SIMP J2154-1055: A New Low-Gravity L4$\beta$ Brown Dwarf Candidate Member of the Argus Association

Abstract

We present SIMP J21543454-1055308, a new L4$\beta$ brown dwarf identified in the Sondage Infrarouge de Mouvement Propre (SIMP) survey that displays signs of low gravity in its near-infrared spectrum. Using the Bayesian Analysis for Nearby Young AssociatioNs II (BANYAN II), we show that it is a candidate member of the Argus association, albeit with a 21% probability that it is a contaminant from the field. Measurements of radial velocity and parallax will be needed to verify its membership. If it is a member of Argus (age 30-50 Myr), then this object would have a planetary mass of 10 $\pm$ 0.5 $M_{\mathrm{Jup}}$.

arXiv comment5 pages, 4 figures, accepted for publication in the ApJ Letters. Minor modifications to text and references

References in corpus (35)

• The Sloan Digital Sky Survey: Technical Summary
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• Direct Imaging of Multiple Planets Orbiting the Star HR 8799
• Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 20945
• A Method of Correcting Near-Infrared Spectra for Telluric Absorption
• A Giant Planet Candidate near a Young Brown Dwarf
• The SuperCOSMOS Sky Survey. Paper I: Introduction and Description
• A probable giant planet imaged in the Beta Pictoris disk
• Meeting the Cool New Neighbors V: A 2MASS-Selected Sample of Ultracool Dwarfs
• A Near-Infrared Spectroscopic Study of Young Field Ultracool Dwarfs
• Bayesian analysis to identify new star candidates in nearby young stellar kinematic groups
• Young L Dwarfs Identified in the Field: A Preliminary Low-Gravity, Optical Spectral Sequence from L0 to L5
• BANYAN. II. Very Low Mass and Substellar Candidate Members to Nearby, Young Kinematic Groups With Previously Known Signs of Youth
• Meeting the Cool Neighbors. IX. The Luminosity Function of M7-L8 Ultracool Dwarfs in the Field
• Direct Imaging of a Cold Jovian Exoplanet in Orbit around the Sun-like Star GJ 504
• Direct Imaging and Spectroscopy of a Planetary Mass Candidate Companion to a Young Solar Analog
• A Sample of Very Young Field L Dwarfs and Implications for the Brown Dwarf "Lithium Test" at Early Ages
• Four nearby L dwarfs
• Subtle Signatures of Multiplicity in Late-type Dwarf Spectra: The Unresolved M8.5 + T5 Binary 2MASS J03202839-0446358
• The Directly Imaged Planet around the Young Solar Analog 1RXS J160929.1-210524: Confirmation of Common Proper Motion, Temperature and Mass
• The AllWISE Motion Survey and The Quest for Cold Subdwarfs
• Clouds, Gravity and Metallicity in Blue L dwarfs: The Case of 2MASS J11263991-5003550
• Discovery of a wide planetary-mass companion to the young M3 star GU Psc
• Planets Around Low-Mass Stars (PALMS). III. A Young Dusty L Dwarf Companion at the Deuterium-Burning Limit
• Discovery of the brightest T dwarf in the northern hemisphere
• Discovery of very nearby ultracool dwarfs from DENIS
• The Solar Neighborhood. XXVI. AP Col: The Closest (8.4 pc) Pre-Main-Sequence Star
• Near-infrared low-resolution spectroscopy of Pleiades L-type brown dwarfs
• Accretion disk and ionized absorber of the 9.7-hour dipping black hole binary MAXI J1305-704
• BSG alignment of SDSS galaxy groups
• Discovery of two L & T binaries with wide separations and peculiar photometric properties
• Imbalanced Relativistic Force-Free Magnetohydrodynamic Turbulence
• The ages of L dwarfs
• SIMP: A Near-Infrared Proper Motion Survey

Cited by in corpus (25)

• Population Properties of Brown Dwarf Analogs to Exoplanets
• The Hawaii Infrared Parallax Program. II. Young Ultracool Field Dwarfs
• BANYAN. VII. A New Population of Young Substellar Candidate Members of Nearby Moving Groups from the BASS Survey
• Discovery of a young planetary mass companion to the nearby M dwarf VHS J125601.92-125723.9
• First light of the VLT planet finder SPHERE. IV. Physical and chemical properties of the planets around HR8799
• Photometry and Proper Motions of M, L, and T Dwarfs from the Pan-STARRS1 3$\pi$ Survey
• BANYAN. V. A Systematic All-Sky Survey for New Very Late-Type Low-Mass Stars and Brown Dwarfs in Nearby Young Moving Groups
• A Volume-Limited Sample of Ultracool Dwarfs. I. Construction, Space Density, and a Gap in the L/T Transition
• LACEwING: A New Moving Group Analysis Code
• Let the Great World Spin: Revealing the Stormy, Turbulent Nature of Young Giant Exoplanet Analogs with the Spitzer Space Telescope
• BANYAN. IX. The Initial Mass Function and Planetary-Mass Object Space Density of the TW Hya Association
• The First H-band Spectrum of the Massive Gas Giant Planet beta Pictoris b with the Gemini Planet Imager
• Survivability of planetary systems in young and dense star clusters
• In-depth study of moderately young but extremely red, very dusty substellar companion HD206893B
• Exploring the Role of Sub-micron Sized Dust Grains in the Atmospheres of Red L0 - L6 Dwarfs
• A 2MASS/AllWISE Search for Extremely Red L Dwarfs -- The Discovery of Several Likely L Type Members of $\beta$ Pic, AB Dor, Tuc-Hor, Argus, and the Hyades
• BANYAN. VI. Discovery of a companion at the brown dwarf/planet-mass limit to a Tucana-Horologium M dwarf
• A Brown Dwarf Census from the SIMP Survey
• Discovery of a brown dwarf companion to the star HIP 64892
• Optical and Near-Infrared Spectra of sigma Orionis Isolated Planetary-mass Objects
• A new free-floating planet in the Upper Scorpius association
• A Census of the 32 Ori Association with Gaia
• Radial Velocities, Space Motions, and Nearby Young Moving Group Memberships of Eleven Candidate Young Brown Dwarfs
• Spectral characterization of young LT dwarfs
• The BANYAN All-Sky Survey for Brown Dwarf Members of Young Moving Groups