J/AJ/158/82 DS Andromedae radial velocity & photometric data (Milone+, 2019)
DS Andromedae: a detached eclipsing double-lined spectroscopic binary
in the galactic cluster NGC 752.
Milone E.F., Schiller S.J., Mellergaard Amby T., Frandsen S.
<Astron. J., 158, 82-82 (2019)>
=2019AJ....158...82M 2019AJ....158...82M (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Binaries, eclipsing ; Radial velocities ;
Photometry, UBVRI
Keywords: binaries: eclipsing - binaries: spectroscopic -
open clusters and associations: individual: NGC 752 -
stars: individual: DS And
Abstract:
The Wilson-Devinney program has been used to analyze well-calibrated
photometric and new radial velocity data to determine the properties
and distance of DS Andromedae, a 1.01 day period, double-lined, totally
eclipsing binary system of early-F spectral type and a likely member
of the intermediate-age open cluster NGC 752. The determinations of many
of the system elements including the distance are robust against modest
changes in model assumptions. Third light is present in all passbands
at the 10% level. The weighted means of the best-fitting model yield a
distance of 477±4±12 pc, equivalent to
(m-M)0=8.390±0.018±0.060 mag, and masses of
1.655±0.003±0.030 MSun and 1.087±0.005±0.040 MSun, radii
of 2.086±0.003±0.013 and 1.255±0.005±0.012 RSun, and effective
temperatures 7056±21±140 RSun and 5971±33±130 K, for
components 1 and 2, respectively, where the formal internal uncertainties
are followed by conservatively estimated systematic errors. Possible but
less satisfactory semidetached models produce more parameter variations
and larger mean residuals. The primary star is seen to be at or very close
to the main-sequence turnoff at an age of 1.55±0.05 Gyr but appears
to be too small for its mass, whereas the secondary appears to be too
luminous for its temperature and too large for its mass compared to
models of single stars.
Description:
The Mellergaard Amby (2011, see Amby Ottosen, Th. 2011) data are
listed in Table 1. The spectra were obtained with the Nordic Optical
Telescope and the FIES spectrograph in the medium-resolution (R=46000)
mode (http://www.not.iac.es/instruments/fies/).
The BVRCIC data described previously in Schiller & Milone
(1988AJ.....95.1466S 1988AJ.....95.1466S), and a much smaller number of U observations,
constitute the photometric data we used for the current analyses. All
are photoelectric data. The photometry was obtained by S.J.S. in the
1982-83 observing season at the Rothney Astrophysical Observatory (RAO)
in Alberta, the McDonald Observatory (McDO) in Texas, and the Table
Mountain Observatory (TMO) in California, over the HJD intervals 2445243.8
to 2445384.8, 2445600.8 to 2445604.0, and 2445683.6 to 2445683.8,
respectively. The RAO data are differential, obtained with the chopped,
gated pulse-counting photoelectric setup designated RADS, for Rapid
Alternate Detection System. The number of RADS observations made in each
passband were 150, 193, 354, and 197 in IC, RC, V, and B, respectively.
The five-filter McDO and TMO data were obtained on larger telescopes
(90 and 60 cm, respectively) in darker and more photometric conditions,
yielding a typical m.s.e. of a single observation of about 0.005 mag.
There are 145 observations in each of the IC, RC, V, and B passbands,
and 94 in U. The reduced, systemic data were standardized to the
Johnson-Cousins system through observations at each site of stars in
the standard star lists of Landolt (1983, Cat. II/118).
The complete set of IC, RC, V, B, and U data are listed in Table 15
and is available in the Zenodo repository package 10.5281/zenodo.2553042.
Objects:
-------------------------------------------------------
RA (ICRS) DE Designation(s)
-------------------------------------------------------
01 57 46.06 +38 04 28.4 V* DS And = DS And
01 57 41 +37 47.1 NGC 752 = Cl Melotte 12
-------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 26 14 DS Andromedae radial velocity data
table15.dat 129 499 DS Andromedae photometric data
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See also:
II/118 : UBVRI standards around Celestial Equator (Landolt 1983)
J/PASP/106/281 : Photometry and radial velocities in NGC752 (Daniel+, 1994)
J/ApJS/176/262 : VRI photometry and theta values in open clusters
(Taylor+, 2008)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian Date
14- 19 F6.1 km/s RV1 [-106.4/127.6] Primary radial velocity
21- 26 F6.1 km/s RV2 [-169.6/186.3] Secondary radial velocity
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Byte-by-byte Description of file: table15.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD-Ic ? Heliocentric Julian Date for IC passband
14- 19 F6.3 mag Icmag [9.91/10.436]? Cousins IC band magnitude
21- 25 F5.3 --- w_Icmag [0.239/1]? Weight for IC passband
27- 38 F12.4 d HJD-Rc ? Heliocentric Julian Date for RC passband
40- 45 F6.3 mag Rcmag [10.178/10.704]? Cousins RC band magnitude
47- 51 F5.3 --- w_Rcmag [0.157/1]? Weight for RC passband
53- 64 F12.4 d HJD-V Heliocentric Julian Date for V passband
66- 71 F6.3 mag Vmag [10.403/10.955] Johnson V band magnitude
73- 77 F5.3 --- w_Vmag [0.093/1] Weight for V passband
79- 90 F12.4 d HJD-B ? Heliocentric Julian Date for B passband
92- 97 F6.3 mag Bmag [10.782/11.372]? Johnson B band magnitude
99-103 F5.3 --- w_Bmag [0.088/1]? Weight for B passband
105-116 F12.4 d HJD-U ? Heliocentric Julian Date for U passband
118-123 F6.3 mag Umag [10.844/11.369]? Johnson U band magnitude
125-129 F5.3 --- w_Umag [1]? Weight for U passband
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History:
From electronic version of the journal
(End) Tiphaine Pouvreau [CDS] 25-Nov-2019