Please note that eDoc will be permanently shut down in the first quarter of 2021!      Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Session History
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 358729.0, MPI für Astronomie / Publikationen_mpia
The moth: an unusual circumstellar structure associated with HD 61005
Authors:Hines, D. C.; Schneider, G.; Hollenbach, D.; Mamajek, E. E.; Hillenbrand, L. A.; Metchev, S. A.; Meyer, M. R.; Carpenter, J. M.; Moro-Martín, A.; Silverstone, M. D.; Kim, J. S.; Henning, T.; Bouwman, J.; Wolf, S.
Date of Publication (YYYY-MM-DD):2007
Title of Journal:The Astrophysical Journal
Volume:671
Start Page:L165
End Page:L168
Audience:Not Specified
Abstract / Description:We present the discovery of an unusual spatially resolved circumstellar structure associated with the ~90 Myr, nearby, G dwarf star HD 61005. Observations from the FEPS Spitzer Legacy Science survey reveal thermal emission in excess of expected stellar photospheric levels. Follow-up 0.1" resolution HST NICMOS coronagraphic images reveal scattered starlight <=7" (~240 AU) from the occulted star (1.1 mum flux density =18+/-3.3 mJy; and 0.77%+/-0.16% of the starlight). The extremely high near-IR scattering fraction and IR excess luminosity f=LIR/L*~2×10-3 suggests scattering particle sizes of order a<~1.1 mum/2pi~0.2 mum, comparable to the blowout size (a~0.3 mum) due to radiation pressure from the star. Dust-scattered starlight is traced inward to an instrumental limit of ~10 AU. The structure exhibits a strong asymmetry about its morphological major axis but is mirror-symmetric about its minor axis.
Free Keywords:Stars: Circumstellar Matter; Infrared: Stars; Stars: Planetary Systems: Protoplanetary Disks; stars: individual (HD 61005)
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2007ApJ...671L.165H
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.