stars: individual: HD 114082; techniques: high angular resolution; planetary systems
Abstract :
[en] We present the first resolved image of the debris disk around the 16 ± 8 Myr old star, HD 114082. The observation was made in the H-band using the SPHERE instrument. The star is at a distance of 92 ± 6 pc in the Lower Centaurus Crux association. Using a Markov chain Monte Carlo analysis, we determined that the debris is likely in the form of a dust ring with an inner edge of 27.7[SUP]+2.8[/SUP][SUB]-3.5[/SUB] au, position angle -74.3°[SUP]+0.5[/SUP][SUB]-1.5[/SUB], and an inclination with respect to the line of sight of 6.7°[SUP]+3.8[/SUP][SUB]-0.4[/SUB]. The disk imaged in scattered light has a surface density that is declining with radius of r[SUP]-4[/SUP], which is steeper than expected for grain blowout by radiation pressure. We find only marginal evidence (2σ) of eccentricity and rule out planets more massive than 1.0 M[SUB]Jup[/SUB] orbiting within 1 au of the inner edge of the ring, since such a planet would have disrupted the disk. The disk has roughly the same fractional disk luminosity (L[SUB]disk[/SUB]/L[SUB]∗[/SUB] = 3.3 × 10[SUP]-3[/SUP]) as HR 4796 A and β Pictoris, however it was not detected by previous instrument facilities most likely because of its small angular size (radius 0.4''), low albedo ( 0.2), and low scattering efficiency far from the star due to high scattering anisotropy. With the arrival of extreme adaptive optics systems, such as SPHERE and GPI, the morphology of smaller, fainter, and more distant debris disks are being revealed, providing clues to planet-disk interactions in young protoplanetary systems. The reduced images are only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://130.79.128.5">http://130.79.128.5</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/596/L4">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/596/L4</A>
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Wahhaj, Zahed; European Southern Observatory, Alonso de Còrdova 3107, Vitacura, Casilla 19001, Santiago, Chile
Milli, Julien; European Southern Observatory, Alonso de Còrdova 3107, Vitacura, Casilla 19001, Santiago, Chile
Kennedy, Grant; Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, UK
Ertel, Steve; Steward Observatory, Department of Astronomy, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ, 85721, USA
Matrà, Luca; Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, UK
Boccaletti, Anthony; LESIA, Observatoire de Paris, PSL Research Univ., CNRS, Sorbonne Univ., UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 92195, Meudon, France
del Burgo, Carlos; Instituto Nacional de Astrofísica, Óptica y Electrónica, Luis Enrique Erro 1, Sta. Ma. Tonantzintla, Puebla, Mexico
Wyatt, Mark; Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, UK
Pinte, Christophe; UMI-FCA, CNRS/INSU (UMI 3386), France ; Dept. de Astronomía, Universidad de Chile, Santiago, Chile
Lagrange, Anne-Marie; Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Absil, Olivier ; Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Choquet, Elodie; Hubble Fellow at Jet Propulsion Laboratory, Caltech, 4800 Oak Grove Drive, Pasadena, CA, 91109, USA
Gómez González, Carlos ; Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Kobayashi, Hiroshi; Department of Physics, Nagoya University, Nagoya, Aichi, 464-8602, Japan
Mawet, Dimitri; Dept. of Astronomy, California Institute of Technology, 1200 E. CA Boulevard, Pasadena, CA, 91125, USA
Mouillet, David; Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Pueyo, Laurent; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD, 21218, USA
Dent, William R. F.; ALMA Santiago Central Offices, Alonso de Còrdova 3107, Vitacura, Casilla 763 0355, Santiago, Chile
Augereau, Jean-Charles; Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Girard, Julien; European Southern Observatory, Alonso de Còrdova 3107, Vitacura, Casilla 19001, Santiago, Chile)
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