J/MNRAS/441/343 Highly eccentric detached eclipsing binaries (Shivvers+, 2014)
The highly eccentric detached eclipsing binaries in ACVS and MACC.
Shivvers I., Bloom J.S., Richards J.W.
<Mon. Not. R. Astron. Soc., 441, 343-353 (2014)>
=2014MNRAS.441..343S 2014MNRAS.441..343S
ADC_Keywords: Binaries, eclipsing ; Radial velocities
Keywords: techniques: spectroscopic - catalogues - binaries: eclipsing
Abstract:
Next-generation synoptic photometric surveys will yield unprecedented
(for the astronomical community) volumes of data and the processes of
discovery and rare-object identification are, by necessity, becoming
more autonomous. Such autonomous searches can be used to find objects
of interest applicable to a wide range of outstanding problems in
astronomy, and in this paper we present the methods and results of a
largely autonomous search for highly eccentric detached eclipsing
binary systems in the Machine-learned All-Sky Automated Survey
Classification Catalog. 106 detached eclipsing binaries with
eccentricities of e≳0.1 are presented, most of which are identified
here for the first time. We also present new radial-velocity curves
and absolute parameters for six of those systems with the long-term
goal of increasing the number of highly eccentric systems with orbital
solutions, thereby facilitating further studies of the tidal
circularization process in binary stars.
Description:
This study utilized the MACC presented by Richards et al.
(2012ApJS..203...32R 2012ApJS..203...32R, Cat. J/ApJS/203/32), which provides a rich and
publicly available data set of probabilistic classifications for
objects in the ACVS (Pojmanski & Maciejewski, 2004AcA....54..153P 2004AcA....54..153P,
Cat. II/264).
As part of this project, we took a set of high-resolution spectra of
six systems to measure their RV curves and model the properties of
their component stars. Systems were chosen for RV followup based on
their estimated eccentricity and brightness as well as telescope
availability. All six of the systems with RV curves presented here are
double-lined spectroscopic binaries. Spectra for ASAS objects
205642+1153.0 and 193043-0615.6 were obtained with the Hamilton
Echelle Spectrograph (HES) mounted at the Coude focus of Lick
Observatory's Shane 3m telescope.
Spectra for ASAS objects 091704-5454.1, 073611-3123.4,
064057-2637.6 and 112145-0850.2 were obtained with the CHIRON
spectrograph mounted on the Small and Medium Aperture Research
Telescope System (SMARTS) 1.5m telescope at the Cerro Tololo
Inter-American Observatory (CTIO).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 73 6 Systems with new radial velocities
table1.dat 62 42 *Journal of spectroscopic observations of 6 systems
table3.dat 112 34 New RVs for six systems
table2.dat 60 106 *106 eccentric eclipsing binaries in ASAS/MACC
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Note on table1.dat:. A log of the spectroscopic observations obtained for this
project. Data were collected on the SMARTS 1.5m telescope at CTIO (CHIRON) or
on the 3m Shane telescope at Mt Hamilton (HES). Note that observations of the
RV standard HD 182488 were taken with widely varying exposure times on
different nights. Different exposures exhibit different signal levels, but all
are high enough quality to perform cross-correlation and none are saturated.
For all HES spectra we chose to use the standard observations taken the same
night as science observations.
Note on table2.dat: The 106 high-e systems identified in this paper, with
accurate periods and eccentricity estimates as determined by light-curve
fits with the DEBIL code.
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See also:
II/264 : ASAS Variable Stars in Southern hemisphere (Pojmanski+ 2002-05)
J/ApJS/203/32 : Machine-learned ASAS Classification Cat., MACC (Richards+ 2012)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [ASAS]
6- 18 A13 --- ASAS ASAS name (HHMMSS+DDMM.m, J2000)
20- 21 I2 h RAh Simbad Right ascension (J2000)
23- 24 I2 min RAm Simbad Right ascension (J2000)
26- 30 F5.2 s RAs Simbad Right ascension (J2000)
32 A1 --- DE- Simbad Declination sign (J2000)
33- 34 I2 deg DEd Simbad Declination (J2000)
36- 37 I2 arcmin DEm Simbad Declination (J2000)
39- 42 F4.1 arcsec DEs Simbad Declination (J2000)
44- 50 F7.4 d Per Period (from table 4 of the paper)
52- 57 F6.4 d e_Per rms uncertainty on Per (from table 4 of the paper)
59- 73 A15 --- OName Other name
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "YYYY/MM/DD" Obs.date UT date of observation
12- 22 A11 "h:m:s" Obs.time Time of observation
24- 27 A4 --- Cat Catalog: "ASAS" or "HD" (1)
29- 41 A13 --- ASAS ASAS name (HHMMSS+DDMM.m) or HD number (1)
43- 48 A6 --- Inst Instrument (HES or CHIRON)
50- 53 I4 0.1nm lam.min Lower value of wavelength range (Å)
54 A1 --- --- [-]
55- 58 I4 0.1nm lam.max Upper value of wavelength range (Å)
60- 62 I3 s Texp Exposure time
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Note (1): In addition to the 6 ASAS stars, the 2 standard stars
HD 182488 and HD 75289.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [ASAS]
6- 18 A13 --- ASAS ASAS name (JHHMMSS+DDMM.m)
20- 29 A10 "date" ObsDate UT date of observation
31- 41 A11 "h:m:s" ObsTime Time of observation
43- 47 F5.1 km/s RV1 Primary radial velocity (1)
49- 52 F4.2 km/s e_RV1 rms uncertainty on RV1 (1)
53 A1 --- n_RV1 [c] Note on RV1 (1)
54- 59 F6.1 km/s RV2 ?=- Secondary radial velocity (1)
61- 64 F4.2 km/s e_RV2 ? rms uncertainty on RV2 (1)
66- 74 A9 --- Std Standard star name
76- 80 F5.1 km/s RVStd1 First radial velocity of standard star
82- 85 F4.2 km/s e_RVStd1 rms uncertainty on RVStd1
86 A1 --- r_RVStd1 [ab] Reference of RVStd1 (2)
88- 92 F5.2 --- BCC Star binary cross-correlation parameter
94- 98 F5.2 --- BCCStd Standard star binary cross-correlation
parameter
100-112 F13.5 d HJD Heliocentric Julian date
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Note (1): RVs for science and standard targets used in this project, as
described in Section 4. Epochs observed near eclipse (line-blended spectra)
are listed with only a single RV measurement.
Note (2): Notes as follows:
a = Valenti & Fisher (2005ApJS..159..141V 2005ApJS..159..141V, Cat. J/ApJS/159/141)
b = Nidever et al. (2002ApJS..141..503N 2002ApJS..141..503N, Cat. J/ApJS/141/503)
c = Spurious point; disregarded in PHOEBE fit
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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 A13 --- ASAS ASAS name (HHMMSS+DDMM.d)
14 A1 --- n_ASAS [a] new RV curve: detailed models presented
in Section 4.
16- 17 I2 h RAh Right ascension (J2000)
19- 20 I2 min RAm Right ascension (J2000)
22- 27 F6.3 s RAs Right ascension (J2000)
29 A1 --- DE- Declination sign (J2000)
30- 31 I2 deg DEd Declination (J2000)
33- 34 I2 arcmin DEm Declination (J2000)
36- 40 F5.2 arcsec DEs Declination (J2000)
42- 49 F8.4 d Per Period (characteristic errors about ±0.006d)
51- 54 F4.2 --- e [0.1/0.64] Eccentricity
56- 60 F5.3 --- e_e rms uncertainty on e
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 02-Feb-2015