LSPM J1112+7626: detection of a 41-day M-dwarf eclipsing binary from the MEarth transit survey

Abstract

We report the detection of eclipses in LSPM J1112+7626, which we find to be a moderately bright (I_C = 12.14 +/- 0.05) very low-mass binary system with an orbital period of 41.03236 +/- 0.00002 days, and component masses M_1 = 0.395 +/- 0.002 Msol and M_2 = 0.275 +/- 0.001 Msol in an eccentric (e = 0.239 +/- 0.002) orbit. A 65 day out of eclipse modulation of approximately 2% peak-to-peak amplitude is seen in I-band, which is probably due to rotational modulation of photospheric spots on one of the binary components. This paper presents the discovery and characterization of the object, including radial velocities sufficient to determine both component masses to better than 1% precision, and a photometric solution. We find that the sum of the component radii, which is much better-determined than the individual radii, is inflated by 3.8 +0.9 -0.5 % compared to the theoretical model predictions, depending on the age and metallicity assumed. These results demonstrate that the difficulties in reproducing observed M-dwarf eclipsing binary radii with theoretical models are not confined to systems with very short orbital periods. This object promises to be a fruitful testing ground for the hypothesized link between inflated radii in M-dwarfs and activity.

23 pages, 11 figures, 12 tables, emulateapj format. Accepted for publication in ApJ

References in corpus (12)

• Constraining the Age-Activity Relation for Cool Stars: The SDSS DR5 Low-Mass Star Spectroscopic Sample
• Stellar SEDs from 0.3-2.5 Microns: Tracing the Stellar Locus and Searching for Color Outliers in SDSS and 2MASS
• Evolution of low-mass star and brown dwarf eclipsing binaries
• The Stellar Populations of Praesepe and Coma Berenices
• KOI-126: A Triply-Eclipsing Hierarchical Triple with Two Low-Mass Stars
• M dwarfs: effective temperatures, radii and metallicities
• Absolute properties of the low-mass eclipsing binary CM Draconis
• First Results from the CHARA Array. IV. The Interferometric Radii of Low-Mass Stars
• The transiting exoplanet host star GJ 436: a test of stellar evolution models in the lower main sequence, and revised planetary parameters
• The Monitor project: Data processing and lightcurve production
• Accurate M Dwarf Metallicities from Spectral Synthesis: A Critical Test of Model Atmospheres
• T-Lyr1-17236: A Long-Period Low-Mass Eclipsing Binary

Cited by in corpus (109)

• Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
• MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
• Efficient, uninformative sampling of limb darkening coefficients for two-parameter laws
• How to Constrain Your M Dwarf: measuring effective temperature, bolometric luminosity, mass, and radius
• Improving PARSEC models for very low mass stars
• Stellar Diameters and Temperatures II. Main Sequence K & M Stars
• Metallicity and Temperature Indicators in M dwarf K band Spectra: Testing New & Updated Calibrations With Observations of 133 Solar Neighborhood M dwarfs
• How to Constrain Your M dwarf II: the mass-luminosity-metallicity relation from 0.075 to 0.70$M_{\odot }$
• The Flat Transmission Spectrum of the Super-Earth GJ1214b from Wide Field Camera 3 on the Hubble Space Telescope
• The Habitability of Planets Orbiting M-dwarf Stars
• The Next Generation Transit Survey (NGTS)
• Detection of carbon monoxide in the high-resolution day-side spectrum of the exoplanet HD 189733b
• Characterizing the Cool KOIs III. KOI-961: A Small Star with Large Proper Motion and Three Small Planets
• Near-infrared Metallicities, Radial Velocities and Spectral Types for 447 Nearby M Dwarfs
• exoplanet: Gradient-based probabilistic inference for exoplanet data & other astronomical time series
• The CARMENES search for exoplanets around M dwarfs: Different roads to radii and masses of the target stars
• Prospecting in late-type dwarfs: a calibration of infrared and visible spectroscopic metallicities of late-K and M dwarfs spanning 1.5 dex
• Transit Detection in the MEarth Survey of Nearby M Dwarfs: Bridging the Clean-First, Search-Later Divide
• An Activity-Rotation Relationship and Kinematic Analysis of Nearby Mid-to-Late-type M Dwarfs
• Magnetic Inhibition of Convection and the Fundamental Properties of Low-Mass Stars. I. Stars with a Radiative Core
• HATS-6b: A Warm Saturn Transiting an Early M Dwarf Star, and a Set of Empirical Relations for Characterizing K and M Dwarf Planet Hosts
• The solar-type eclipsing binary system LL Aquarii
• The scatter of the M dwarf mass-radius relationship
• Magnetic Inhibition of Convection and the Fundamental Properties of Low-Mass Stars. II. Fully Convective Main Sequence Stars
• An Empirical Correction for Activity Effects on the Temperatures, Radii, and Estimated Masses of Low-Mass Stars and Brown Dwarfs
• The GJ 436 System: Directly Determined Astrophysical Parameters of an M-Dwarf and Implications for the Transiting Hot Neptune
• New low-mass eclipsing binary systems in Praesepe discovered by K2
• Self-Consistent Magnetic Stellar Evolution Models of the Detached, Solar-Type Eclipsing Binary EF Aquarii
• Magnetic Inflation and Stellar Mass II: On the Radii of Single, Rapidly Rotating, Fully Convective M Dwarf Stars
• Constraints on Planet Occurrence around Nearby Mid-to-Late M Dwarfs from the MEarth Project
• The Mass-Radius Relationship for Very Low Mass Stars: Four New Discoveries from the HATSouth Survey
• Discovery and characterisation of detached M-dwarf eclipsing binaries in the WFCAM Transit Survey
• The TESS light curve of AI Phoenicis
• Stellar Characterization of M-dwarfs from the APOGEE Survey: A Calibrator Sample for the M-dwarf Metallicities
• CoRoT 223992193: A new, low-mass, pre-main sequence eclipsing binary with evidence of a circumbinary disk
• A Low-Mass Exoplanet Candidate Detected By $K2$ Transiting the Praesepe M Dwarf JS 183
• The CARMENES search for exoplanets around M dwarfs: Nine new double-line spectroscopic binary stars
• A highly unequal-mass eclipsing M-dwarf binary in the WFCAM Transit Survey
• A Long-Period Totally Eclipsing Binary Star at the Turnoff of the Open Cluster NGC 6819 Discovered with Kepler
• Calibration of the MEarth Photometric System: Optical Magnitudes and Photometric Metallicity Estimates for 1802 Nearby M-dwarfs
• Magnetic effects and oversized M dwarfs in the young open cluster NGC 2516
• Four new eclipsing mid M-dwarf systems from the New Luyten Two Tenths catalog
• The EBLM project. II. A very hot, low-mass M dwarf in an eccentric and long period eclipsing binary system from SuperWASP
• Kepler Studies of Low-Mass Eclipsing Binaries I. Parameters of the Long-Period Binary KIC 6131659
• The Metallicity of the CM Draconis System
• Centroid vetting of transiting planet candidates from the Next Generation Transit Survey
• KIC 1571511B: A Benchmark Low-Mass Star In An Eclipsing Binary System In The Kepler Field
• Qatar-1: indications for possible transit timing variations
• The Factory and the Beehive III: PTFEB132.707+19.810, a Low-Mass Eclipsing Binary in Praesepe Observed by PTF and K2
• Theoretical limits on magnetic field strengths in low-mass stars
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue - IV. A 0.61 + 0.45 M_sun binary in a multiple system
• Magnetic Inflation and Stellar Mass I: Revised Parameters for the Component Stars of the Kepler Low-mass Eclipsing Binary T-Cyg1-12664
• Unmasking the hidden NGTS-3Ab: a hot Jupiter in an unresolved binary system
• Discovery and Precise Characterization by the MEarth Project of LP 661-13, an Eclipsing Binary Consisting of Two Fully Convective Low-mass Stars
• Masses and radii of four very low mass stars in F+M eclipsing binary systems
• Eclipsing binaries in the open cluster Ruprecht 147. I: EPIC 219394517
