Stars and brown dwarfs in the sigma Orionis cluster: the Mayrit catalogue

Abstract

The young sigma Orionis cluster is an indispensable basis for understanding the formation and evolution of stars, brown dwarfs and planetary-mass objects. Our knowledge of its stellar population is, however, incomplete. I present the Mayrit catalogue, that comprises most of the stars and high-mass brown dwarfs of the cluster. The basis of this work is an optical-near infrared correlation between the 2MASS and DENIS catalogues in a circular area of radius 30 arcmin centred on the OB-type binary sigma Ori AB. The analysis is supported on a bibliographic search of confirmed cluster members with features of youth and on additional X-ray, mid-infrared and astrometric data. I list 241 sigma Orionis stars and brown dwarfs with known features of youth, 97 candidate cluster members (40 are new) and 115 back- and foreground sources in the survey area. The 338 cluster members and member candidates constitute the Mayrit catalogue. This catalogue is a suitable input for studying the spatial ditribution, multiplicity, properties and frequency of discs and the complete mass function of sigma Orionis.

arXiv commentaccepted for publication in A&A, section 14. Online catalogs and data

References in corpus (29)

• The USNO-B Catalog
• The SuperCOSMOS Sky Survey. Paper I: Introduction and Description
• Spitzer Space Telescope study of disks in the young $\sigma$ Orionis cluster
• Accretion in Young Stellar/Substellar Objects
• A Search for Very Low-mass Stars and Brown Dwarfs in the Young sigma Orionis Cluster
• Lithium and Halpha in stars and brown dwarfs of sigma Orionis
• Variability in ultra cool dwarfs: evidence for the evolution of surface features
• The Substellar Mass Function in sigma Orionis
• Rotation and accretion of very low mass objects in the SigmaOri cluster
• A Methane Isolated Planetary Mass Object in Orion
• Photometric Identification of the low-Mass Population of Orion OB1b I: The sigma Ori Cluster
• The ASCA Medium Sensitivity Survey (the GIS Catalog Project): Source Counts and Evidence for Emerging Population of Hard Sources
• The substellar mass function in sigma Orionis. II. Optical, near-infrared and IRAC/Spitzer photometry of young cluster brown dwarfs and planetary-mass objects
• The brightest stars of the sigma Orionis cluster
• Photometric variability of young brown dwarfs in the sigma Orionis open cluster
• XMM-Newton observations of the sigma Ori cluster. II. Spatial and spectral analysis of the full EPIC field
• No disks around low-mass stars and brown dwarfs in the young sigma Orionis cluster?
• Spatial distribution of stars and brown dwarfs in sigma Orionis
• S Ori 70: Just a Foreground Field Brown Dwarf?
• A search for substellar members in the Praesepe and sigma Orionis clusters
• Discovery of a very cool object with extraordinarily strong H(alpha) emission
• An L'-band survey for circumstellar disks around low-mass stars in the young sigma Orionis cluster
• Contamination and exclusion in the sigma Orionis young group
• S Ori J053825.4-024241: A Classical T Tauri-like object at the substellar boundary
• Activity at the Deuterium-Burning Mass Limit in Orion
• Circumstellar discs in the young sigma Orionis cluster
• Discovery of a dust cloud next to sigma Orionis
• Are isolated planetary-mass objects really isolated? A brown dwarf-exoplanet system candidate in the sigma Orionis cluster
• Mid-infrared observations of young stellar objects in the vicinity of sigma Orionis

Cited by in corpus (43)

• An ALMA Survey of Protoplanetary Disks in the $\sigma$ Orionis Cluster
• Protoplanetary disc truncation mechanisms in stellar clusters: comparing external photoevaporation and tidal encounters
• X-Shooter spectroscopy of young stellar objects: II. Impact of chromospheric emission on accretion rate estimates
• New isolated planetary mass objects and the stellar and substellar mass function of the sigma Orionis cluster
• Precision photometric monitoring of very low mass Sigma Orionis cluster members: variability and rotation at a few Myr
• Disks around Brown Dwarfs in the Sigma Orionis Cluster
• Orbits, Distance, and Stellar Masses of the Massive Triple Star Sigma Orionis
• On the temporal evolution of the stellar mass function in Galactic clusters
• Candidate free-floating super-Jupiters in the young sigma Orionis open cluster
• Contamination by field late-M, L and T dwarfs in deep surveys
• A census of very-low-mass stars and brown dwarfs in the sigma Orionis cluster
• Orbital and physical properties of the $\sigma$ Ori Aa,Ab,B triple system
• A spectroscopic census in young stellar regions: the Sigma Orionis cluster
• A deep look into the cores of young clusters I. sigma-Orionis
• The evolution of accretion in young stellar objects: Strong accretors at 3 - 10 Myr
• Young stars and brown dwarfs surrounding Alnilam (eps Ori) and Mintaka (del Ori)
• Chemical abundances of late-type pre-main sequence stars in the $\sigma$-Orionis cluster
• A third massive star component in the σ Orionis AB system
• The APOGEE-2 Survey of the Orion Star Forming Complex: I. Target Selection and Validation with early observations
• Optical and Near-Infrared Spectra of sigma Orionis Isolated Planetary-mass Objects
• Spectroscopic Assessment of WISE-based Young Stellar Object Selection
• A Pulsation Search Among Young Brown Dwarfs and Very Low Mass Stars
• Low-resolution spectroscopy and spectral energy distributions of selected sources towards sigma Orionis
• First large scale Herbig-Haro jet driven by a proto-brown dwarf
• A revisit to agglomerates of early-type Hipparcos stars
• Discovery of an old photoevaporating disk in sigma Orionis
• Stars and brown dwarfs in the sigma Orionis cluster. II. A proper motion study
• New deep XMM-Newton observations to the west of the sigma Orionis cluster
• Young brown dwarfs at high cadence: Warm Spitzer time series monitoring of very low mass Sigma Orionis cluster members
• Stars and brown dwarfs in the sigma Orionis cluster. IV. IDS/INT and OSIRIS/GTC spectroscopy and Gaia DR2 astrometry
• HRC-I/Chandra X-ray observations towards sigma Orionis
• X-ray variability of sigma Orionis young stars with ROSAT
• ALMA reveals a pseudo-disc in a proto-brown dwarf
• XMM-Newton observations of the young open cluster around lambda Orionis
• A TGAS/Gaia DR1 parallactic distance to the sigma Orionis cluster
• Stars and brown dwarfs in the sigma Orionis cluster. III. OSIRIS/GTC low-resolution spectroscopy of variable sources
• The NEMESIS Catalogue of Young Stellar Objects for the Orion Star Formation Complex. I. General description of data curation
• A transitional disk around an intermediate mass star in the sparse population of the Orion OB1 Association
• Wide sigma Orionis binaries resolved by UKIDSS
• Finding the most variable stars in the Orion Belt with the All Sky Automated Survey
• Formation, evolution and multiplicity of brown dwarfs and giant exoplanets
• A deep staring campaign in the Sigma Orionis cluster. Variability in substellar members
• A review on substellar objects beyond the deuterium burning mass limit: planets, brown dwarfs or what?