A second chromatic timing event of interstellar origin toward PSR J1713+0747

M. T. Lam; J. A. Ellis; G. Grillo; M. L. Jones; J. S. Hazboun; P. R. Brook; J. E. Turner; S. Chatterjee; J. M. Cordes; T. J. W. Lazio; M. E. DeCesar; Z. Arzoumanian; H. Blumer; H. T. Cromartie; P. B. Demorest; T. Dolch; R. D. Ferdman; E. C. Ferrara; E. Fonseca; N. Garver-Daniels; P. A. Gentile; V. Gupta; D. R. Lorimer; R. S. Lynch; D. R. Madison; M. A. McLaughlin; C. Ng; D. J. Nice; T. T. Pennucci; S. M. Ransom; R. Spiewak; I. H. Stairs; D. R. Stinebring; K. Stovall; J. K. Swiggum; S. J. Vigeland; W. W. Zhu

doi:10.3847/1538-4357/aac770

A second chromatic timing event of interstellar origin toward PSR J1713+0747

M. T. Lam, J. A. Ellis, G. Grillo, M. L. Jones, J. S. Hazboun, P. R. Brook, J. E. Turner, S. Chatterjee, J. M. Cordes, T. J. W. Lazio, M. E. DeCesar, Z. Arzoumanian, H. Blumer, H. T. Cromartie, P. B. Demorest, T. Dolch, R. D. Ferdman, E. C. Ferrara, E. Fonseca, N. Garver-DanielsP. A. Gentile, V. Gupta, D. R. Lorimer, R. S. Lynch, D. R. Madison, M. A. McLaughlin, C. Ng, D. J. Nice, T. T. Pennucci, S. M. Ransom, R. Spiewak, I. H. Stairs, D. R. Stinebring, K. Stovall, J. K. Swiggum, S. J. Vigeland, W. W. Zhu

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Abstract

The frequency dependence of radio pulse arrival times provides a probe of structures in the intervening media. Demorest et al. was the first to show a short-term (~100–200 days) reduction in the electron content along the line of sight to PSR J1713+0747 in data from 2008 (approximately MJD 54750) based on an apparent dip in the dispersion measure of the pulsar. We report on a similar event in 2016 (approximately MJD 57510), with average residual pulse-arrival times ≈−3.0, −1.3, and −0.7 μs at 820, 1400, and 2300 MHz, respectively. Timing analyses indicate possible departures from the standard ν −2 dispersive-delay dependence. We discuss and rule out a wide variety of potential interpretations. We find the likeliest scenario to be lensing of the radio emission by some structure in the interstellar medium, which causes multiple frequency-dependent pulse arrival-time delays.

Original language	English
Article number	132
Journal	Astrophysical Journal
Volume	861
DOIs	https://doi.org/10.3847/1538-4357/aac770
Publication status	Published - 12 Jul 2018

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Lam, M. T., Ellis, J. A., Grillo, G., Jones, M. L., Hazboun, J. S., Brook, P. R., Turner, J. E., Chatterjee, S., Cordes, J. M., Lazio, T. J. W., DeCesar, M. E., Arzoumanian, Z., Blumer, H., Cromartie, H. T., Demorest, P. B., Dolch, T., Ferdman, R. D., Ferrara, E. C., Fonseca, E., ... Zhu, W. W. (2018). A second chromatic timing event of interstellar origin toward PSR J1713+0747. Astrophysical Journal, 861, [132]. https://doi.org/10.3847/1538-4357/aac770

