On the infrared, optical, and high-energy emission from the anomalous X-ray pulsar 4U 0142+61

被引:28
作者
Ertan, Ü
Cheng, KS
机构
[1] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
[2] Sabanci Univ, TR-34956 Istanbul, Turkey
关键词
accretion; accretion disks; pulsars : individual (4U 0142+61); stars : neutron; X-rays : bursts;
D O I
10.1086/382502
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We show that the observed pulsed optical emission of the anomalous X-ray pulsar 4U 0142+61 can be accounted for by both the magnetar outer gap models and the disk-star dynamo gap models; therefore, there is no evidence favoring only one of these models as its responsible mechanism. Nevertheless, the estimated high-energy gamma-ray spectra from these models have different power-law indices and can be tested by future observations with the Gamma-Ray Large Area Space Telescope (GLAST). Furthermore, we show by analytical estimations that the expectations of a standard disk model are in agreement with the observed unpulsed optical and infrared luminosities of the AXP 4U 0142+61.
引用
收藏
页码:840 / 845
页数:6
相关论文
共 40 条
[1]   On young neutron stars as propellers and accretors with conventional magnetic fields [J].
Alpar, MA .
ASTROPHYSICAL JOURNAL, 2001, 554 (02) :1245-1254
[2]   An accretion model for anomalous X-ray pulsars [J].
Chatterjee, P ;
Hernquist, L ;
Narayan, R .
ASTROPHYSICAL JOURNAL, 2000, 534 (01) :373-379
[3]   The spin period, luminosity, and age distributions of anomalous X-ray pulsars [J].
Chatterjee, P ;
Hernquist, L .
ASTROPHYSICAL JOURNAL, 2000, 543 (01) :368-372
[4]   ENERGETIC RADIATION FROM RAPIDLY SPINNING PULSARS .2. VELA AND CRAB [J].
CHENG, KS ;
HO, C ;
RUDERMAN, M .
ASTROPHYSICAL JOURNAL, 1986, 300 (02) :522-539
[5]   PULSED GAMMA-RAY EMISSION FROM SHORT-PERIOD PULSARS [J].
CHENG, KS ;
DING, WKY .
ASTROPHYSICAL JOURNAL, 1994, 431 (02) :724-731
[6]   High-energy gamma-ray emission from anomalous X-ray pulsars [J].
Cheng, KS ;
Zhang, L .
ASTROPHYSICAL JOURNAL, 2001, 562 (02) :918-924
[7]   STATIONARY ACCELERATORS AROUND KEPLERIAN DISKS OF ALIGNED MAGNETIZED COLLAPSED OBJECTS - PAIR PRODUCTION AND GAMMA-RAY EMISSION [J].
CHENG, KS ;
RUDERMAN, M .
ASTROPHYSICAL JOURNAL, 1991, 373 (01) :187-197
[8]   Period clustering of the anomalous X-ray pulsars and magnetic field decay in magnetars [J].
Colpi, M ;
Geppert, U ;
Page, D .
ASTROPHYSICAL JOURNAL, 2000, 529 (01) :L29-L32
[9]   X-ray irradiation in low-mass binary systems [J].
Dubus, G ;
Lasota, JP ;
Hameury, JM ;
Charles, P .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1999, 303 (01) :139-147
[10]   FORMATION OF VERY STRONGLY MAGNETIZED NEUTRON-STARS - IMPLICATIONS FOR GAMMA-RAY BURSTS [J].
DUNCAN, RC ;
THOMPSON, C .
ASTROPHYSICAL JOURNAL, 1992, 392 (01) :L9-L13