A New Automated Classification Technique of Galaxy Spectra with Z<1.2 Based on PCA-ODP

Details A New Automated Classification Technique of Galaxy Spectra with Z<1.2 Based on PCA-ODP A New Automated Classification Technique of Galaxy Spectra with Z<1.2 Based on PCA-ODP

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4847..362q&link_type=abstract

Astronomical Data Analysis II. Edited by Starck, Jean-Luc; Murtagh, Fionn D. Proceedings of the SPIE, Volume 4847, pp. 362-3

Other

Scientific paper

In this paper, we investigate the Principal Component Analysis-Optimal Discrimination Plane (PCA-ODP) approach on a data set of galaxy spectra including eleven standard subtypes with the redshift value ranging from 0 to 1.2 and a span of 0.001. These eleven subtypes are E, S0, Sa, Sb, Sc, SB1, SB2, SB3, SB4, SB5, SB6, respectively, according to the Hubble sequence. Among them, the first four subtypes belong to the class of normal galaxies (NGs); the remaining seven belong to active galaxies (AGs). We apply the PCA approach to extract the features of galaxy spectra, project the samples onto the PCs, and investigate the ODP method on the data of feature space to find the optimal discrimination plane of the two main classes. ODP approach was developed from Fisher's linear discriminant method. The difference between them is that Fisher's method uses only one Fisher's vector and ODP uses two orthogonal vectors including Fisher's vector and another. Besides the data set above, we also use the Sloan Digital Sky Survey (SDSS) galaxy spectra and Kennicutt (1992) galaxy data to test the ODP classifier. The experiment results show that our proposed technique is both robust and efficient. The correct rate can reach as high as 99.95% for the first group data, 96% for SDSS data and 98% for Kennicutt data.

Affiliated with

Also associated with

No associations

Rating

A New Automated Classification Technique of Galaxy Spectra with Z<1.2 Based on PCA-ODP does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A New Automated Classification Technique of Galaxy Spectra with Z<1.2 Based on PCA-ODP, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A New Automated Classification Technique of Galaxy Spectra with Z<1.2 Based on PCA-ODP will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1310975