Lam, M. T. ; Ellis, J. A. ; Grillo, G. ; Jones, M. L. ; Hazboun, J. S. ; Brook, P. R. ; Turner, J. E. ; Chatterjee, S. ; Cordes, J. M. ; Lazio, T. J. W. ; DeCesar, M. E. ; Arzoumanian, Z. ; Blumer, H. ; Cromartie, H. T. ; Demorest, P. B. ; Dolch, T. ; Ferdman, R. D. ; Ferrara, E. C. ; Fonseca, E. ; Garver-Daniels, N. ; Gentile, P. A. ; Gupta, V. ; Lorimer, D. R. ; Lynch, R. S. ; Madison, D. R. ; McLaughlin, M. A. ; Ng, C. ; Nice, D. J. ; Pennucci, T. T. ; Ransom, S. M. ; Spiewak, R. ; Stairs, I. H. ; Stinebring, D. R. ; Stovall, K. ; Swiggum, J. K. ; Vigeland, S. J. ; Zhu, W. W. / A second chromatic timing event of interstellar origin toward PSR J1713+0747. In: Astrophysical Journal. 2018 ; Vol. 861.

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title = "A second chromatic timing event of interstellar origin toward PSR J1713+0747",

abstract = "The frequency dependence of radio pulse arrival times provides a probe of structures in the intervening media. Demorest et al. was the first to show a short-term (~100–200 days) reduction in the electron content along the line of sight to PSR J1713+0747 in data from 2008 (approximately MJD 54750) based on an apparent dip in the dispersion measure of the pulsar. We report on a similar event in 2016 (approximately MJD 57510), with average residual pulse-arrival times ≈−3.0, −1.3, and −0.7 μs at 820, 1400, and 2300 MHz, respectively. Timing analyses indicate possible departures from the standard ν −2 dispersive-delay dependence. We discuss and rule out a wide variety of potential interpretations. We find the likeliest scenario to be lensing of the radio emission by some structure in the interstellar medium, which causes multiple frequency-dependent pulse arrival-time delays.",

author = "Lam, {M. T.} and Ellis, {J. A.} and G. Grillo and Jones, {M. L.} and Hazboun, {J. S.} and Brook, {P. R.} and Turner, {J. E.} and S. Chatterjee and Cordes, {J. M.} and Lazio, {T. J. W.} and DeCesar, {M. E.} and Z. Arzoumanian and H. Blumer and Cromartie, {H. T.} and Demorest, {P. B.} and T. Dolch and Ferdman, {R. D.} and Ferrara, {E. C.} and E. Fonseca and N. Garver-Daniels and Gentile, {P. A.} and V. Gupta and Lorimer, {D. R.} and Lynch, {R. S.} and Madison, {D. R.} and McLaughlin, {M. A.} and C. Ng and Nice, {D. J.} and Pennucci, {T. T.} and Ransom, {S. M.} and R. Spiewak and Stairs, {I. H.} and Stinebring, {D. R.} and K. Stovall and Swiggum, {J. K.} and Vigeland, {S. J.} and Zhu, {W. W.}",

year = "2018",

month = jul,

day = "12",

doi = "10.3847/1538-4357/aac770",

language = "English",

volume = "861",

journal = "Astrophysical Journal",

issn = "0004-637X",

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Lam, MT, Ellis, JA, Grillo, G, Jones, ML, Hazboun, JS, Brook, PR, Turner, JE, Chatterjee, S, Cordes, JM, Lazio, TJW, DeCesar, ME, Arzoumanian, Z, Blumer, H, Cromartie, HT, Demorest, PB, Dolch, T, Ferdman, RD, Ferrara, EC, Fonseca, E, Garver-Daniels, N, Gentile, PA, Gupta, V, Lorimer, DR, Lynch, RS, Madison, DR, McLaughlin, MA, Ng, C, Nice, DJ, Pennucci, TT, Ransom, SM, Spiewak, R, Stairs, IH, Stinebring, DR, Stovall, K, Swiggum, JK, Vigeland, SJ & Zhu, WW 2018, 'A second chromatic timing event of interstellar origin toward PSR J1713+0747', Astrophysical Journal, vol. 861, 132. https://doi.org/10.3847/1538-4357/aac770

