Photometric study of HD 155555 C in the Pictoris Association
arXiv:1502.02395 · doi:10.1016/j.newast.2014.12.007
Abstract
We are carrying out a series of photometric monitoring to measure the rotation periods of members in the young Pictoris Association, as part of the RACE-OC project (Rotation and ACtivity Evolution in Open Clusters). In this paper, we present the results for HD 155555C which is believed to be physically associated to the spectroscopic binary V824 Ara (HD155555) and thus constituting a triple system. We collected B, V, and R-band photometric data timeseries and discovered from periodogram analysis the rotation period P = 4.43d. Combined with stellar radius and projected rotational velocity, we find this star almost equator-on with an inclination 90. The rotational properties of HD155555C fit well into the period distribution of other Pic members, giving further support to the suggested membership to the association and to its physical association to V824 Ara. A comparison with Pre-Main-Sequence isochrones from various models allows us to estimate an age of 2015 Myr for this triple system.
arXiv comment16 pages, 7 figures
References in corpus (23)
- Validation of the new Hipparcos reduction
- Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
- The USNO-B Catalog
- Models of Stars, Brown Dwarfs and Exoplanets
- The first WASP public data release
- Bayesian analysis to identify new star candidates in nearby young stellar kinematic groups
- Search for Associations Containing Young stars (SACY): I. Sample & Searching Method
- The Gemini NICI Planet-Finding Campaign: The Frequency of Planets around Young Moving Group Stars
- A search for hot massive extrasolar planets around nearby young stars with the adaptive optics system NACO
- Identifying the young low-mass stars within 25 pc. II. Distances, kinematics and group membership
- A rotational and variability study of a large sample of PMS stars in NGC 2264
- Variability in ultra cool dwarfs: evidence for the evolution of surface features
- Lithium Depletion of Nearby Young Stellar Associations
- RACE-OC Project: Rotation and variability in young stellar associations within 100 pc
- RACE-OC Project: Rotation and variability in the epsilon Chamaeleontis, Octans, and Argus stellar associations
- Rotational velocities of nearby young stars
- Nearby young stars selected by proper motion. I. Four new members of the Beta Pictoris moving group from the Tycho-2 catalog
- Likely Members of the Beta Pictoris and AB Doradus Moving Groups in the North
- A search for new members of the beta Pic, Tuc-Hor and epsilon Cha moving groups in the RAVE database
- Long-term magnetic activity in close binary systems. I. Patterns of color variations
- Differential rotation on both components of the pre main-sequence binary system HD 155555
- SIM PlanetQuest Key Project Precursor Observations to Detect Gas Giant Planets Around Young Stars
- Evidence from stellar rotation of enhanced disc dispersal: (I) The case of the triple visual system BD-21 1074 in the Pictoris association