DETECTION AND FLUX DENSITY MEASUREMENTS OF THE MILLISECOND PULSAR J2145-0750 BELOW 100 MHz

被引：16

作者：

Dowell, J. ^{[1
]}

Ray, P. S. ^{[2
]}

Taylor, G. B. ^{[1
]}

Blythe, J. N. ^{[3
]}

Clarke, T. ^{[4
]}

Craig, J. ^{[1
]}

Ellingson, S. W. ^{[5
]}

Helmboldt, J. F. ^{[4
]}

Henning, P. A. ^{[1
]}

Lazio, T. J. W. ^{[6
]}

Schinzel, F. ^{[1
]}

Stovall, K. ^{[7
,8
]}

Wolfe, C. N. ^{[5
]}

机构：

[1] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA

[2] Naval Res Lab, Div Space Sci, Washington, DC 20375 USA

[3] Georgia Inst Technol, Sch Phys, Atlanta, GA USA

[4] US Naval Res Lab, Washington, DC 20375 USA

[5] Virginia Tech, Bradley Dept Elect & Comp Engn, Blacksburg, VA 24061 USA

[6] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[7] Univ Texas Brownsville, Ctr Gravitat Wave Astron, Brownsville, TX 78520 USA

[8] Univ Texas Brownsville, Dept Phys & Astron, Brownsville, TX 78520 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2013年 / 775卷 / 01期

基金：

美国国家科学基金会;

关键词：

pulsars: general; pulsars: individual (PSR J2145-0750); SCINTILLATION; DISPERSION; TELESCOPE; SPECTRA;

D O I：

10.1088/2041-8205/775/1/L28

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present flux density measurements and pulse profiles for the millisecond pulsar PSR J2145-0750 spanning 37 to 81 MHz using data obtained from the first station of the Long Wavelength Array. These measurements represent the lowest frequency detection of pulsed emission from a millisecond pulsar to date. We find that the pulse profile is similar to that observed at 102 MHz. We also find that the flux density spectrum between approximate to 40 MHz to 5 GHz is suggestive of a break and may be better fit by a model that includes spectral curvature with a rollover around 730 MHz rather than a single power law.

引用

页数：5

共 19 条

[1] A NEW CLASS OF RADIO PULSARS [J].

ALPAR, MA ;

CHENG, AF ;

RUDERMAN, MA ;

SHAHAM, J .

NATURE, 1982, 300 (5894) :728-730

[2] 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

[3]

Dowell J., 2012, JAI, V1

[4] The LWA1 Radio Telescope [J].

Ellingson, S. W. ;

Taylor, G. B. ;

Craig, J. ;

Hartman, J. ;

Dowell, J. ;

Wolfe, C. N. ;

Clarke, T. E. ;

Hicks, B. C. ;

Kassim, N. E. ;

Ray, P. S. ;

Rickard, L. J. ;

Schinzel, F. K. ;

Weiler, K. W. .

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2013, 61 (05) :2540-2549

[5] THE RADIO-CONTINUUM SPECTRUM OF PSR 1937+214 [J].

ERICKSON, WC ;

MAHONEY, MJ .

ASTROPHYSICAL JOURNAL, 1985, 299 (01) :L29-L31

[6] REFRACTIVE INTERSTELLAR SCINTILLATION OF PULSAR INTENSITIES AT 74 MHZ [J].

GUPTA, Y ;

RICKETT, BJ ;

COLES, WA .

ASTROPHYSICAL JOURNAL, 1993, 403 (01) :183-201

[7] PSRCHIVE and PSRFITS: An open approach to radio pulsar data storage and analysis [J].

Hotan, AW ;

van Straten, W ;

Manchester, RN .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA, 2004, 21 (03) :302-309

[8] Scintillation parameters for 49 pulsars [J].

Johnston, S ;

Nicastro, L ;

Koribalski, B .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1998, 297 (01) :108-116

[9] Measurement and correction of variations in interstellar dispersion in high-precision pulsar timing [J].

Keith, M. J. ;

Coles, W. ;

Shannon, R. M. ;

Hobbs, G. B. ;

Manchester, R. N. ;

Bailes, M. ;

Bhat, N. D. R. ;

Burke-Spolaor, S. ;

Champion, D. J. ;

Chaudhary, A. ;

Hotan, A. W. ;

Khoo, J. ;

Kocz, J. ;

Oslowski, S. ;

Ravi, V. ;

Reynolds, J. E. ;

Sarkissian, J. ;

van Straten, W. ;

Yardley, D. R. B. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2013, 429 (03) :2161-2174

[10]

Kijak J, 1997, ASTRON ASTROPHYS, V318, pL63

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