A second chromatic timing event of interstellar origin toward PSR J1713+0747. / Lam, M. T.; Ellis, J. A.; Grillo, G.; Jones, M. L.; Hazboun, J. S.; Brook, P. R.; Turner, J. E.; Chatterjee, S.; Cordes, J. M.; Lazio, T. J. W.; DeCesar, M. E.; Arzoumanian, Z.; Blumer, H.; Cromartie, H. T.; Demorest, P. B.; Dolch, T.; Ferdman, R. D.; Ferrara, E. C.; Fonseca, E.; Garver-Daniels, N.; Gentile, P. A.; Gupta, V.; Lorimer, D. R.; Lynch, R. S.; Madison, D. R.; McLaughlin, M. A.; Ng, C.; Nice, D. J.; Pennucci, T. T.; Ransom, S. M.; Spiewak, R.; Stairs, I. H.; Stinebring, D. R.; Stovall, K.; Swiggum, J. K.; Vigeland, S. J.; Zhu, W. W.

In: Astrophysical Journal, Vol. 861, 132, 12.07.2018.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - A second chromatic timing event of interstellar origin toward PSR J1713+0747

AU - Lam, M. T.

AU - Ellis, J. A.

AU - Grillo, G.

AU - Jones, M. L.

AU - Hazboun, J. S.

AU - Brook, P. R.

AU - Turner, J. E.

AU - Chatterjee, S.

AU - Cordes, J. M.

AU - Lazio, T. J. W.

AU - DeCesar, M. E.

AU - Arzoumanian, Z.

AU - Blumer, H.

AU - Cromartie, H. T.

AU - Demorest, P. B.

AU - Dolch, T.

AU - Ferdman, R. D.

AU - Ferrara, E. C.

AU - Fonseca, E.

AU - Garver-Daniels, N.

AU - Gentile, P. A.

AU - Gupta, V.

AU - Lorimer, D. R.

AU - Lynch, R. S.

AU - Madison, D. R.

AU - McLaughlin, M. A.

AU - Ng, C.

AU - Nice, D. J.

AU - Pennucci, T. T.

AU - Ransom, S. M.

AU - Spiewak, R.

AU - Stairs, I. H.

AU - Stinebring, D. R.

AU - Stovall, K.

AU - Swiggum, J. K.

AU - Vigeland, S. J.

AU - Zhu, W. W.

PY - 2018/7/12

Y1 - 2018/7/12

N2 - The frequency dependence of radio pulse arrival times provides a probe of structures in the intervening media. Demorest et al. was the first to show a short-term (~100–200 days) reduction in the electron content along the line of sight to PSR J1713+0747 in data from 2008 (approximately MJD 54750) based on an apparent dip in the dispersion measure of the pulsar. We report on a similar event in 2016 (approximately MJD 57510), with average residual pulse-arrival times ≈−3.0, −1.3, and −0.7 μs at 820, 1400, and 2300 MHz, respectively. Timing analyses indicate possible departures from the standard ν −2 dispersive-delay dependence. We discuss and rule out a wide variety of potential interpretations. We find the likeliest scenario to be lensing of the radio emission by some structure in the interstellar medium, which causes multiple frequency-dependent pulse arrival-time delays.

AB - The frequency dependence of radio pulse arrival times provides a probe of structures in the intervening media. Demorest et al. was the first to show a short-term (~100–200 days) reduction in the electron content along the line of sight to PSR J1713+0747 in data from 2008 (approximately MJD 54750) based on an apparent dip in the dispersion measure of the pulsar. We report on a similar event in 2016 (approximately MJD 57510), with average residual pulse-arrival times ≈−3.0, −1.3, and −0.7 μs at 820, 1400, and 2300 MHz, respectively. Timing analyses indicate possible departures from the standard ν −2 dispersive-delay dependence. We discuss and rule out a wide variety of potential interpretations. We find the likeliest scenario to be lensing of the radio emission by some structure in the interstellar medium, which causes multiple frequency-dependent pulse arrival-time delays.

U2 - 10.3847/1538-4357/aac770

DO - 10.3847/1538-4357/aac770

M3 - Article

VL - 861

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

M1 - 132

ER -