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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/28415

Title: Distribution of extinction and star formation in NGC 1569
Authors: Relaño, Mónica
Lisenfeld, Ute
Vílchez, José
Battaner, E.
Issue Date: 2006
Abstract: We investigate the distribution of the intrinsic extinction in NGC1569 using an extinction map derived from the H_alpha/H_beta emission line ratio. We compare the extinction distribution to that of the dust emission traced by SPITZER IRAC(8microns) and MIPS (24microns) maps. The intrinsic extinction shows spatial variations, from zones with negligible extinction to zones with values up to A(V)=0.8mag. We find an extinction shell and establish a relation between this shell and the interstellar expanding structure produced by the stellar winds comig from the Super Star Cluster (SSCs) A and B in the center of the galaxy. We suggest that the extinction shell has been produced by the accumulation of dust at the border of the shell. Although we find a good spatial correlation between the Balmer extinction and infrared emission, there is a spatial displacement between the 8microns and 24microns maxima and the maximum in Balmer extinction which needs further investigation.
Sponsorship: This work has been supported by the Spanish Ministry of Education, via PNAYA (Spanish National Program for Astronomy and Astrophysics), the research projects AYA 2005-07516-C02-01, AYA 2004-08260-C03-C02 and ESP 2004-06870-C02-02, and the Junta de Andalucía.
Publisher: European Southern Observatory (ESO); Springer Verlag
Description: This work was presented at the Spitzer Conference Infrared Diagnostics of Galaxy Evolution, 14-16 November 2005
Keywords: Galaxies
NGC 1569
ISM
Irregular
Dust
Extinction
URI: http://hdl.handle.net/10481/28415
ISSN: 0004-6361
1432-0746
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Relaño, M.; et al. Distribution of extinction and star formation in NGC 1569. Astronomy and Astrophysics, 452(2): 413-421 (2006). [http://hdl.handle.net/10481/28415]
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