2014MNRAS.443..454L

Query : 2014MNRAS.443..454L

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.

LIM B., SUNG H., KIM J.S., BESSELL M.S. and PARK B.-G.

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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Number of rows : 49
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 IC 1848 OpC 02 51 19.4 +60 25 32   6.87 6.5     ~ 522 2
3 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
4 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1453 0
5 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
6 IC 410 Cl* 05 22.0 +33 29           ~ 56 0
7 W 8 Rad 05 22.0 +33 29           ~ 8 1
8 HD 242855 * 05 22 07.4009235312 +33 31 44.555702592   10.71 10.65     ~ 10 0
9 NGC 1893 256 Y*O 05 22 18.4375552728 +33 28 21.228695220   12.04 11.86   11.412 B2V 19 0
10 HD 242908 Y*O 05 22 29.3024469216 +33 30 50.454124452 8.6 9.280 9.084 9.241   O4.5V(n)((fc))z 128 0
11 SH 2-236 HII 05 22.6 +33 22           ~ 36 1
12 LS V +33 15 Y*O 05 22 39.6835151291 +33 22 18.258113541 10.17 10.71 10.22 10.009 9.264 O7V(n)z 39 1
13 HD 242926 Y*O 05 22 40.0955764848 +33 19 09.399870012 9.04 9.65 9.40     O7Vz 87 0
14 NGC 1893 92 * 05 22 40.5083520912 +33 29 29.324358528   12.22 11.85     ~ 7 0
15 NGC 1893 327 * 05 22 43.3341215616 +33 17 17.186424720   11.83 11.61     A4V 8 0
16 BD+33 1025 Y*O 05 22 43.9986915696 +33 26 26.656482120 9.84 10.37 10.28   9.904 O7.5V(n)z 47 0
17 LS V +33 18 Y*O 05 22 44.7728348184 +33 26 36.686126292 10.96 11.49 11.324   10.978 ~ 20 0
18 2MASS J05224526+3322169 Y*O 05 22 45.2628683448 +33 22 16.905014004   11.08 10.81 10.605 10.254 A4V 14 0
19 HD 242935 ** 05 22 46.541232 +33 25 11.34300 8.9     9.608   O7.5V((f)) 73 0
20 NGC 1893 48 * 05 22 47.8409617800 +33 28 34.129098444   12.34 11.06     ~ 7 0
21 LS V +33 20 Y*O 05 22 49.5723167560 +33 26 52.605468555 10.9 11.15 10.98     ~ 23 0
22 LS V +33 21 Y*O 05 22 52.2224872704 +33 23 03.446213424 10.98 11.58 11.50 11.55 11.183 B1III 31 0
23 NGC 1893 OpC 05 22 52.8 +33 26 32           ~ 270 0
24 EM* GGA 332 Y*O 05 22 53.7136294440 +33 23 31.526458728 11.54 12.06 12.38   11.723 B1.5V 25 0
25 SIM 130 ISM 05 22 55.0 +33 31 57           ~ 19 0
26 LS V +33 23 Y*O 05 23 02.2652062800 +33 31 37.349741352 10.77 11.46 11.24 10.978 10.817 B0.2V 24 0
27 SIM 129 ISM 05 23 08.0 +33 28 50           ~ 16 0
28 LS V +33 24 * 05 23 12.8415126016 +33 18 55.182577703 11.02 11.48 11.05     B0.5V 25 0
29 Hilt 446 Y*O 05 23 14.3608720031 +33 33 50.640080042 10.33 11.17 10.96     B1.5 31 1
30 Cl* NGC 1893 CF 21 PM* 05 23 17.3601726264 +33 17 44.917903356   11.84 11.25 10.907   ~ 3 0
31 HD 243018 Y*O 05 23 19.4679259186 +33 27 08.034444544 10.38 11.1 11.0     B0.2V 33 1
32 LS V +33 27 Y*O 05 23 19.7993200566 +33 32 11.241198030 10.89 11.49 11.24     B0.3V 27 0
33 2MASS J05232121+3329447 Y*O 05 23 21.2062411248 +33 29 44.688546348   11.12 10.86     F0 7 0
34 BD+33 1028 * 05 23 22.0697999064 +33 29 04.239426372   10.30 9.13     A4V 11 0
35 LS V +33 29 Y*O 05 23 25.0994097212 +33 26 09.372221715 13.22 11.67 11.42 11.76   B1.5III 29 0
36 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
37 Ass Aur OB 2 As* 05 28 +34.9           ~ 48 0
38 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
39 NGC 2244 OpC 06 32 06.9 +04 54 19           ~ 673 1
40 NGC 2264 OpC 06 40 53.7 +09 52 32           ~ 1876 0
41 NGC 2353 OpC 07 14 34.0 -10 15 11   7.30 7.1     ~ 114 0
42 Cl Trumpler 14 OpC 10 43 56.0 -59 33 07   5.70 5.5     ~ 547 0
43 Cl Trumpler 16 OpC 10 45 01.9 -59 42 00           ~ 510 0
44 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1
45 NGC 3603 OpC 11 14 57.9 -61 14 32           ~ 1136 1
46 * rho Oph ** 16 25 35.11766 -23 26 49.8150 4.30 4.85 4.63 4.27 3.96 B2IV+B2V 670 0
47 Cl Westerlund 1 OpC 16 47 02.4 -45 51 07           ~ 655 1
48 NGC 6231 OpC 16 54 14.4 -41 48 53           ~ 562 0
49 NGC 6530 OpC 18 04 31 -24 21.5           ~ 443 0

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