Further Observations of the Orion Nebula Cluster

Further Observations of the Orion Nebula Cluster

New spectral types for 16 stars, UBVRI photometry for 13 stars and UBVRIHKL photometry for 35 stars in the Orion Nebula cluster are presented. Analysis of this data together with those of Penston (1973) shows the reddening law in the cluster is normal. Previous claims for high ratios of total to sel...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Mon. Not. R. Astron. Soc., v. 171, no. 1, pp. 219-234 v. 171, no. 1, pp. 219-234, 1975-04, Vol.171 (1), p.219-234
Hauptverfasser: Penston, M. V., Hunter, J. K., Neill, A. O
Format: Artikel
Sprache:eng
Schlagworte:
COLOR
INFRARED RADIATION
N56200 -Physics (Astrophysics & Cosmology)-Stars
NEBULAE- PHOTOMETRY
SPECTRA
STAR CLUSTERS- PHOTOMETRY
STAR EVOLUTION
VISIBLE RADIATION
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:New spectral types for 16 stars, UBVRI photometry for 13 stars and UBVRIHKL photometry for 35 stars in the Orion Nebula cluster are presented. Analysis of this data together with those of Penston (1973) shows the reddening law in the cluster is normal. Previous claims for high ratios of total to selective absorption are caused by mistaking infrared emission for a hole in the absorption at that wavelength. The distance modulus of M42 is $8\cdot0\,\pm \,0\cdot1$ mag. Star formation in the cluster has been in progress over the last 107 yr. The infrared colours of cluster stars are correlated with their range of variation in the optical.
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/171.1.219