Doering, R. L. and Meixner, M. and Holfeltz, S. T. and Krist, J. E. and Ardila, D. R. and Kamp, I. and Clampin, M. C. and Lubow, S. H. (2007) HD 97048's Circumstellar Environment as Revealed by a Hubble Space Telescope ACS Coronagraphic Study of Disk Candidate Stars. Astronomical Journal, 133 (5). pp. 2122-2131. ISSN 0004-6256 http://resolver.caltech.edu/CaltechAUTHORS:20100219-110616715
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We present the results of a coronagraphic scattered-light imaging survey of six young disk candidate stars using the Hubble Space Telescope Advanced Camera for Surveys. The observations made use of the 1.8" occulting spot through the F606W (broad V) filter. Circumstellar material was imaged around HD 97048, a Herbig Ae/Be star located in the Chamaeleon I dark cloud at a distance of 180 pc. The material is seen between ~2" (360 AU) and ~4" (720 AU) from the star in all directions. A V-band azimuthally averaged radial surface brightness profile peaks at r = 2" with a value of 19.6 ± 0.2 mag arcsec^(-2) and smoothly decreases with projected distance from the star as I ∝ r^(-3.3±0.5). An integrated flux of 16.8 ± 0.1 mag is measured between 2" and 4", corresponding to a scattered-light fractional luminosity lower limit of L_(sca)/L_* > 8.4 × 10^(-4). Filamentary structure resembling spiral arms similar to that seen in Herbig Ae/Be disks is observed. Such structure has been attributed to the influence of orbiting planets or stellar encounters. Average surface brightness upper limits are determined for the five nondetections: HD 34282, HD 139450, HD 158643, HD 159492, and HD 195627. Possible reasons for the nondetections are disks that are too faint or disks hidden by the occulter.
|Additional Information:||© 2007 The American Astronomical Society Received 2006 July 14; accepted 2007 January 6. This work was supported by NASA/STScI GO-10425.01 and NASA grant NAG5-12595. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France. We thank E. Pantin for useful discussions about the HD 97048 VISIR image.|
|Subject Keywords:||circumstellar matter; stars : individual (HD 34282, HD 97048, HD 139450; HD 158643, HD 159492, HD 195627)|
|Official Citation:||HD 97048's Circumstellar Environment as Revealed by a Hubble Space Telescope ACS Coronagraphic Study of Disk Candidate Stars R. L. Doering, M. Meixner, S. T. Holfeltz, J. E. Krist, D. R. Ardila, I. Kamp, M. C. Clampin, and S. H. Lubow 2007 The Astronomical Journal 133 2122-2131 doi: 10.1086/512610|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||22 Feb 2010 17:32|
|Last Modified:||26 Dec 2012 11:47|
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