1fgl J1417.7–4407: A Likely Gamma-Ray Bright Binary With a Massive Neutron Star and a Giant Secondary

Strader, Jay; Chomiuk, Laura; Cheung, C. C.; Sand, David J.; Donato, D.; Corbet, R. H. D.; Koeppe, Dana; Edwards, P. G.; Stevens, J.; Petrov, Leonid; Salinas, R.; Peacock, Mark B.; Finzell, Thomas; Reichart, D.; Haislip, J.

doi:10.1088/2041-8205/804/1/l12

Cited by 47 publications

(102 citation statements)

References 57 publications

(62 reference statements)

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“…In 2013 February 4, it was observed with the 6 km configuration and, again, no radio emission was detected. Strader et al (2015) confirmed the nature of the optical counterpart, whose spectrum corresponds to a late G or early K star. Assuming the donor is filling its Roche lobe, they conclude that the object is a giant star.…”

Section: Summary Of Recent Observationssupporting

confidence: 62%

Does PSR J1417-4402 system behave as a “Redback”?

Vito

Horvath

Benvenuto

2018

Monthly Notices of the Royal Astronomical Society

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We study the present evolutionary status of the binary system containing the 2.66 ms pulsar PSR J1417-4402 in a 5.4 day orbit. This is the pulsar in the original source 3FGL J1417.5-4402, that has undergone a transition from X-ray state to a pulsar state, just like some redbacks did. The system has many characteristics similar to redback pulsars family, but is on a much wider orbit. We show that close binary evolution including irradiation feedback driven by the luminosity due to accretion onto the neutron star component of the pair, and evaporation due to pulsar emission, is able to account for the masses of the components and the photometric data of the donor star. The tracks leading to the present PSR J1417-4402 are degenerate within a range of parameters, suggesting that the same physics invoked to explain the redback/black widows groups leads to the formation of much wider orbit systems, outside the redback region limits.

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Section: Summary Of Recent Observationssupporting

confidence: 62%

Does PSR J1417-4402 system behave as a “Redback”?

Vito

Horvath

Benvenuto

2018

Monthly Notices of the Royal Astronomical Society

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“…In particular, on 30 Apr 2016 we observed the system for over 4 hr consecutively. All spectra were reduced and extracted in the standard manner as described in Strader et al (2015).…”

Section: Soar Spectroscopy and Properties Of The Secondarymentioning

confidence: 99%

Orbital Dynamics of Candidate Transitional Millisecond Pulsar 3FGL J1544.6-1125: An Unusually Face-on System

Britt

Strader

Chomiuk

et al. 2017

ApJ

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We present the orbital solution for the donor star of the candidate transitional millisecond pulsar 3FGL J1544.6-1125, currently observed as an accreting low-mass X-ray binary. The orbital period is 0.2415361(36) days, entirely consistent with the spectral classification of the donor star as a mid to late K dwarf. The semiamplitude of the radial velocity curve is exceptionally low at K 2 = 39.3 ± 1.5 km s −1 , implying a remarkably face-on inclination in the range 5-8• , depending on the neutron star and donor masses. After determining the veiling of the secondary, we derive a distance to the binary of 3.8 ± 0.7 kpc, yielding a 0.3-10 keV Xray luminosity of 6.1 ± 1.9 × 10 33 erg s −1 , similar to confirmed transitional millisecond pulsars. As face-on binaries rarely occur by chance, we discuss the possibility that Fermi-selected samples of transitional millisecond pulsars in the sub-luminous disk state are affected by beaming. By phasing emission line strength on the spectroscopic ephemeris, we find coherent variations, and argue that these variations are most consistent with emission from an asymmetric shock originating near the inner disk.

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“…Once the optical counterpart is identified, time-series optical observations can test the BW/RB identity by searching for the orbital modulation on timescale of hours produced by pulsar irradiation on the companion and/or ellipsoidal variation. Through this multiwavelength technique, several UFOs, for examples, 2FGL J1311.7−3429/PSR J1311−3430 (Pletsch et al 2012), 1FGL J1417.7−4407/PSR J1417−4402 (not a canonical BW/RB system; Strader et al 2015;Camilo et al 2016), and 1FGL J2339.7−0531/PSR J2339−0533 (Kong et al 2012;Pletsch & Clark 2015) have been identified as MSP binaries and some of them have been confirmed by the detection of millisecond radio/γ-ray pulsations, proving the validity of the method.…”

Section: Introductionmentioning

confidence: 99%

Discovery of a Redback Millisecond Pulsar Candidate: 3fgl J0212.1+5320

Kong

Hou

et al. 2016

ApJ

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We present a multi-wavelength study of the unidentified Fermi object, 3FGL J0212.1+5320. Within the 95% error ellipse, Chandra detects a bright X-ray source (i.e., F 0.5−7keV = 1.4 × 10 −12 erg cm −2 s −1 ), which has a low-mass optical counterpart (M 0.4M ⊙ and T ∼ 6000K). A clear ellipsoidal modulation is shown in optical/infrared at 20.87 hours. The gamma-ray properties of 3FGL J0212.1+5320 are all consistent with that of a millisecond pulsar, suggesting that it is a γ-ray redback millisecond pulsar binary with a low-mass companion filling 64% of the Roche-lobe. If confirmed, it will be a redback binary with one of the longest orbital periods known. Spectroscopic data taken in 2015 from the Lijiang observatory show no evidence of strong emission lines, revealing that the accretion is currently inactive (the rotation-powered pulsar state). This is consistent with the low X-ray luminosities (L X ≈ 10 32 erg s −1 ) and the possible X-ray modulation seen by Chandra and Swift. Considering that the X-ray luminosity and the high X-ray-to-γ-ray flux ratio (8%) are both comparable to that of the two known γ-ray transitional millisecond pulsars, we suspect that 3FGL J0212.1+5320 could be a potential target to search for future transition to the accretion active state.

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1fgl J1417.7–4407: A Likely Gamma-Ray Bright Binary With a Massive Neutron Star and a Giant Secondary

Cited by 47 publications

References 57 publications

Does PSR J1417-4402 system behave as a “Redback”?

Does PSR J1417-4402 system behave as a “Redback”?

Orbital Dynamics of Candidate Transitional Millisecond Pulsar 3FGL J1544.6-1125: An Unusually Face-on System

Discovery of a Redback Millisecond Pulsar Candidate: 3fgl J0212.1+5320

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