The First Circumstellar Disk Imaged in Silhouette at Visible Wavelengths with Adaptive Optics: MagAO Imaging of Orion 218-354

We present high-resolution adaptive optics (AO) corrected images of the silhouette disk Orion 218-354 taken with Magellan AO (MagAO) and its visible light camera, VisAO, in simultaneous differential imaging mode at Hα. This is the first image of a circumstellar disk seen in silhouette with AO and is among the first visible light AO results in the literature. We derive the disk extent, geometry, intensity, and extinction profiles and find, in contrast with previous work, that the disk is likely optically thin at Hα. Our data provide an estimate of the column density in primitive, ISM-like grains as a function of radius in the disk. We estimate that only ∼10% of the total submillimeter derived disk mass lies in primitive, unprocessed grains. We use our data, Monte Carlo radiative transfer modeling, and previous results from the literature to make the first self-consistent multiwavelength model of Orion 218-354. We find that we are able to reproduce the 1-1000 μm spectral energy distribution with a ∼2-540 AU disk of the size, geometry, small versus large grain proportion, and radial mass profile indicated by our data. This inner radius is a factor of ∼15 larger than the sublimation radius of the disk, suggestingmore » that it is likely cleared in the very interior.« less

[1]  B. Savage,et al.  A survey of interstellar H I from L-alpha absorption measurements. II , 1978 .

[2]  J. Mathis.  Interstellar dust and extinction , 1987 .

[3]  P. Martin,et al.  The Size Distribution of Interstellar Dust Particles as Determined from Extinction , 1993 .

[4]  Z. Wen,et al.  Postrefurbishment mission Hubble Space Telescope images of the core of the Orion Nebula: Proplyds, Herbig-Haro objects, and measurements of a circumstellar disk , 1994 .

[5]  M. Mccaughrean,et al.  A Search for Thermal Infrared Emission from Three Silhouette Disks in Orion , 1996 .

[6]  C. O’Dell,et al.  Hubble Space Telescope Mapping of the Orion Nebula. I. A Survey of Stars and Compact Objects , 1996 .

[7]  Mark J. McCaughrean,et al.  Direct Imaging of Circumstellar Disks in the Orion Nebula , 1996 .

[8]  L. Hillenbrand.  On the Stellar Population and Star-Forming History of the Orion Nebula Cluster , 1997 .

[9]  Mark J. McCaughrean,et al.  Disks, Microjets, Windblown Bubbles, and Outflows in the Orion Nebula , 2000 .

[10]  The Spectral Energy Distribution of HH 30 IRS: Constraining the Circumstellar Dust Size Distribution , 2001, astro-ph/0109048.

[11]  The Luminosity and Mass Function of the Trapezium Cluster: From B Stars to the Deuterium-burning Limit , 2002, astro-ph/0203122.

[12]  M. Wolff,et al.  Two-dimensional Radiative Transfer in Protostellar Envelopes. I. Effects of Geometry on Class I Sources , 2003, astro-ph/0303479.

[13]  Martin G. Cohen,et al.  TWO-DIMENSIONAL RADIATIVE TRANSFER IN PROTOSTELLAR ENVELOPES. II. AN EVOLUTIONARY SEQUENCE , 2003, astro-ph/0309007.

[14]  E. Feigelson,et al.  X-Ray Emission from Orion Nebula Cluster Stars with Circumstellar Disks and Jets , 2005, astro-ph/0506650.

[15]  K. Menten,et al.  The distance to the Orion Nebula , 2007, 0709.0485.

[16]  Massimo Robberto,et al.  THE HUBBLE SPACE TELESCOPE/ADVANCED CAMERA FOR SURVEYS ATLAS OF PROTOPLANETARY DISKS IN THE GREAT ORION NEBULA , 2008 .

[17]  Laird M. Close,et al.  Enabling technologies for visible adaptive optics: the Magellan adaptive secondary VisAO camera , 2009, Optical Engineering + Applications.

[18]  N. D. Rio,et al.  A MULTI-COLOR OPTICAL SURVEY OF THE ORION NEBULA CLUSTER. I. THE CATALOG , 2009, 0906.4336.

[19]  Jonathan P. Williams,et al.  A SUBMILLIMETER ARRAY SURVEY OF PROTOPLANETARY DISKS IN THE ORION NEBULA CLUSTER , 2010, 1010.1962.

[20]  Alan Uomoto,et al.  The first VisAO-fed integral field spectrograph: VisAO IFS , 2010, Astronomical Telescopes + Instrumentation.

[21]  Armando Riccardi,et al.  Laboratory demonstration of real time frame selection with Magellan AO , 2012, Other Conferences.

[22]  Laird M. Close,et al.  Status update and closed-loop performance of the Magellan adaptive optics VisAO camera , 2012, Other Conferences.

[23]  H. Terada,et al.  DISCOVERY OF CRYSTALLIZED WATER ICE IN A SILHOUETTE DISK IN THE M43 REGION , 2012, 1204.5503.

[24]  Y. Minowa,et al.  ADAPTIVE OPTICS OBSERVATIONS OF 3 μm WATER ICE IN SILHOUETTE DISKS IN THE ORION NEBULA CLUSTER AND M43 , 2012, 1210.5772.

[25]  Tyson Hare,et al.  First closed-loop visible AO test results for the advanced adaptive secondary AO system for the Magellan Telescope: MagAO's performance and status , 2012, Other Conferences.

[26]  S. Esposito,et al.  DIFFRACTION-LIMITED VISIBLE LIGHT IMAGES OF ORION TRAPEZIUM CLUSTER WITH THE MAGELLAN ADAPTIVE SECONDARY ADAPTIVE OPTICS SYSTEM (MagAO) , 2013, 1308.4155.

[27]  M. Wolff,et al.  THREE-DIMENSIONAL RADIATION TRANSFER IN YOUNG STELLAR OBJECTS , 2013, 1307.0561.

[28]  Bernard Muschielok,et al.  The 4MOST instrument concept overview , 2014, Astronomical Telescopes and Instrumentation.