A method is advanced that combines principal component analysis (PCA) and cluster analysis (CA) for selecting OB associations in unresolved fields using photometric data. The PCA and CA techniques are applied to fluxes and colors to derive an artificial image that allows the determination of possible locations of star-forming regions. The method is tested on data from NGC 2903, and the PCA/CA code allows the identification of outer-branch clumps and well defined knots in the galaxy.
An identification technique for OB associations in unresolved galaxies / CAPUZZO DOLCETTA, Roberto Angelo; P., Battinelli. - In: MEMORIE DELLA SOCIETÀ ASTRONOMICA ITALIANA. - ISSN 1824-016X. - STAMPA. - 63:(1992), pp. 169-172. (Intervento presentato al convegno Star Clusters and Stellar Evolution tenutosi a Teramo nel 18-20 June 1991).
An identification technique for OB associations in unresolved galaxies
CAPUZZO DOLCETTA, Roberto Angelo;
1992
Abstract
A method is advanced that combines principal component analysis (PCA) and cluster analysis (CA) for selecting OB associations in unresolved fields using photometric data. The PCA and CA techniques are applied to fluxes and colors to derive an artificial image that allows the determination of possible locations of star-forming regions. The method is tested on data from NGC 2903, and the PCA/CA code allows the identification of outer-branch clumps and well defined knots in the galaxy.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
