ASK spectroscopic sequence of galaxies (Ascasibar+, 2011)

Bibcode
2012yCat..74152417A
Ascasibar, Y.; Sanchez-Almeida, J.
Referencia bibliográfica

VizieR On-line Data Catalog: J/MNRAS/415/2417. Originally published in: 2011MNRAS.415.2417A

Fecha de publicación:
3
2012
Número de autores
2
Número de autores del IAC
1
Número de citas
0
Número de citas referidas
0
Descripción
We identify a spectroscopic sequence of galaxies, analogous to the Hubble sequence of morphological types, based on the Automatic Spectroscopic K-means-based (ASK) classification. Considering galaxy spectra as multidimensional vectors, the majority of the spectral classes are distributed along a well-defined curve going from the earliest to the latest types, suggesting that the optical spectra of normal galaxies can be described in terms of a single affine parameter. Optically bright active galaxies, however, appear as an independent, roughly orthogonal branch that intersects the main sequence exactly at the transition between early and late types. (1 data file).
Tipo
Sin árbitro
Espectroscopia

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