J/ApJ/872/43 IR spectroscopy of symbiotic stars. XII. V934 Her (Hinkle+, 2019)
Infrared spectroscopy of symbiotic stars.
XII. The neutron star SyXB system 4U 1700+24 = V934 Herculis.
Hinkle K.H., Fekel F.C., Joyce R.R., Mikolajewska J., Galan C., Lebzelter T.
<Astrophys. J., 872, 43 (2019)>
=2019ApJ...872...43H 2019ApJ...872...43H
ADC_Keywords: Binaries, X-ray; Stars, neutron; Stars, M-type; Spectra, infrared;
Radial velocities
Keywords: binaries: symbiotic ; stars: abundances ; stars: evolution ;
stars: individual (V934 Her) ; stars: late-type ; X-rays: binaries
Abstract:
The X-ray symbiotic (SyXB) V934 Her = 4U1700+24 is an M giant-neutron
star (NS) binary system. Employing optical and infrared radial
velocities spanning 29yr combined with the extensive velocities in the
literature, we compute the spectroscopic orbit of the M giant in that
system. We determine an orbital period of 4391d, or 12.0yr, the
longest for any SyXB and far longer than the 404 day orbit commonly
cited for this system in the literature. In addition to the 12.0yr
orbital period, we find a shorter period of 420 days, similar to the
one previously found. Instead of orbital motion, we attribute this
much shorter period to long secondary pulsation of the M3 III SRb
variable. Our new orbit supports earlier work that concluded that the
orbit is seen nearly pole-on, which is why X-ray pulsations associated
with the NS have not been detected. We estimate an orbital inclination
of 11.3°±0.4°. Arguments are made that this low inclination
supports a pulsation origin for the 420 day secondary period. We also
measure the CNO and Fe peak abundances of the M giant and find it to
be slightly metal-poor compared to the Sun, with no trace of the
NS-forming supernova event. The basic properties of the M giant and NS
are derived. We discuss the possible evolutionary paths that this
system has taken to get to its current state.
Description:
We observed the spectrum of V934 Her at high resolution in the optical
and near-infrared on 90 occasions using five telescopes at four
different observatories with six different instruments (See Table 1).
The initial observation in our data set was obtained in 1988 July.
However, our monitoring of V934 Her started more than a decade later
on 2000 July 13 with the Kitt Peak National Observatory (KPNO) 2.1m
telescope. The most recent set of velocity observations, which
continued into 2017, were acquired with the Fairborn 2m telescope and
fiber-fed echelle spectrograph. Thus, our velocity data set spans 29yr.
Objects:
----------------------------------------------------------
RA (ICRS)n DE Designation(s)
----------------------------------------------------------
17 06 34.51 +23 58 18.7 V934 Her = HD 154791
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 57 172 Radial velocities of V934 Her
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See also:
IX/2 : Second Ariel X-Ray Catalogue (2A) (Cooke+ 1978)
IX/4 : Fourth UHURU Catalogue (4U) (Forman+ 1978)
II/346 : JMMC Stellar Diameters Catalogue - JSDC. Version 2 (Bourges+, 2017)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/ApJS/95/535 : IR CO line list for X 1Σ+ state (Goorvitch, 1994)
J/A+AS/115/339 : Stellar models VI. (Charbonnel+, 1996)
J/ApJS/111/445 : Spectra of normal stars in the K band (Wallace+ 1997)
J/ApJS/124/527 : Oscillator strengths for lines in JH bands (Melendez+, 1999)
J/A+A/469/807 : Catalogue of Galactic low-mass X-ray binaries (Liu+, 2007)
J/ApJ/660/1486 : Variability of LMC semiregular variables (Soszynski+, 2007)
J/A+A/498/627 : Radial velocities of SB with M giant (Famaey+, 2009)
J/MNRAS/399/2063 : LMC red giants in D sequence (Nicholls+, 2009)
J/AJ/145/111 : Radial velocities of five spectroscopic bin. (Fekel+, 2013)
J/ApJS/214/26 : Line lists for CN isotopes transitions (Sneden+, 2014)
J/ApJS/221/24 : SDSS-III APOGEE H-band spectral line lists (Shetrone+, 2015)
J/MNRAS/448/464 : JHK lightcurves of red giants in the SMC (Takayama+, 2015)
J/ApJ/825/38 : Carbon & oxygen ratios for nearby Miras (Hinkle+, 2016)
J/A+A/608/A100 : CMD and mass distribution of Ba stars (Escorza+, 2017)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 F11.4 d HJD [45072.39/58028.7] Heliocentric Julian date;
HJD-2400000
13- 18 F6.2 km/s RV [-51.3/-44] Observed total radial velocity
20- 24 F5.2 km/s O-C [-3.1/2.1] Observed minus calculated
velocity residual
26- 30 F5.3 --- phiL [0.005/1] Long period orbital phase
32- 37 F6.2 km/s RVlong [-51.8/-44.4] Long period radial velocity (1)
39- 43 F5.3 --- phiS [0.003/1] Short period orbital phase
45- 49 F5.2 km/s RVshort [-2.6/2] Short period radial velocity (2)
51- 55 A5 --- Inst Source (3)
57 A1 --- Band [b-g ] Passband (4)
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Note (1): The long period velocity is equal to the total velocity minus the
computed short period velocity.
Note (2): The short period velocity is equal to the total velocity minus the
computed long period velocity.
Note (3): Sources used as follows:
CfA = Center for Astrophysics (D. Galloway 2017, private communication
-- 83 occurrences);
KPNO1 = KPNO 4m + FTS (1 occurrence);
KPNO2 = KPNO 2.1m + Phoenix (3 occurrences);
KPNO3 = KPNO coude feed + NICMASS (1 occurrence);
MSO = Mount Stromlo Observatory 1.88m + NICMASS (6 occurrences);
GemS = Gemini South 8m + Phoenix (1 occurrence);
KPNO4 = KPNO coude feed + LB1A (32 occurrences);
KPNO5 = KPNO 4m + Phoenix (1 occurrence);
Fair = Fairborn Observatory 2m telescope + fiber-fed echelle spectrograph
(44 occurrences).
Note (4): Passband used as follows:
b = 2.335um;
c = 1.557um;
d = 2.226um, R=70000;
e = 2.311um;
f = 1.562um;
g = 1.563um.
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History:
From electronic version of the journal
References:
Fekel et al. Paper I. 2000AJ....119.1375F 2000AJ....119.1375F
Fekel et al. Paper II. 2000AJ....120.3255F 2000AJ....120.3255F
Fekel et al. Paper III. 2001AJ....121.2219F 2001AJ....121.2219F
Hinkle et al. Paper IV. 2006ApJ...641..479H 2006ApJ...641..479H
Fekel et al. Paper V. 2007AJ....133...17F 2007AJ....133...17F
Fekel et al. Paper VI. 2008AJ....136..146F 2008AJ....136..146F
Hinkle et al. Paper VII. 2009ApJ...692.1360H 2009ApJ...692.1360H
Fekel et al. Paper VIII. 2010AJ....139.1315F 2010AJ....139.1315F
Hinkle et al. Paper IX. 2013ApJ...770...28H 2013ApJ...770...28H
Fekel et al. Paper X. 2015AJ....150...48F 2015AJ....150...48F
Fekel et al. Paper XI. 2017AJ....153...35F 2017AJ....153...35F Cat. J/AJ/153/35
Hinkle et al. Paper XII. 2019ApJ...872...43H 2019ApJ...872...43H This catalog.
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 03-Aug-2020