J/A+A/483/209 Photometry of a stellar cluster near IRAS 07141-092 (Yun+, 2008)
A young double stellar cluster in an HII region, emerging from its parent
molecular cloud.
Yun J.L, Djupvik A.A., Delgado A.J., Alfaro E.J.
<Astron. Astrophys. 483, 209 (2008)>
=2008A&A...483..209Y 2008A&A...483..209Y
ADC_Keywords: Clusters, open ; Stars, pre-main sequence ; Photometry, UBVRI ;
Photometry, H-alpha ; Photometry, infrared
Keywords: stars: formation - stars: pre-main sequence - ISM: HII regions -
ISM: dust, extinction - ISM: individual objects: IRAS 07141-0920 -
ISM: individual objects: Sh2-294 (S294)
Abstract:
High-resolution optical UBVRI and Hα images obtained with ALFOSC
mounted on the Nordic Optical Telescope (NOT), near-infrared JHKS
images obtained with NOTCam at the Nordic Optical Telescope, and
VLT/ISAAC images obtained through the H2 (2.12µm) filter were
all used to make photometric and morphological studies of the point
sources and the nebula seen towards Sh2-294. Identification of PMS
members was done using three different methods: comparison with
isochrones in optical colour-magnitude diagrams and detection of
either near-IR excess or Hα emission.
Description:
We report the properties of a new young double stellar cluster in the
region towards IRAS 07141-0920 contained in the HII region Sh2-294.
High-resolution optical UBVRI and Halpha images, near-infrared JHKs
and H2 filter images were used to make photometric and morphological
studies of the point sources and the nebula seen towards Sh2-294. This
Table contains the optical and near-IR photometry of the point sources
found in this region, detected in at least one of our U, B, V, R, I,
and Hα images.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 158 1344 Photometric results and membership
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq Identification number (this work)
6- 15 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000)
17- 25 F9.6 deg DEdeg Declination in decimal degrees (J2000)
27- 31 F5.2 mag Vmag ?=99.99 V magnitude (1)
33- 37 F5.2 mag e_Vmag ?=99.99 error in V magnitude (1)
39- 43 F5.2 mag U-B ?=99.99 U-B colour index (1)
45- 49 F5.2 mag e_U-B ?=99.99 error in U-V (1)
51- 55 F5.2 mag B-V ?=99.99 B-V colour index (1)
57- 61 F5.2 mag e_B-V ?=99.99 error in B-V (1)
63- 67 F5.2 mag V-Rc ?=99.99 V-Rc colour index (1)
69- 73 F5.2 mag e_V-Rc ?=99.99 error in V-Rc (1)
75- 79 F5.2 mag V-Ic ?=99.99 V-Ic colour index (1)
81- 85 F5.2 mag e_V-Ic ?=99.99 error in V-Ic (1)
87- 91 F5.2 mag Rcmag ?=99.99 Rc magnitude (1)
93- 97 F5.2 mag e_Rcmag ?=99.99 error in Rc magnitude (1)
99-103 F5.2 mag Icmag ?=99.99 Ic magnitude (1)
105-109 F5.2 mag e_Icmag ?=99.99 error in Ic magnitude (1)
111-115 F5.2 mag R-Ha ?=99.99 R-Halpha index (1)
117-121 F5.2 mag Jmag ?=99.99 J magnitude (1)
123-127 F5.2 mag e_Jmag ?=99.99 error in J magnitude (1)
129-133 F5.2 mag Hmag ?=99.99 H magnitude (1)
135-139 F5.2 mag e_Hmag ?=99.99 error in H magnitude (1)
141-145 F5.2 mag Ksmag ?=99.99 Ks magnitude (1)
147-151 F5.2 mag e_Ksmag ?=99.99 error in Ks magnitude (1)
153 I1 --- Mm ?=- Membership assignment (2)
155 I1 --- IRex ?=- NIR excess (3)
157-158 I2 --- WEBDA ?=- ID number in WEBDA Data Base
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Note (1): A 99.99 entry indicates a non-detection.
Note (2): Membership assignment as follows:
1 = MS member
2 = membership assignment in 2 CM diagrams, V vs B-V, V-R, and V-I
3 = membership assignment in 3 CM diagrams, V vs U-B, B-V, V-R, and V-I
Note (3): NIR excess as follows:
0 = no IR excess from J-H/H-Ks diagram
1 = probable IR excess source
2 = bona-fide IR excess source
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Acknowledgements:
Yun J.L, yun(at)oal.ul.pt
(End) Patricia Vannier [CDS] 19-Mar-2008