SIMBAD references

2014MNRAS.443..454L - Mon. Not. R. Astron. Soc., 443, 454-473 (2014/September-1)

Sejong Open Cluster Survey (SOS) - III. The young open cluster NGC 1893 in the HII region W8.


Abstract (from CDS):

We present a UBVI and Hα photometric study of the young open cluster NGC 1893 in the Hii region W8 (IC 410 or Sh 2-236). A total of 65 early-type members are selected from photometric diagrams. A mean reddening of the stars is <E(B - V)> = 0.563±0.083mag. The published photometric data in the near- and mid-infrared passbands are used to test the reddening law towards the cluster, and we confirm that the reddening law is normal (RV = 3.1). Zero-age main-sequence fitting gives a distance modulus of V0 - MV = 12.7±0.2mag, equivalent to 3.5±0.3 kpc. From Hα photometry, 125 Hα emission stars and candidates are identified as pre-main-sequence (PMS). The lists of young stellar objects and X-ray sources published by previous studies allow us to select a large number of PMS members down to 1M. Isochrone fitting in the Hertzsprung-Russell diagram gives a turn-off age of 1.5Myr and the median age of 1.9Myr from the PMS members with a spread of ∼ 5Myr. We derive the initial mass function (IMF) for stars with mass larger than 1M. The slope of the IMF (Γ = -1.3±0.1) is well consistent with the Salpeter/Kroupa IMF. A total mass of the cluster appears to be in excess of 1300M. Finally, we estimate the mass accretion rate of 82 PMS members in the mass range of 0.6-5M.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): accretion, accretion discs - circumstellar matter - stars: luminosity function, mass function - open clusters and associations: individual: NGC 1893

VizieR on-line data: <Available at CDS (J/MNRAS/443/454): table2.dat>

Nomenclature: Table 2: [LSK2014b] NNNN (Nos 1-6485).

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 49

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