J/ApJ/876/8 BVI LCs and radial velocities of PSR J1306-40 (Swihart+, 2019)
PSR J1306-40: an X-ray luminous redback with an evolved companion.
Swihart S.J., Strader J., Chomiuk L., Shishkovsky L.
<Astrophys. J., 876, 8 (2019)>
=2019ApJ...876....8S 2019ApJ...876....8S
ADC_Keywords: Pulsars; Binaries, X-ray; Radial velocities; Spectra, optical;
Photometry
Keywords: binaries: spectroscopic ; pulsars: general ; X-rays: binaries
Abstract:
PSR J1306-40 is a millisecond pulsar (MSP) binary with a
non-degenerate companion in an unusually long ∼1.097 day orbit. We
present new optical photometry and spectroscopy of this system, and
model these data to constrain fundamental properties of the binary
such as the component masses and distance. The optical data imply a
minimum neutron star mass of 1.75±0.09M☉ (1σ) and a
high, nearly edge-on inclination. The light curves suggest a large hot
spot on the companion, suggestive of a portion of the pulsar wind
being channeled to the stellar surface by the magnetic field of the
secondary, mediated via an intrabinary shock. The Hα line
profiles switch rapidly from emission to absorption near the companion
inferior conjunction, consistent with an eclipse of the compact
emission region at these phases. At our optically inferred distance of
4.7±0.5kpc, the X-ray luminosity is ∼1033erg/s, brighter than
nearly all known redbacks in the pulsar state. The long-period,
subgiant-like secondary, and luminous X-ray emission suggest this
system may be part of the expanding class of MSP binaries that are
progenitors to typical field pulsar-white dwarf binaries.
Description:
Spectra of the companion to PSR J1306-40 were obtained using
SOAR/Goodman from 2017 July 11 to 2018 June 9. The spectra covered a
wavelength range of ∼5485-6740Å.
Besides, optical BVI photometry of the companion to PSR J1306-40 were
obtained using ANDICAM on the SMARTS 1.3m telescope at CTIO over 101
nights between 2017 July 17 and 2018 April 29 (UT).
Objects:
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RA (ICRS) DE Designation(s) (Period)
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13 06 56.0 -40 35 23 PSR J1306-40 = FL8Y J1306.8-4035 (P=1.0972)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 27 43 Barycentric radial velocities of PSR J1306-40
table2.dat 28 280 SMARTS photometry of PSR J1306-40
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See also:
II/183 : UBVRI Photometric Standards (Landolt 1992)
I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)
J/PASP/110/863 : A Stellar Spectral Flux Library: 1150 - 25000 A (Pickles 1998)
J/AJ/131/1044 : Chromospherically active stars in the Bulge (Drake, 2006)
J/ApJ/696/870 : Catalina Real-time Transient Survey (CRTS) (Drake+, 2009)
J/ApJ/769/108 : Optical photometry of 4 millisecond pulsars (Breton+, 2013)
J/ApJS/218/23 : Fermi LAT third source catalog (3FGL) (Acero+, 2015)
J/ApJ/810/85 : Obs. of first Fermi-LAT sources at Parkes (Camilo+, 2015)
J/ApJ/831/89 : Eclipsing LMXB at 3FGL J0427.9-6704 center (Strader+, 2016)
J/ApJ/851/31 : 2FGL J0846.0+2820 opt. counterpart follow-up (Swihart+, 2017)
J/ApJ/866/83 : Opt/NIR obs. of 1FGLJ1417.7-4407 (Swihart+, 2018)
J/ApJ/872/42 : Opt. spectrosc. of redback ms pulsar binaries (Strader+, 2019)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1-15 F15.7 d BJD Barycentric Julian Date of observation
17-22 F6.1 km/s RV [-194.5/238.7] Barycentric radial velocity
24-27 F4.1 km/s e_RV [6/20.1] The 1-sigma error in radial velocity
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d BJD Barycentric Julian date of observation
15 A1 --- Band Broadband filter (B, V, or I)
17- 22 F6.3 mag omag [16.99/19.72] Apparent magnitude in Band
24- 28 F5.3 mag e_omag [0.017/0.2] The 1-sigma error in omag
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 23-Sep-2020