scholarly journals Tabletop mid-infrared nulling testbed for the Keck interferometer and the Terrestrial Planet Finder

2003 ◽  
Author(s):  
Christopher D. Koresko ◽  
Bertrand P. Mennesson ◽  
Samuel L. Crawford ◽  
Michelle J. Creech-Eakman ◽  
J. Kent Wallace ◽  
...  
2003 ◽  
Author(s):  
Stefan R. Martin ◽  
Robert O. Gappinger ◽  
Frank M. Loya ◽  
Bertrand P. Mennesson ◽  
Samuel L. Crawford ◽  
...  

2009 ◽  
Vol 5 (H15) ◽  
pp. 815-815
Author(s):  
Antonio S. Hales ◽  
Michael J. Barlow ◽  
Janet E. Drew ◽  
Yvonne C. Unruh ◽  
Robert Greimel ◽  
...  

AbstractThe Isaac Newton Photometric H-Alpha Survey (IPHAS) provides (r′-Hα)-(r′-i′) colors, which can be used to select AV0-5 Main Sequence star candidates (age~20-200 Myr). By combining a sample of 23050 IPHAS-selected A-type stars with 2MASS, GLIMPSE and MIPSGAL photometry we searched for mid-infrared excesses attributable to dusty circumstellar disks. Positional cross-correlation yielded a sample of 2692 A-type stars, of which 0.6% were found to have 8-μm excesses above the expected photospheric values. The low fraction of main sequence stars with mid-IR excesses found in this work indicates that dust disks in the terrestrial planet zone of Main Sequence intermediate mass stars are rare. Dissipation mechanisms such as photo-evaporation, grain growth, collisional grinding or planet formation could possibly explain the depletion of dust detected in the inner regions of these disks.


1998 ◽  
Author(s):  
Charley Noecker ◽  
Brian K. McComas ◽  
Greg A. Kopp

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