HIGH-PRECISION TIMING OF PSR J1713+0747 - SHAPIRO DELAY

被引:58
作者
CAMILO, F
FOSTER, RS
WOLSZCZAN, A
机构
[1] PRINCETON UNIV,DEPT PHYS,PRINCETON,NJ 08544
[2] USN,RES LAB,DIV REMOTE SENSING,WASHINGTON,DC 20375
[3] PENN STATE UNIV,DEPT ASTRON & ASTROPHYS,UNIVERSITY PK,PA 16802
关键词
ASTROMETRY; PULSARS; INDIVIDUAL (PSR J1713+0747); RELATIVITY;
D O I
10.1086/187677
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present results based on timing of the binary millisecond pulsar J1713+0747 for 22 months through 1994 February. We have measured its annual parallax, pi = (0.9 +/- 0.3) mas, as well as its proper motion, mu = (6.4 +/- 1.0) milliarcsec (mas) yr(-1). We detect a signature in the timing residuals that is most naturally interpreted as the general relativisitic ''Shapiro delay at the 2 sigma confidence level, we find the companion mass, m(2) > 0.27 M(.), while the pulsar mass, m(1) > 1.2 M.. Upper limits on both masses can only be obtained by imposing additional constraints on the system, such as requiring that general relativity be valid in the strong-field limit. With a post-fit weighted root mean square timing residual of approximately 0.4 mu s, and a characteristic age of roughly 9 x 10(9) yr, this pulsar is potentially the most stable celestial clock among all known pulsars.
引用
收藏
页码:L39 / L42
页数:4
相关论文
共 22 条
[1]   TIMING BEHAVIOR OF 96 RADIO PULSARS [J].
ARZOUMANIAN, Z ;
NICE, DJ ;
TAYLOR, JH ;
THORSETT, SE .
ASTROPHYSICAL JOURNAL, 1994, 422 (02) :671-680
[2]   TEMPORAL VARIATIONS OF PULSAR DISPERSION MEASURES [J].
BACKER, DC ;
HAMA, S ;
VANHOOK, S ;
FOSTER, RS .
ASTROPHYSICAL JOURNAL, 1993, 404 (02) :636-642
[3]   DISCOVERY OF 3 BINARY MILLISECOND PULSARS [J].
BAILES, M ;
HARRISON, PA ;
LORIMER, DR ;
JOHNSTON, S ;
LYNE, AG ;
MANCHESTER, RN ;
DAMICO, N ;
NICASTRO, L ;
TAURIS, TM ;
ROBINSON, C .
ASTROPHYSICAL JOURNAL, 1994, 425 (01) :L41-L44
[4]   THE MAGNETIC-FIELDS, AGES, AND ORIGINAL SPIN PERIODS OF MILLISECOND PULSARS [J].
CAMILO, F ;
THORSETT, SE ;
KULKARNI, SR .
ASTROPHYSICAL JOURNAL, 1994, 421 (01) :L15-L18
[5]  
CAMILO F, 1994, IN PRESS LIVES NEUTR
[6]  
DANZIGER IJ, 1993, ASTRON ASTROPHYS, V276, P382
[7]   INTERSTELLAR PROPAGATION EFFECTS AND THE PRECISION OF PULSAR TIMING [J].
FOSTER, RS ;
CORDES, JM .
ASTROPHYSICAL JOURNAL, 1990, 364 (01) :123-135
[8]   A NEW BINARY MILLISECOND PULSAR [J].
FOSTER, RS ;
WOLSZCZAN, A ;
CAMILO, F .
ASTROPHYSICAL JOURNAL, 1993, 410 (02) :L91-L94
[9]  
FOSTER RS, 1994, IN PRESS 7TH P M GRO
[10]   HIGH-PRECISION TIMING OF MILLISECOND PULSARS .3. LONG-TERM MONITORING OF PSRS B1885+09 AND B1937+21 [J].
KASPI, VM ;
TAYLOR, JH ;
RYBA, MF .
ASTROPHYSICAL JOURNAL, 1994, 428 (02) :713-728