J/ApJ/896/162 EBs in Ruprecht 147. III. EPIC 219552514 (Torres+, 2020)
Eclipsing binaries in the open cluster Ruprecht 147.
III. The triple system EPIC 219552514 at the main-sequence turnoff.
Torres G., Vanderburg A., Curtis J.L., Kraus A.L., Rizzuto A.C.,
Ireland M.J.
<Astrophys. J., 896, 162 (2020)>
=2020ApJ...896..162T 2020ApJ...896..162T
ADC_Keywords: Binaries, eclipsing; Photometry; Spectra, optical;
Radial velocities
Keywords: Eclipsing binary stars ; Fundamental parameters of stars ;
Stellar evolution ; Open star clusters ; Stellar ages
Abstract:
Spectroscopic observations are reported for the 2.75 day,
double-lined, detached eclipsing binary EPIC 219552514 located at the
turnoff of the old nearby open cluster Ruprecht 147. A joint analysis
of our radial-velocity measurements and the K2 light curve leads to
masses of M1=1.509-0.056+0.063M☉ and
M2=0.649-0.014+0.015M☉ for the primary and secondary, along
with radii of R1=2.505-0.031+0.026R☉ and
R2=0.652-0.012+0.013R☉, respectively. The effective
temperatures are 6180±100K for the F7 primary and 4010±170K for
the late K secondary. The orbit is circular, and the stars' rotation
appears to be synchronized with the orbital motion. This is the third
eclipsing system analyzed in the same cluster, following our earlier
studies of EPIC 219394517 and EPIC 219568666. By comparison with
stellar evolution models from the PARSEC series, we infer an age of
2.67-0.55+0.39Gyr that is consistent with the estimates for the
other two systems. EPIC 219552514 is a hierarchical triple system,
with the period of the slightly eccentric outer orbit being 463 days.
The unseen tertiary is either a low-mass M dwarf or a white dwarf.
Description:
EPIC 219552514 was observed by the K2 mission during its Campaign 7,
as part of a large super-aperture targeting the core of Ruprecht 147.
The observations were made in long-cadence mode, once every 29.4min.
We downloaded the superstamp observations from the Mikulski Archive
for Space Telescopes (MAST). See Section 2.1.
EPIC 219552514 was monitored spectroscopically at the Center for
Astrophysics for three years beginning in 2016 September, with the
fiber-fed, bench-mounted Tillinghast Reflector Echelle Spectrograph
attached to the 1.5m Tillinghast reflector at the Fred L. Whipple
Observatory on Mount Hopkins (Arizona, USA). We collected a total of
43 spectra, at a resolving power of R∼44000 and covering the
wavelength region 3800-9100Å in 51 orders.
Objects:
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RA (ICRS) DE Designation(s)
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19 16 22.33 -16 27 50.7 EPIC 219552514 = TYC 6296-1893-1
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 21 3705 Detrended K2 photometry of EPIC 219552514
table2.dat 49 43 Heliocentric radial-velocity measurements
of EPIC 219552514
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See also:
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
II/312 : GALEX-DR5 (GR5) sources from AIS and MIS (Bianchi+ 2011)
IV/34 : K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
J/ApJ/469/355 : Teff, B-V and BC relation (Flower, 1996)
J/AJ/124/1144 : Orbits of 171 single-lined sp. binaries (Latham, 2002)
J/A+A/450/681 : Companions to close sp. binaries (Tokovinin+, 2006)
J/A+A/512/A54 : Teff and Fbol from Infrared Flux Method (Casagrande+, 2010)
J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)
J/A+A/529/A75 : Limb-darkening coefficients (Claret+, 2011)
J/ApJ/742/123 : Photometry and Velocity of LSPM J1112+7626 (Irwin+, 2011)
J/AJ/145/134 : Radial velocities of stars in Ruprecht 147 (Curtis+, 2013)
J/MNRAS/454/2863 : Teff against colours calibrations (Huang+, 2015)
J/AJ/152/8 : Stellar multiplicity of planetary systems I. (Kraus+, 2016)
J/ApJS/222/14 : Planetary cand. from 1st yr K2 mission (Vanderburg+, 2016)
J/MNRAS/472/1618 : Kepler study of starspot lifetimes (Giles+, 2017)
J/ApJ/836/177 : RVs and R-band obs. of the EB* V541 Cyg (Torres+, 2017)
J/AJ/155/173 : K2 light curve for K2-231 (Curtis+, 2018)
J/A+A/625/A115 : Ruprecht 147 DANCe. I. (Olivares+, 2019)
J/ApJ/887/109 : EBs in Ruprecht 147. II. EPIC 219568666 (Torres+, 2019)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 F10.4 d HJD [57301.48/57382.81] Heliocentric Julian Date;
HJD-2400000
12- 21 F10.8 --- RFlux [0.91/1.01] Residual flux (1)
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Note (1): K2 photometry after removal of instrumental effects and
long-term drifts.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.4 d HJD [57647.6/58744.7] Heliocentric Julian Date;
HJD-2400000
12- 17 F6.2 km/s RV1 [-21.93/104.28] Primary radial velocity
19- 22 F4.2 km/s e_RV1 [0.19/0.42] Uncertainty in RV1 (1)
24- 29 F6.2 km/s RV2 [-98.09/182.93]? Secondary radial velocity
31- 35 F5.2 km/s e_RV2 [6.69/14.71]? Uncertainty in RV2 (1)
37- 42 F6.4 --- Inner [0.099/0.901] Inner phase (2)
44- 49 F6.4 --- Outer [0.073/0.982] Outer phase (2)
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Note (1): The final velocity uncertainties for our analysis result from scaling
the values listed here for the primary and secondary by the near
unity factors f1 and f2, respectively, from our global analysis
described in Section 3.
Note (2): Orbital phases for the inner orbit are counted from the reference
time of primary eclipse, and those for the outer orbit from the
corresponding time of periastron passage.
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History:
From electronic version of the journal
References:
Torres et al. Paper I. 2018ApJ...866...67T 2018ApJ...866...67T
Torres et al. Paper II. 2019ApJ...887..109T 2019ApJ...887..109T Cat. J/ApJ/887/109
Torres et al. Paper III. 2020ApJ...896..162T 2020ApJ...896..162T This catalog
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 02-Nov-2021