wang, Gaici Li
Publikováno v:
The Astrophysical Journal Letters, Vol 969, Iss 1, p L15 (2024)
We present a detailed analysis of the progenitor and its local environment for the recently discovered Type II supernova (SN) 2024ggi at a distance of about 6.7 Mpc, by utilizing the pre-explosion images from the Hubble Space Telescope and Spitzer Sp
Externí odkaz:
https://doaj.org/article/9347ae819d774f60a10c402bc8d918ef
Publikováno v:
The Astrophysical Journal Letters, Vol 966, Iss 1, p L13 (2024)
Emission lines from Rydberg transitions are detected for the first time from a region close to the surface of Betelgeuse. The H30 α line is observed at 231.905 GHz, with an FWHM ∼42 km s ^−1 and extended wings. A second line at 232.025 GHz (FWHM
Externí odkaz:
https://doaj.org/article/53e739192a9e411091b56125df0cc484
Publikováno v:
The Astrophysical Journal Letters, Vol 964, Iss 2, p L27 (2024)
The apparent tension between the luminosity functions of red supergiant (RSG) stars and of RSG progenitors of Type II supernovae (SNe) is often referred to as the RSG problem and it motivated some to suggest that many RSGs end their life without an S
Externí odkaz:
https://doaj.org/article/222fbe3400e941deac0ad0b2dba33359
Autor:
Jing-Ze Ma, Andrea Chiavassa, Selma E. de Mink, Ruggero Valli, Stephen Justham, Bernd Freytag
Publikováno v:
The Astrophysical Journal Letters, Vol 962, Iss 2, p L36 (2024)
The evolved stages of massive stars are poorly understood, but invaluable constraints can be derived from spatially resolved observations of nearby red supergiants, such as Betelgeuse. Atacama Large Millimeter/submillimeter Array (ALMA) observations
Externí odkaz:
https://doaj.org/article/a33409e794554e5ab0e8c21ffc6e19c4
Publikováno v:
The Astrophysical Journal, Vol 977, Iss 1, p 35 (2024)
We predict the existence of α Ori B, a low-mass companion orbiting Betelgeuse. This is motivated by the presence of a 2170 day long secondary period (LSP) in Betelgeuse’s lightcurve, a periodicity that is ≈5 times longer than the star’s 416 da
Externí odkaz:
https://doaj.org/article/e4b4a2ea8b074be99e5b004008503755
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 275, Iss 2, p 33 (2024)
Asymptotic giant branch stars (AGBs) and red supergiant stars (RSGs) exhibit significant mass-loss phenomena and are considered important sources of interstellar dust. In this work, we employed a uniform method of spectral energy distribution fitting
Externí odkaz:
https://doaj.org/article/7aa17a8be1424d78ad0a4efe504c256e
Autor:
Avinash Singh, Rishabh Singh Teja, Takashi J. Moriya, Keiichi Maeda, Koji S Kawabata, Masaomi Tanaka, Ryo Imazawa, Tatsuya Nakaoka, Anjasha Gangopadhyay, Masayuki Yamanaka, Vishwajeet Swain, D. K. Sahu, G. C. Anupama, Brajesh Kumar, Ramya M. Anche, Yasuo Sano, A. Raj, V. K. Agnihotri, Varun Bhalerao, D. Bisht, M. S. Bisht, K. Belwal, S. K. Chakrabarti, Mitsugu Fujii, Takahiro Nagayama, Katsura Matsumoto, Taisei Hamada, Miho Kawabata, Amit Kumar, Ravi Kumar, Brian K. Malkan, Paul Smith, Yuta Sakagami, Kenta Taguchi, Nozomu Tominaga, Arata Watanabe
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 132 (2024)
We present a detailed investigation of photometric, spectroscopic, and polarimetric observations of the Type II SN 2023ixf. Earlier studies have provided compelling evidence for a delayed shock breakout from a confined dense circumstellar matter (CSM
Externí odkaz:
https://doaj.org/article/1d1aaeee19fd481f8123537eeef70a37