Results 1 to 10 of about 1,899,768 (248)

Persistent Radio Emission from Synchrotron Heating by a Repeating Fast Radio Burst Source in a Nebula [PDF]

Astrophysical Journal, 2020
The first repeating fast radio burst (FRB), FRB 121102, was found to be associated with a spatially coincident, persistent nonthermal radio source, but the origin of the persistent emission remains unknown. In this paper, we propose that the persistent emission is produced via synchrotron-heating process by multiple bursts of FRB 121102 in a self ...
Qiao-Chu Li, Yuanpei Yang, Z. Dai
arxiv   +3 more sources

The Antares emission nebula and mass loss of alpha Sco A [PDF]

, 2008
The Antares nebula is a peculiar emission nebula seen in numerous Fe II lines and in radio free-free emission, probably associated with the H II region caused by alpha Sco B in the wind of alpha Sco A. High-resolution spectra with spatial resolution were used to study the emission line spectrum, the physical nature of the nebula and to determine the ...
D. Reimers, H. Hagen, R. Baade, K. Braun
arxiv   +3 more sources

High velocity structures in, and the X-ray emission from the LBV nebula around Eta Carinae [PDF]

, 2000
The Luminous Blue Variable star Eta Carinae is one of the most massive stars known. It underwent a giant eruption in 1843 in which the Homunculus nebula was created. ROSAT and ASCA data indicate the existence of a hard and a soft X-ray component which appear to be spatially distinct: a softer diffuse shell of the nebula around Eta Carinae and a harder ...
K. Weis, W. J. Duschl, D. J. Bomans
arxiv   +3 more sources

Deep Optical Images of the Ejecta Nebula around the Wolf–Rayet Star WR 8 (HD 62910) [PDF]

The Astronomical Journal
We report the results of deep H α and [O iii ] images of the bright WN6/WC4 Wolf–Rayet (WR) star WR 8 (HD 62910). These data show considerably more surrounding nebulosity than seen in prior imaging. The brighter portions of the nebula span $\simeq {6}^{{\
Robert A. Fesen, Daniel Patnaude, Wei-Hao Wang, You-Hua Chu, Jason Sun, Manuel C. Peitsch, Martin Pugh, Scott Garrod, Michael Selby, Alex Woronow   +9 more
doaj   +2 more sources

A PAN-CARINA YOUNG STELLAR OBJECT CATALOG: INTERMEDIATE-MASS YOUNG STELLAR OBJECTS IN THE CARINA NEBULA IDENTIFIED VIA MID-INFRARED EXCESS EMISSION [PDF]

, 2011
We present a catalog of 1439 young stellar objects (YSOs) spanning the 1.42 deg2 field surveyed by the Chandra Carina Complex Project (CCCP), which includes the major ionizing clusters and the most active sites of ongoing star formation within the Great ...
Matthew S. Povich, Nathan Smith, Steven R. Majewski, Konstantin V. Getman, Leisa K. Townsley, B. Babler, Patrick S. Broos, R. Indebetouw, M. R. Meade, Thomas Robitaille, Keivan G. Stassun, B. A. Whitney, Yoshinori Yonekura, Y. Fukui   +13 more
openalex   +3 more sources

On the variability of the GeV and multi-TeV gamma-ray emission from the Crab nebula [PDF]

, 2011
Recently, the AGILE γ -ray telescope has reported enhanced γ -ray emission above 100 MeV from the direction of the Crab nebula during a period of a few days. This intriguing observation has been confirmed by the Fermi Large Area Telescope (LAT).
W. Bednarek, W. Idec
openalex   +3 more sources

Peta–electron volt gamma-ray emission from the Crab Nebula [PDF]

