Classification of LAMOST DR4 galaxies : J/MNRAS/474/1873

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Authors : Wang L.-L. orcid , Luo A.-L., Shen S.-Y. (hide) , Luo A.-L., Shen S.-Y. et..al

VizieR DOI : 10.26093/cds/vizier.74741873
Bibcode : 2018MNRAS.474.1873W (ADS) (Simbad) (Objects)
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CDS Keywords : Surveys; Galaxy catalogs; Photometry, SDSS; Spectroscopy
UAT : Surveys, Galaxies, Catalogs, Optical astronomy, Sloan photometry, Spectroscopy

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Inserted into VizieR : 04-Mar-2021
Last modification : 18-Aug-2024

Spectral classification and composites of galaxies in LAMOST DR4. (2018)

Keywords : methods data analysis - techniques: spectroscopic - catalogues - galaxies: statistics

Abstract:We study the classification and composite spectra of galaxies in the fourth data release (DR4) of the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST). We select 40182 spectra of galaxies from LAMOST DR4, which have photometric information but no spectroscopic observations in the Sloan Digital Sky Survey (SDSS). These newly observed spectra are recalibrated and classified into six classes - passive, H{alpha}-weak, star-forming, composite, LINER and Seyfert - using the line intensity (H{beta}, [OIII] 5007, H{alpha} and [NII] 6585). We also study the correlation between spectral class and morphological type through three parameters: concentration index, (u-r) colour and D4000n index. We calculate composite spectra of ...(more)
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We present a catalogue of galaxies for our Main sample, which have photometric information without spectroscopic observations in SDSS. One aim of our work is to provide a catalogue for the newly observed galaxies in LAMOST, which have no spectral observations in SDSS. We give the fluxes of nebular emission lines and the classification information in this catalogue. There are 40182 entries (36601 targets) in the catalogue. There are five kinds of information: basic information retrieved from the LAMOST catalogue; Petrosian magnitudes cross-matched with the photometric catalogue of SDSS; three parameters of correlation with morphological type; the fluxes of lines we computed in Section 3; and the spectral class using our classification scheme. Note that the morphological types are not given directly; instead, three parameters related to the morphological type are provided: concentration index, (u-r) colour and D4000n index.

  • V/153 : LAMOST DR4 catalogs (Luo+, 2018)

                


                

                    

                


                

                    

                


                

                    
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