• Transit and Radial Velocity Survey Efficiency Comparison for a Habitable Zone Earth
• The EBLM project -- VIII. First results for M-dwarf mass, radius and effective temperature measurements using CHEOPS light curves
• An eclipsing double-line spectroscopic binary at the stellar/substellar boundary in the Upper Scorpius OB association
• Efficient, uninformative sampling of limb-darkening coefficients for a three-parameter law
• Detection of a very low mass star in an Eclipsing Binary system
• Magnetic Inflation and Stellar Mass IV. Four Low-mass Kepler Eclipsing Binaries Consistent with Non-magnetic Stellar Evolutionary Models
• Spectroscopic Orbits of Eleven Nearby, Mid-to-Late M Dwarf Binaries
• A Bright Short Period M-M Eclipsing Binary from the KELT Survey: Magnetic Activity and the Mass-Radius Relationship for M-dwarfs
• LHS 1610A: A Nearby Mid-M Dwarf with a Companion That is Likely A Brown Dwarf
• The Eclipsing Binaries from the LAMOST Medium-resolution Survey.III. A High-precision Empirical Stellar Mass Library
• Absolute dimensions of the eccentric eclipsing binary V541 Cygni
• A transiting companion to the eclipsing binary KIC002856960
• Measuring Model-independent Masses and Radii of Single-Lined Eclipsing Binaries: Analytic Precision Estimates
• A refined analysis of the low-mass eclipsing binary system T-Cyg1-12664
• HAT-TR-318-007: a double-lined M-dwarf binary with total secondary eclipses discovered by HATNet and observed by K2
• The quadruple-lined, doubly-eclipsing system V482 Persei
• Fundamental Properties of Late-Type Stars in Eclipsing Binaries
• Orbital and physical parameters of eclipsing binaries from the All-Sky Automated Survey catalogue - X. Three high-contrast systems with secondaries detected with IR spectroscopy
• Measuring the variability of directly imaged exoplanets using vector Apodizing Phase Plates combined with ground-based differential spectrophotometry
• Mon-735: A new low-mass pre-main sequence eclipsing binary in NGC 2264
• NGTS clusters survey -- III: A low-mass eclipsing binary in the Blanco 1 open cluster spanning the fully convective boundary
• An eclipsing M-dwarf close to the hydrogen burning limit from NGTS
• Eclipsing binaries in the open cluster Ruprecht 147. III: The triple system EPIC 219552514 at the main-sequence turnoff
• Search for bright nearby M dwarfs with Virtual Observatory tools
• The radius inflation problem in short-period low-mass binaries: a large sample analysis
• Orbital and physical parameters of eclipsing binaries from the All-Sky Automated Survey catalogue - VI. AK Fornacis - a rare, bright K-type eclipsing binary
• Revised Stellar Parameters for V471 Tau, A Post-common Envelope Binary in the Hyades
• Detached eclipsing binaries from the Kepler field: radii and photometric masses of components in short-period systems
• Eclipsing binaries in the open cluster Ruprecht 147. II: EPIC 219568666
• A Low-Mass Pre-Main-Sequence Eclipsing Binary in Lower Centaurus Crux Discovered with TESS
• NGTS J214358.5-380102 -- NGTS discovery of the most eccentric known eclipsing M-Dwarf binary system
• Exploring the short-term variability of H$\alpha$ and H$\beta$ emissions in a sample of M dwarfs
• The SDSS-HET Survey of Kepler Eclipsing Binaries. Description of the Survey and First Results
• A Low-mass, Pre-main-sequence Eclipsing Binary in the 40 Myr Columba Association -- Fundamental Stellar Parameters and Modeling the Effect of Star Spots
• An M dwarf Companion to an F-type Star in a young main-sequence binary
• Eclipsing binaries in the open cluster Ruprecht 147. IV: The active triple system EPIC 219511354
• Photometric study of fourteen low-mass binaries
• Discovery and Characterization of a Rare Magnetic Hybrid $\beta$ Cephei Slowly Pulsating B-type Star in an Eclipsing Binary in the Young Open Cluster NGC 6193
• Magnetic Inflation and Stellar Mass III: Revised Parameters for the Component Stars of NSVS 07394765
• G 68-34: A Double-Lined M-Dwarf Eclipsing Binary in a Hierarchical Triple System
• Weighing stars from birth to death: mass determination methods across the HRD
• LSPM J1314: An oversized magnetic star with constraints on the radio emission mechanism
• An Eclipsing Binary Comprising Two Active Red Stragglers of Identical Mass and Synchronized Rotation: A Post-Mass-Transfer System or Just Born That Way?
• Characterization of low-mass companions to $\text{Kepler}$ objects of interest observed with APOGEE-N
• The complex dynamical past and future of double eclipsing binary CzeV343: misaligned orbits and period resonance
• SDSSJ1156-0207: A 0.54 M_sun + 0.19 M_sun Double-lined M Dwarf Eclipsing Binary System
• The first low-mass eclipsing binary within the fully convective zone from TMTS
• Absolute dimensions of the low-mass eclipsing binary system NSVS 10653195
• NGTS-EB-8: A double-lined eclipsing M+M binary discovered by citizen scientists
• Orbital characterization of GJ1108A system, and comparison of dynamical mass with model-derived mass for resolved binaries
• A Gyrochronology and Microvariability Survey of the Milky Way's Older Stars Using Kepler's Two-Wheels Program
• Absolute dimensions of the unevolved F-type eclipsing binary BT Vulpeculae
• A 2+1+1 quadruple star system containing the most eccentric, low-mass, short-period, eclipsing binary known