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Two star forming regions in NGC6822, studied by Bianchi et al. 2001 (you may find the article from the link below). Pictures from the HST WFPC2 multiband imaging with color coding: red= Halpha, green= B, blue= UV. The HST photometry revealed young stellar populations and a large number of massive star candidates. Follow-up spectroscopy with HST STIS and with ESO VLT is under way. |
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A portion of VLT spectrum (purple line) of one of the stars selected from Bianchi et al. 2001 HST photometry. The black dashed line is a synthetic model calculated to derive the stellar parameters. (work in progress) |
Publications and Preprints on NGC6822:
updated list of all publications
Spectroscopy paper in preparation
Bianchi, L. , Efremova, B., Hodge, P., et al. 2012, AJ,143, 74
Bianchi, L. , Kang, Y. B., Efremova, B., Thilker, D., Hodge, P., Massey, P. and Olsen, K 2011,
ApSS, 335, 249 ; DOI: 10.1007/s10509-011-0697-7
(Special Issue "UV Astronomy 2011", editors B. Shustov, A.I. Gomez de Castro, and M. Sachkov)
Efremova, B., Bianchi, L. , Thilker, D. et al. 2011, ApJ, 730, 88
(arXiv:1101.6051)
Bianchi, L., 2007,
in ``The UV Universe: Stars from Birth to Death'',
eds. A.I. Gomez de Castro and M. Barstow, in press
(invited paper at the IAU GA 2006 JD04)
[ps file]
Bianchi, L., and Efremova, B. 2006, AJ, 132, 378
[ps gz file]
[pdf file]
[link to AJ]
Bianchi et al. 2001 PASP, 113, 697
A Treasury Study of Star-Forming Regions in the Local Group. I. HST Photometry of Young Populations
in Six Dwarf Galaxies.
(click here to download pdf)
Young Stellar Populations in the Local Group: an HST and GALEX comprehensive study
(download pdf of accepted article)
The Recent Star Formation in NGC6822: a UV study
download manuscript pdf or go to
paper from ApJ site
High Mass Stars: Stellar Populations
The recent star formation in NGC6822 from HST imaging
Spectroscopy of Massive Stars in NGC6822 and M33
Bianchi et al. 2001, AJ, 121, 2020
The Massive Star Content of NGC6822. Ground-based and HST photometry.