Reference : An Optical and Infrared Photometric Study of the Young Open Cluster IC 1805 in the Gi...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/211733
An Optical and Infrared Photometric Study of the Young Open Cluster IC 1805 in the Giant H ii Region W4 †
English
Sung, Hwankyung [Department of Astronomy and Space Science, Sejong University, 209 Neungdong-ro, Kwangjin-gu, Seoul 05006, Korea ; Visiting Researcher, Korea Astronomy and Space Science Institute, Korea;]
Bessell, Michael S. [Research School of Astronomy & Astrophysics, The Australian National University, Canberra, ACT 2611, Australia <ID system="ORCID">0000-0001-7801-1410</ID>]
Chun, Moo-Young [Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Korea]
Yi, Jonghyuk [SELab, Inc., 8 Nonhyeon-ro 150-gil, Gangnam-gu, Seoul 06049, Korea]
Nazé, Yaël mailto [Université de Liège > > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Lim, Beomdu [Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Korea <ID system="ORCID">0000-0001-5797-9828</ID>]
Karimov, R. [Ulugh Beg Astronomical Institute, Uzbek Academy of Sciences, 33 Astronomical Street, Tashkent 700052, Uzbekistan]
Rauw, Grégor mailto [Université de Liège > > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Park, Byeong-Gon [Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Korea]
Hur, Hyeonoh [Daegu National Science Museum, 20, Techno-daero-6-gil, Yuga-myeon, Dalseong-gun, Daegu 43023, Korea <ID system="ORCID">0000-0001-9532-8524</ID>)]
1-May-2017
Astrophysical Journal Supplement Series
IOP Publishing
230
Yes (verified by ORBi)
International
0067-0049
1538-4365
[en] open clusters and associations: individual: IC 1805 ; stars: formation ; stars: pre-main sequence
[en] 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 (R [SUB] V [/SUB] = 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 ({τ }[SUB]{MSTO[/SUB]}=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}[SUB]ȯ [/SUB]. 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. The optical imaging data in this article were gathered with two facilities: the AZT-22 1.5 m telescope at Maidanak Astronomical Observatory in Uzbekistan and the Canada–France–Hawaii Telescope (CFHT), which is operated by the National Research Council of Canada, the Institut National des Sciences de l’Univers of the Centre National de la Recherche Scientifique of France, and the University of Hawaii.
Space sciences, Technologies and Astrophysics Research - STAR
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/211733
10.3847/1538-4365/aa6d76
http://adsabs.harvard.edu/abs/2017ApJS..230....3S

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