SIMBAD references

2007ApJ...671L.165H - Astrophys. J., 671, L165-L168 (2007/December-3)

The Moth: an unusual circumstellar structure associated with HD 61005.

HINES D.C., SCHNEIDER G., HOLLENBACH D., MAMAJEK E.E., HILLENBRAND L.A., METCHEV S.A., MEYER M.R., CARPENTER J.M., MORO-MARTIN A., SILVERSTONE M.D., KIM J.S., HENNING T., BOUWMAN J. and WOLF S.

Abstract (from CDS):

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 µm 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*~2x10–3 suggests scattering particle sizes of order a≲1.1 µm/2π∼0.2 µm, comparable to the blowout size (a~0.3 µm) 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.

Abstract Copyright:

Journal keyword(s): Stars: Circumstellar Matter - Infrared: Stars - Stars: Planetary Systems: Protoplanetary Disks - stars: individual (HD 61005)

Simbad objects: 7

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2020.01.21-03:00:42

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