2017ApJS..230....3S

Query : 2017ApJS..230....3S

2017ApJS..230....3S - Astrophys. J., Suppl. Ser., 230, 3-3 (2017/May-0)

An optical and infrared photometric study of the young open cluster IC 1805 in the giant H II region W4.

SUNG H., BESSELL M.S., CHUN M.-Y., YI J., NAZE Y., LIM B., KARIMOV R., RAUW G., PARK B.-G. and HUR H.

Abstract (from CDS):

We present deep wide-field optical CCD photometry and mid-infrared Spitzer/IRAC and MIPS 24 µm data for about 100,000 stars in the young open cluster IC 1805. The members of IC 1805 were selected from their location in the various color-color and color-magnitude diagrams, and the presence of Hα emission, mid-infrared excess emission, and X-ray emission. The reddening law toward IC 1805 is nearly normal (RV = 3.05 ± 0.06). However, the distance modulus of the cluster is estimated to be 11.9 ± 0.2 mag (d=2.4±0.2 kpc) from the reddening-free color-magnitude diagrams, which is larger than the distance to the nearby massive star-forming region W3(OH) measured from the radio VLBA astrometry. We also determined the age of IC 1805 (τMSTO=3.5 Myr). In addition, we critically compared the age and mass scale from two pre-main-sequence evolution models. The initial mass function with a Salpeter-type slope of Γ = -1.3 ± 0.2 was obtained and the total mass of IC 1805 was estimated to be about 2700 ± 200 M☉. Finally, we found our distance determination to be statistically consistent with the Tycho-Gaia Astrometric Solution Data Release 1, within the errors. The proper motion of the B-type stars shows an elongated distribution along the Galactic plane, which could be explained by some of the B-type stars being formed in small clouds dispersed by previous episodes of star formation or supernova explosions.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): open clusters and associations: individual: IC 1805 - stars: formation - stars: pre-main sequence - stars: pre-main sequence

VizieR on-line data: <Available at CDS (J/ApJS/230/3): table2.dat table5.dat table6.dat table8.dat>

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

Simbad objects: 42

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Number of rows : 42
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 IC 4 GiG 00 13 26.951 +17 29 11.14   14.2       ~ 42 0
2 IC 23 Sy2 00 30 50.8121190816 -12 43 12.480571740   14   13.74   ~ 15 0
3 IRAS 00420+5530 Y*? 00 44 57.31 +55 47 18.1           ~ 58 0
4 NGC 281 HII 00 52 25.1 +56 33 54           ~ 243 1
5 V* DN Cas SB* 02 23 11.5401628296 +60 49 50.178378072 10.22 10.46 9.93     O8.5V 87 0
6 IC 1795 HII 02 25 43.5 +62 06 13           ~ 238 0
7 NAME W 3 North HII 02 26 51.14 +62 15 47.2           ~ 91 0
8 NAME W 3 OH HII 02 27 04.1 +61 52 22           ~ 1029 2
9 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 1033 3
10 IRAS 02252+6120 Y*O 02 29 01.93 +61 33 30.5           ~ 45 0
11 Cl Tombaugh 4 OpC 02 29 13.2 +61 47 13           ~ 26 0
12 V* KM Cas Or* 02 29 30.4684170480 +61 29 44.163943476 12.21 12.285 11.229 10.990   O9.5V((f)) 46 0
13 IRAS 02260+6118 Y*O 02 29 51.1326194952 +61 32 26.875228704           ~ 7 0
14 BD+60 493 s*b 02 30 51.3556566000 +61 10 39.975724344 10.571 9.12 8.48     B0.5Iae 67 0
15 BIRS 119 LP* 02 30 53.4211575626 +61 16 48.235225134           ~ 5 0
16 BD+60 497 Y*O 02 31 57.0901516200 +61 36 43.948697940 10.466 9.39 8.85     O6.5V((f))+O8/B0V 104 0
17 BD+60 498 Y*O 02 32 10.8542551368 +61 33 07.940208384 11.61 10.47 9.94     O9V 104 0
18 EM* MWC 50 Y*? 02 32 11.4523605192 +61 21 45.253334772 11.64 11.77 10.87     Be 41 0
19 NAME Heart Nebula HII 02 32.7 +61 27           ~ 318 1
20 HD 15558 Y*O 02 32 42.5366901168 +61 27 21.572901360 7.82 8.37 7.87 7.34 6.94 O4.5III(f) 314 0
21 HD 15570 Em* 02 32 49.4207394600 +61 22 42.089384892 8.40 8.80 8.11 7.41 6.86 O4If 305 0
22 IC 1805 OpC 02 32 50.4 +61 28 16           ~ 519 1
23 HD 15629 Y*O 02 33 20.5873992264 +61 31 18.188762844 8.23 8.85 8.42     O4.5V((fc)) 241 0
24 BD+60 513 Y*O 02 34 02.5297182912 +61 23 10.877763048 9.38 9.88 9.39     O7Vnz 109 0
25 IRAS 02310+6133 Cld 02 34 48.91 +61 46 43.0           ~ 33 0
26 BD+60 519 Y*O 02 35 51.7436452248 +61 12 55.024779888 12.63 10.70 8.91     K2III 11 0
27 LS I +61 303 HXB 02 40 31.6644419688 +61 13 45.593918580 11.27 11.61 10.75 10.19 9.55 B0Ve 853 2
28 Ass Cas OB 6 As* 02 43 +61.3           ~ 124 0
29 IC 1848 OpC 02 51 25.2 +60 25 08   6.87 6.5     ~ 491 2
30 BD+61 493 V* 02 53 16.7581664112 +62 28 35.025126132   9.84 8.52     K1III 3 0
31 BD+61 497a * 02 55 29.8602394728 +62 18 49.000203576   11.33 9.53     K5 3 0
32 BD+61 498 * 02 55 39.4533900480 +62 10 36.597315324   11.03 10.69     B/A 5 0
33 NAME Per Arm PoG 03 30 +45.0           ~ 1519 0
34 NAME Per Region reg 03 37 00.0 +31 15 00           ~ 273 0
35 NGC 1893 OpC 05 22 53.8 +33 26 38           ~ 261 0
36 NGC 1931 OpC 05 31 23 +34 14.0     10.1     ~ 127 0
37 NGC 2264 OpC 06 40 52.1 +09 52 37           ~ 1793 0
38 Cl Westerlund 2 OpC 10 23 58.1 -57 45 49           ~ 359 0
39 Cl Trumpler 14 OpC 10 43 56.6 -59 33 11   5.70 5.5     ~ 509 0
40 Cl Trumpler 16 OpC 10 45 00.7 -59 42 00           ~ 484 0
41 NGC 3603 OpC 11 15 10.8 -61 15 32           ~ 1069 1
42 NGC 6231 OpC 16 54 10.8 -41 48 43           ~ 539 0

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