2016MNRAS.461.2250W

Query : 2016MNRAS.461.2250W

2016MNRAS.461.2250W - Mon. Not. R. Astron. Soc., 461, 2250-2256 (2016/September-2)

Locally linear embedding: dimension reduction of massive protostellar spectra.

WARD J.L. and LUMSDEN S.L.

Abstract (from CDS):

We present the results of the application of locally linear embedding (LLE) to reduce the dimensionality of dereddened and continuum subtracted near-infrared spectra using a combination of models and real spectra of massive protostars selected from the Red MSX Source survey data base. A brief comparison is also made with two other dimension reduction techniques; principal component analysis (PCA) and Isomap using the same set of spectra as well as a more advanced form of LLE, Hessian locally linear embedding. We find that whilst LLE certainly has its limitations, it significantly outperforms both PCA and Isomap in classification of spectra based on the presence/absence of emission lines and provides a valuable tool for classification and analysis of large spectral data sets.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: data analysis - stars: protostars - infrared: stars - infrared: stars

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 GUM 26 HII 09 24 30.1 -51 59 07           ~ 45 0

Query : 2016MNRAS.461.2250W

Basic data :
GUM 26 -- HII Region
Other object types: otypes_help 		HII (GUM,RCW,...), ISM (BRAN)
ICRS coord. (ep=J2000) : 		09 24 30.1 -51 59 07 [ ] D ~
FK4 coord. (ep=B1950 eq=1950) : 		09 22 50.1 -51 46 09 [ ]
Gal coord. (ep=J2000) : 		274.0087 -01.1343 [ ]
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Identifiers (7) :
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GUM 26 GAL 274.0-01.1 RCW 42 [CH87] 274.013-1.141
BRAN 263 GAL 274.01-01.14 [C72] G274.0-1.1

References (45 between 1850 and 2026) (Total 45)
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