Science, 2021
High-energy photons from the Crab Nebula The Crab Nebula contains a pulsar that excites the surrounding gas to emit high-energy radiation. The combination of the pulsar's youth and nearby location makes the nebula the brightest gamma-ray source in the ...
Z. Cao, F. Aharonian, Q. An, Axikegu, L. Bai, Y. Bai, Y. Bao, D. Bastieri, X. Bi, Y. Bi, H. Cai, J. Cai, Z. Cao, J. Chang, J. Chang, B. Chen, E. Chen, J. Chen, Liang Chen, Long Chen, M. Chen, M. Chen, Q. Chen, S. Chen, S. Z. Chen, T. Chen, X. L. Chen, Y. Chen, N. Cheng, Y. Cheng, S. Cui, X. Cui, Y. Cui, B. D’Ettorre Piazzoli, B. Dai, H. Dai, Z. Dai, Danzengluobu, D. Della Volpe, X. Dong, K. Duan, J. Fan, Y. Fan, Z. Fan, J. Fang, K. Fang, C. Feng, L. Feng, S. Feng, Y. Feng, B. Gao, C. Gao, L. Gao, Q. Gao, W. Gao, M. Ge, L. Geng, G. Gong, Q. Gou, M. Gu, F. Guo, J. G. Guo, X. Guo, Y. Guo, Y. Guo, Y. Han, H. He, H. He, J. He, S. He, X. He, Y. He, M. Heller, Y. Hor, C. Hou, X. Hou, H. Hu, S. Hu, S. Hu, X. Hu, D. Huang, Q. Huang, W. Huang, X. Huang, X. Y. Huang, Z. Huang, F. Ji, X. Ji, H. Jia, K. Jiang, Z. Jiang, C. Jin, T. Ke, D. Kuleshov, K. Levochkin, B. Li, Cheng Li, Cong Li, F. Li, H. Li, H. C. Li, H. Li, Jian Li, Jie Li, K. Li, W. Li, X. Li, Xin Li, Y. Li, Y. Li, Zhe Li, Zhuo Li, E. Liang, Y. Liang, S. Lin, B. Liu, C. Liu, D. Liu, H. Liu, H. Liu, J. Liu, J. Liu, J. Liu, J. Liu, M. Liu, R. Liu, S. M. Liu, W. Liu, Y. Liu, Y. Liu, Z. Liu, W. Long, R. Lu, H. Lv, B. Ma, Li Ma, X. Ma, J. Mao, A. Masood, Z. Min, W. Mitthumsiri, T. Montaruli, Y. Nan, B. Pang, P. Pattarakijwanich, Z. Pei, M. Qi, Ye Qi, B. Qiao, J. Qin, D. Ruffolo, V. Rulev, Alejandro Sáiz, L. Shao, O. Shchegolev, X. Sheng, J. Shi, H. Song, Y. Stenkin, V. Stepanov, Y. Su, Q. N. Sun, X. Sun, Z. Sun, P. Tam, Z. Tang, W. Tian, B. Wang, C. Wang, H. Wang, H. Wang, J. Wang, J. Wang, L. Wang, L. Wang, R. Wang, W. Wang, X. Wang, X. J. Wang, X. Y. Wang, Y. Wang, Y. Wang, Y. J. Wang, Y. Wang, Z. Wang, Z. Wang, Zhen Wang, Z. Wang, D. Wei, J. Wei, Y. J. Wei, T. Wen, C. Y. Wu, H. Wu, S. Wu, W. X. Wu, X. Wu, S. Xi, J. Xia, J. Xia, G. Xiang, D. Xiao, G. Xiao, H. B. Xiao, G. Xin, Y. Xin, Y. Xing, D. Xu, R. Xu, L. Xue, D. Yan, J. Yan, C. Yang, F. Yang, J. Yang, L. L. Yang, M. Yang, R. Yang, S. Yang, Y. Yao, Z. Yao, Y. Ye, L. Yin, N. Yin, X. You, Z. You, Y. Yu, Q. Yuan, H. Zeng, T. Zeng, W. Zeng, Z. Zeng, M. Zha, X. Zhai, B. Zhang, H. Zhang, H. Zhang, J. Zhang, J. Zhang, L. X. Zhang, Li Zhang, Lun Zhang, P. Zhang, P. Zhang, R. Zhang, S. Zhang, S. Zhang, X. Zhang, X. Zhang, Y. Zhang, Y. Zhang, Yi. Zhang, Yong Zhang, B. Zhao, J. Zhao, L. Zhao, L. Zhao, S. Zhao, F. Zheng, Y. Zheng, B. Zhou, H. Zhou, J. Zhou, P. Zhou, R. Zhou, X. Zhou, C. Zhu, F. Zhu, H. Zhu, K. Zhu, X. Zuo   +270 more
semanticscholar   +1 more source

PeV Emission of the Crab Nebula: Constraints on the Proton Content in Pulsar Wind and Implications [PDF]

Astrophysical Journal, 2021
Recently, two photons from the Crab Nebula with energy of approximately 1 PeV were detected by the Large High Altitude Air Shower Observatory (LHAASO), opening an ultrahigh-energy window for studying pulsar wind nebulae (PWNe).
Ruo-Yu Liu, Xiang-Yu Wang
semanticscholar   +1 more source

