Maness, H. L. and Fitzgerald, M. P. and Paladini, R. and Kalas, P. and Duchene, G. and Graham, James R. (2008) CARMA Millimeter-Wave Aperture Synthesis Imaging of the HD 32297 Debris Disk. Astrophysical Journal Letters, 686 (1). L25-L28. ISSN 0004-637X http://resolver.caltech.edu/CaltechAUTHORS:MANapjl08b
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We present the first detection and mapping of the HD 32297 debris disk at 1.3 mm with the Combined Array for Research in Millimeter-wave Astronomy (CARMA). With a subarcsecond beam, this detection represents the highest angular resolution (sub)mm debris disk observation made to date. Our model fits to the spectral energy distribution from the CARMA flux and new Spitzer MIPS photometry support the earlier suggestion that at least two, possibly three, distinct grain populations are traced by the current data. The observed millimeter map shows an asymmetry between the northeast and southwest disk lobes, suggesting large grains may be trapped in resonance with an unseen exoplanet. Alternatively, the observed morphology could result from the recent breakup of a massive planetesimal. A similar-scale asymmetry is also observed in scattered light but not in the mid-infrared. This contrast between asymmetry at short and long wavelengths and symmetry at intermediate wavelengths is in qualitative agreement with predictions of resonant debris disk models. With resolved observations in several bands spanning over three decades in wavelength, HD 32297 provides a unique test bed for theories of grain and planetary dynamics, and could potentially provide strong multiwavelength evidence for an exoplanetary system.
|Additional Information:||© 2008 The American Astronomical Society. Received 2008 July 11; accepted 2008 August 25; published 2008 September 11. The authors gratefully acknowledge the work of the CARMA team, without whom these observations would not have been possible; we particularly wish to thank D. Bock, J. Carpenter, D. Hawkins, M. Hodges, J. Lamb, R. Plambeck, M. Pound, S. Scott, D. Woody, and M. Wright. H. M. is funded by the GRFP at NSF and the GOPF at UC Berkeley. M. P. F. acknowledges support from the Michelson Fellowship Program, under contract with JPL, funded by NASA. Work at LLNL was performed under the auspices of DOE under contract DE-AC52- 07NA27344. Support for CARMA construction was derived from the states of California, Illinois, and Maryland, the Gordon and Betty Moore Foundation, the Eileen and Kenneth Norris Foundation, the Caltech Associates, and the National Science Foundation. Ongoing CARMA development and operations are supported by the National Science Foundation under a cooperative agreement, and by the CARMA partner universities.|
|Subject Keywords:||circumstellar matter; planetary systems: formation; planetary systems: protoplanetary disks; stars: individual (HD 32297)|
|Official Citation:||CARMA Millimeter-Wave Aperture Synthesis Imaging of the HD 32297 Debris Disk H. L. Maness, M. P. Fitzgerald, R. Paladini, P. Kalas, G. Duchene, and James R. Graham 2008 ApJ 686 L25-L28 doi: 10.1086/592783|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||14 Jul 2009 18:05|
|Last Modified:||26 Dec 2012 10:51|
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