The Effect of Starspots on Accurate Radius Determination of the Low-Mass Double-Lined Eclipsing Binary Gu Boo

@article{Windmiller2010TheEO,
  title={The Effect of Starspots on Accurate Radius Determination of the Low-Mass Double-Lined Eclipsing Binary Gu Boo},
  author={Gur Windmiller and Jerome A. Orosz and Paul Bernard Etzel},
  journal={The Astrophysical Journal},
  year={2010},
  volume={712},
  pages={1003-1009}
}
GU Boo is one of only a relatively small number of well-studied double-lined eclipsing binaries that contain low-mass stars. Lopez-Morales and Ribas present a comprehensive analysis of multi-color light and radial velocity curves for this system. The GU Boo light curves presented by Lopez-Morales and Ribas had substantial asymmetries, which were attributed to large spots. In spite of the asymmetry, Lopez-Morales and Ribas derived masses and radii accurate to {approx_equal}2%. We obtained… Expand

Figures and Tables from this paper

Possible substellar companions in low-mass eclipsing binaries: GU Bootis and YY Geminorum
We present the next results of our long-term observational project to analyze the variations in the orbital periods of low-mass eclipsing binaries. About 70 new precise mid-eclipse times recordedExpand
Fundamental properties of the pre-main sequence eclipsing stars of MML 53 and the mass of the tertiary
We present the most comprehensive analysis to date of the Upper Centaurus Lupus eclipsing binary MML 53 (with PEB = 2.097892 d), and for the first time, confirm the bound-nature of the third star (inExpand
Physical Properties of the Low-Mass Eclipsing Binary NSVS 02502726
NSVS 02502726 has been known as a double-lined, detached eclipsing binary that consists of two low-mass stars. We obtained $BVRI$ photometric follow-up observations in 2009 and 2011 to measureExpand
Theoretical uncertainties on the radius of low- and very-low-mass stars
We performed an analysis of the main theoretical uncertainties that affect the radius of low- and very-low mass-stars predicted by current stellar models. We focused on stars in the mass rangeExpand
The Mass-Radius(-Rotation?) Relation for Low-Mass Stars
The fundamental properties of low-mass stars are not as well understood as those of their more massive counterparts. The best method for constraining these properties, especially masses and radii, isExpand
The radius inflation problem in short-period low-mass binaries: a large sample analysis
Due to the recent increase in the availability of photometric time-series databases, the characterisation of low-mass eclipsing binaries for the study of their orbital and physical parameters is nowExpand
REEVALUATING THE MASS-RADIUS RELATION FOR LOW-MASS, MAIN-SEQUENCE STARS
We examine the agreement between the observed and theoretical low-mass (<0.8 M ☉) stellar main-sequence mass-radius relationship by comparing detached eclipsing binary (DEB) data with a new, largeExpand
Fundamental properties of lower main-sequence stars
The field of exoplanet research has revitalized interest in M dwarfs, which have become favorite targets of Doppler and transit surveys. Accurate measurements of their basic properties such asExpand
The Dwarf project: Eclipsing binaries – precise clocks to discover exoplanets
We present a new observational campaign, Dwarf, aimed at detection of circumbinary extrasolar planets using the timing of the minima of low-mass eclipsing binaries. The observations will be performedExpand
Fundamental properties of low-mass stars in eclipsing binary systems
Eclipsing binary systems offer a unique opportunity to accurately measure the fundamental properties of stars. In the past years, masses and radii of low-mass stars in these systems have beenExpand
...
1
2
3
...

References

SHOWING 1-10 OF 24 REFERENCES
GJ 3236: A New Bright, Very Low Mass Eclipsing Binary System Discovered by the MEARTH Observatory
We report the detection of eclipses in GJ 3236, a bright (I = 11.6), very low mass binary system with an orbital period of 0.77 days. Analysis of light and radial velocity curves of the systemExpand
Absolute Dimensions of the M-Type Eclipsing Binary YY Geminorum (Castor C): A Challenge to Evolutionary Models in the Lower Main Sequence*
We present new spectroscopic observations of the detached late-type double-lined eclipsing binary YY Geminorum (P = 0.814 day), a member of the Castor sextuple system and one of the benchmarks forExpand
A new low-mass eclipsing binary: NSVS 02502726
Abstract We present optical spectroscopy and extensive RI differential photometry of the double-lined eclipsing binary NSVS 02502726 (2MASS J08441103+5423473). Simultaneous solution of two-band lightExpand
GU Bootis: A New 0.6 M☉ Detached Eclipsing Binary
We have found a new low-mass, double-lined, detached eclipsing binary, GU Boo, among a sample of new variables from the ROTSE-I database. The binary has an orbital period of 0.488728 ± 0.000002 daysExpand
2MASS J0516288+260738: Discovery of the first eclipsing late K + Brown dwarf binary system?
We report the discovery of a new eclipsing system less than one arcminute south of the pulsating DB white dwarf KUV 05134+2605. The object could be identified with the point source 2MASSExpand
Evolution of low-mass star and brown dwarf eclipsing binaries
Context. We examine the evolution of low-mass star and brown dwarf eclipsing binaries. These objects are rapid rotators and are believed to shelter large magnetic fields. Aims. We suggest thatExpand
On the Correlation between the Magnetic Activity Levels, Metallicities, and Radii of Low-Mass Stars
The recent increase in the number of radius measurements of very low mass stars from eclipsing binaries and interferometry of single stars has raised more questions about what could be causing theExpand
A New Detached M Dwarf Eclipsing Binary
We describe a newly discovered detached M dwarf eclipsing binary system. This system was first observed by the TrES network during a long-term photometry campaign of 54 nights. Analysis of the foldedExpand
THE ECLIPSING BINARY V1061 CYGNI: CONFRONTING STELLAR EVOLUTION MODELS FOR ACTIVE AND INACTIVE SOLAR-TYPE STARS
We present spectroscopic and photometric observations of the eclipsing system V1061 Cyg (P = 2.35 days). A third star is visible in the spectrum, and the system is a hierarchical triple. We combineExpand
Dynamical Evidence for a Black Hole in the Microquasar XTE J1550-564
Optical spectroscopic observations of the companion star (type G8 IV to K4 III) in the microquasar system XTE J1550-564 reveal a radial velocity curve with a best-fitting spectroscopic period of PspExpand
...
1
2
3
...