PSR J1922+37: a 1.9 s Pulsar Discovered in the Direction of the Old Open Cluster NGC 6791

被引：0

作者：

Liu, Xiao-Jin ^{[1
,2
]}

Sengar, Rahul ^{[3
,4
]}

Bailes, Matthew ^{[5
,6
]}

Eatough, Ralph P. ^{[7
,8
]}

Yuan, Jianping ^{[9
]}

Wang, Na ^{[9
]}

Zhu, Weiwei ^{[7
,10
]}

Zhou, Lu ^{[2
,11
]}

Gao, He ^{[10
,12
]}

Zhu, Zong-Hong ^{[10
,11
,12
]}

Zhu, Xing-Jiang ^{[1
,2
,10
]}

机构：

[1] Beijing Normal Univ, Fac Arts & Sci, Dept Phys, Zhuhai 519087, Peoples R China

[2] Beijing Normal Univ, Adv Inst Nat Sci, Zhuhai 519087, Peoples R China

[3] Max Planck Inst Grav Phys, Albert Einstein Inst, D-30167 Hannover, Germany

[4] Leibniz Univ Hannover, D-30167 Hannover, Germany

[5] Swinburne Univ Technol, POB 218, Lilydale, 3122, Australia

[6] OzGrav ARC Ctr Excellence Gravitat Wave Discovery, Hawthorn, 3122, Australia

[7] Natl Astron Observ, Beijing 650011, Peoples R China

[8] Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany

[9] Chinese Acad Sci, 150 Sci 1 St, Beijing, Peoples R China

[10] Beijing Normal Univ, Beijing, Peoples R China

[11] Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Hubei, Peoples R China

[12] Beijing Normal Univ, Beijing, Peoples R China

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2025年 / 981卷 / 02期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

MILLISECOND PULSARS; GLOBULAR-CLUSTERS; STAR-CLUSTERS; NEUTRON-STAR; SLOW PULSARS; BINARIES; ASTROPY;

D O I：

10.3847/2041-8213/adb9c4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

More than 300 pulsars have been discovered in Galactic globular clusters; however, none have been found in open clusters. Here we present results from a 20 hr survey of seven open clusters with the Five-hundred-meter Aperture Spherical radio Telescope. Our first discovery is a 1.9 s pulsar (J1922+37) found in the direction of the old open cluster NGC 6791. The measured dispersion measure (DM) implies a distance of 4.79 and 8.92 kpc based on the NE2001 and YMW16 electron density models, respectively. Given the large uncertainty of DM distance estimates, it is plausible that PSR J1922+37 is indeed a member of NGC 6791, for which the distance is 4.19 +/- 0.02 kpc based on Gaia Data Release 3. If confirmed, PSR J1922+37 will be the first pulsar found in a Galactic open cluster. We outline future observations that can confirm this pulsar-open cluster association and discuss the importance of this pulsar for calibrating the characteristic ages of the pulsar population.

引用

页数：8