Vela pulsar wind nebula X-rays are polarized to near the synchrotron limit. [PDF]

Nature, 2022
Pulsar wind nebulae are formed when outflows of relativistic electrons and positrons hit the surrounding supernova remnant or interstellar medium at a shock front.
F. Xie, A. Di Marco, F. La Monaca, Kuan Liu, F. Muleri, N. Bucciantini, R. Romani, E. Costa, J. Rankin, P. Soffitta, M. Bachetti, N. Di Lalla, S. Fabiani, R. Ferrazzoli, S. Gunji, L. Latronico, M. Negro, N. Omodei, M. Pilia, A. Trois, E. Watanabe, I. Agudo, L. A. Antonelli, L. Baldini, W. Baumgartner, R. Bellazzini, S. Bianchi, S. Bongiorno, R. Bonino, A. Brez, F. Capitanio, S. Castellano, E. Cavazzuti, S. Ciprini, A. De Rosa, E. Del Monte, L. Di Gesu, I. Donnarumma, Victor Doroshenko, M. Dovčiak, S. Ehlert, T. Enoto, Y. Evangelista, Javier A. García, K. Hayashida, J. Heyl, W. Iwakiri, S. Jorstad, V. Karas, T. Kitaguchi, J. Kolodziejczak, H. Krawczynski, I. Liodakis, S. Maldera, A. Manfreda, F. Marin, A. Marinucci, A. Marscher, H. Marshall, F. Massaro, G. Matt, I. Mitsuishi, T. Mizuno, C. Ng, S. O’Dell, C. Oppedisano, A. Papitto, G. Pavlov, A. L. Peirson, M. Perri, M. Pesce-Rollins, P. Petrucci, A. Possenti, J. Poutanen, S. Puccetti, B. Ramsey, A. Ratheesh, C. Sgro’, P. Slane, G. Spandre, T. Tamagawa, F. Tavecchio, R. Taverna, Y. Tawara, A. Tennant, N. Thomas, F. Tombesi, S. Tsygankov, R. Turolla, J. Vink, M. Weisskopf, Kinwah Wu, S. Zane   +92 more
semanticscholar   +1 more source

Simultaneous space and phase resolved X-ray polarimetry of the Crab pulsar and nebula [PDF]

Nature Astronomy, 2022
X-ray polarization measurements of the Crab nebula and pulsar by the IXPE satellite reveal a global toroidal magnetic field with large variations in local polarization, suggesting a more complex turbulence distribution than anticipated.
N. Bucciantini, R. Ferrazzoli, M. Bachetti, J. Rankin, N. Di Lalla, C. Sgro’, N. Omodei, T. Kitaguchi, T. Mizuno, S. Gunji, E. Watanabe, L. Baldini, P. Slane, M. Weisskopf, R. Romani, A. Possenti, H. Marshall, S. Silvestri, L. Pacciani, M. Negro, F. Muleri, E. de Oña Wilhelmi, F. Xie, J. Heyl, M. Pesce-Rollins, Josephine Wong, M. Pilia, I. Agudo, L. A. Antonelli, W. Baumgartner, R. Bellazzini, S. Bianchi, S. Bongiorno, R. Bonino, A. Brez, F. Capitanio, S. Castellano, E. Cavazzuti, Chien-Ting J. Chen, S. Ciprini, E. Costa, A. De Rosa, E. Del Monte, L. Di Gesu, A. Di Marco, I. Donnarumma, Victor Doroshenko, M. Dovčiak, S. Ehlert, T. Enoto, Y. Evangelista, S. Fabiani, Javier A. García, K. Hayashida, W. Iwakiri, S. Jorstad, P. Kaaret, V. Karas, F. Kislat, J. Kolodziejczak, H. Krawczynski, F. La Monaca, L. Latronico, I. Liodakis, S. Maldera, A. Manfreda, F. Marin, A. Marinucci, A. Marscher, F. Massaro, G. Matt, I. Mitsuishi, C. Ng, S. O’Dell, C. Oppedisano, A. Papitto, G. Pavlov, A. L. Peirson, M. Perri, P. Petrucci, J. Poutanen, S. Puccetti, B. Ramsey, A. Ratheesh, O. Roberts, P. Soffitta, G. Spandre, D. Swartz, T. Tamagawa, F. Tavecchio, R. Taverna, Y. Tawara, A. Tennant, N. Thomas, F. Tombesi, A. Trois, S. Tsygankov, R. Turolla, J. Vink, Kinwah Wu, S. Zane   +100 more
semanticscholar   +1 more source