Zobrazeno 1 - 10
of 218
pro vyhledávání: '"Paulo C C Freire"'
Autor:
Paulo C. C. Freire, Norbert Wex
Publikováno v:
Living Reviews in Relativity, Vol 27, Iss 1, Pp 1-86 (2024)
Abstract The discovery of the first pulsar in a binary star system, the Hulse–Taylor pulsar, 50 years ago opened up an entirely new field of experimental gravity. For the first time it was possible to investigate strong-field and radiative aspects
Externí odkaz:
https://doaj.org/article/4c498aecb1284bdd8f3f46d84526c000
Autor:
Yuxiao Wu, Zhichen Pan, Lei Qian, Scott M. Ransom, Ralph P. Eatough, BoJun Wang, Paulo C. C. Freire, Kuo Liu, Zhen Yan, Jintao Luo, Liyun Zhang, Minghui Li, Dejiang Yin, Baoda Li, Yifeng Li, Yinfeng Dai, Yaowei Li, Xinnan Zhang, Tong Liu, Yu Pan
Publikováno v:
The Astrophysical Journal Letters, Vol 974, Iss 2, p L23 (2024)
We present the discovery of three pulsars in the globular cluster (GC) M15 (NGC 7078) by the Five-hundred-meter Aperture Spherical Radio Telescope. PSR J2129+1210J (M15J) is a millisecond pulsar with a spin period of 11.84 ms and a dispersion measure
Externí odkaz:
https://doaj.org/article/72230bd637174a5499cad0c36b04cec0
Autor:
Huanchen Hu, Paulo C. C. Freire
Publikováno v:
Universe, Vol 10, Iss 4, p 160 (2024)
Neutron stars (NSs) are compact objects that host the densest forms of matter in the observable universe, providing unique opportunities to study the behaviour of matter at extreme densities. While precision measurements of NS masses through pulsar t
Externí odkaz:
https://doaj.org/article/b4519715116049058ac6ea6d8d446dae
Autor:
Amaris V. McCarver, Thomas J. Maccarone, Scott M. Ransom, Tracy E. Clarke, Simona Giacintucci, Wendy M. Peters, Emil Polisensky, Kristina Nyland, Tasha Gautam, Paulo C. C. Freire, Blagoy Rangelov
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 1, p 30 (2024)
We present results from a search for pulsars in globular clusters, including the discovery of a new millisecond pulsar in the stellar cluster GLIMPSE-C01. We searched for low-frequency radio sources within 97 globular clusters using images from the V
Externí odkaz:
https://doaj.org/article/baeebdaa4a694a6f994b8e13c0d1abaa
Autor:
Lingqi Meng, Weiwei Zhu, Michael Kramer, Xueli Miao, Gregory Desvignes, Lijing Shao, Huanchen Hu, Paulo C. C. Freire, Yongkun Zhang, Mengyao Xue, Ziyao Fang, David J. Champion, Mao Yuan, Chenchen Miao, Jiarui Niu, Qiuyang Fu, Jumei Yao, Yanjun Guo, Chengmin Zhang
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 46 (2024)
We observe systematic profile changes in the visible pulsar of the compact double neutron star system PSR J1946+2052 using observations with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The interpulse of PSR J1946+2052 changed fr
Externí odkaz:
https://doaj.org/article/5570b3c5dcc2474bb7f1b53ef225431d
Autor:
Vishnu Balakrishnan, Paulo C. C. Freire, S. M. Ransom, Alessandro Ridolfi, E. D. Barr, W. Chen, Vivek Venkatraman Krishnan, D. Champion, M. Kramer, T. Gautam, Prajwal V. Padmanabh, Yunpeng Men, F. Abbate, B. W. Stappers, I. Stairs, E. Keane, A. Possenti
Publikováno v:
The Astrophysical Journal Letters, Vol 942, Iss 2, p L35 (2023)
PSR J2140−2311B is a 13 ms pulsar discovered in 2001 in a 7.8 hr Green Bank Telescope observation of the core-collapsed globular cluster M30 and predicted to be in a highly eccentric binary orbit. This pulsar has eluded detection since then; theref
Externí odkaz:
https://doaj.org/article/ad24906a04ee466b9c5c79b91cec93d3
Autor:
Lei Zhang, Paulo C. C. Freire, Alessandro Ridolfi, Zhichen Pan, Jiaqi Zhao, Craig O. Heinke, Jianxing Chen, Mario Cadelano, Cristina Pallanca, Xian Hou, Xiaoting Fu, Shi Dai, Erbil Gügercinoğlu, Meng Guo, Jason Hessels, Jiale Hu, Guodong Li, Mengmeng Ni, Jingshan Pan, Scott M. Ransom, Qitong Ruan, Ingrid Stairs, Chao-Wei Tsai, Pei Wang, Long Wang, Na Wang, Qingdong Wu, Jianping Yuan, Jie Zhang, Weiwei Zhu, Yongkun Zhang, Di Li
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 269, Iss 2, p 56 (2023)
We report on a comprehensive multiwavelength study of the pulsars in the globular cluster (GC) M5, including the discovery of M5G, a new compact noneclipsing “black widow” pulsar. Thanks to the analysis of 34 yr of radio data taken with the Five-
Externí odkaz:
https://doaj.org/article/64d2461a78214eacbc5d590dbc23947b
Autor:
Evan F. Lewis, Timothy E. E. Olszanski, Julia S. Deneva, Paulo C. C. Freire, Maura A. McLaughlin, Kevin Stovall, Manjari Bagchi, Jose G. Martinez, Benetge B. P. Perera
Publikováno v:
The Astrophysical Journal, Vol 956, Iss 2, p 132 (2023)
We present the discovery and timing solutions of four millisecond pulsars (MSPs) discovered in the Arecibo 327 MHz Drift-Scan Pulsar Survey. Three of these pulsars are in binary systems, consisting of a redback (PSR J2055+1545), a black widow (PSR J1
Externí odkaz:
https://doaj.org/article/9eb4a8411d494305aec6e8dbb35aeaf0
Autor:
Mao Yuan, Weiwei Zhu, Michael Kramer, Bo Peng, Jiguang Lu, Renxin Xu, Lijing Shao, Hong-Guang Wang, Lingqi Meng, Jiarui Niu, Rushuang Zhao, Chenchen Miao, Xueli Miao, Mengyao Xue, Yi Feng, Pei Wang, Di Li, Chengming Zhang, David J. Champion, Emmanuel Fonseca, Huanchen Hu, Jumei Yao, Paulo C. C. Freire, Yanjun Guo
Publikováno v:
The Astrophysical Journal, Vol 949, Iss 2, p 115 (2023)
We discover three new weak pulse components in two known pulsars, one in PSR J0304+1932 and two in PSR J1518+4904. These components are emitted about halfway between the main emission beam and the interpulse beam (beam from the opposite pole). They a
Externí odkaz:
https://doaj.org/article/8abe49343a4042fda2f4538ee958bad7
Autor:
Jianxing Chen, Mario Cadelano, Cristina Pallanca, Francesco R. Ferraro, Barbara Lanzoni, Alina G. Istrate, Marta Burgay, Paulo C. C. Freire, Tasha Gautam, Andrea Possenti, Alessandro Ridolfi
Publikováno v:
The Astrophysical Journal, Vol 948, Iss 2, p 84 (2023)
We report on the discovery of the companion star to the millisecond pulsar PSR J1835−3259B in the Galactic globular cluster NGC 6652. Taking advantage of deep photometric archival observations acquired through the Hubble Space Telescope in near-UV
Externí odkaz:
https://doaj.org/article/56f32c49008f4b7f83ea56f954e2ae82