J/AJ/162/224 King 7 Vilnius photometry. II. Extinctions (Straizys+, 2021)
Interstellar extinction in the direction of the open cluster King 7 and new
parameters of the cluster.
Straizys V., Kazlauskas A., Boyle R.P., Janusz R., Zdanavicius J.,
Raudeliunas S., Cernis K., Maskoliunas M., Macijauskas M., Cepas V.,
Semionov D.
<Astron. J., 162, 224-224 (2021)>
=2021AJ....162..224S 2021AJ....162..224S (SIMBAD/NED BibCode)
ADC_Keywords: Interstellar medium; Extinction; Photometry, Vilnius; Optical;
Colors; Spectral types
Keywords: Interstellar dust extinction
Abstract:
Interstellar extinction in two concentric square areas of the sizes
1.25x1.25deg2 and 0.2x0.2deg2 in the direction of open cluster
King7 is investigated applying two-dimensional photometric
classification of stars observed in the Vilnius seven-color
photometric system down to V=15.5mag (1084 stars) and 19.5mag (584
stars), respectively. The cluster members (284 stars) are identified
applying their coordinates, proper motions, and parallaxes taken from
the Gaia EDR3 catalog. New parameters of the cluster (distance,
diameter, interstellar extinction, and age) are obtained.
Photogeometric distances of stars are taken from Bailer-Jones et al.
(2021) based on the Gaia parallaxes from EDR3. Physically the cluster
is located at the outer edge of the Perseus spiral arm at d=2.74kpc,
its diameter is 9.6pc, the age is 175±25Myr, the earliest stars
are of spectral classes B6-B7. The average interstellar extinction
AV=4.24mag. From the radial velocities of CO and the Galactic
rotation curve we estimate distances to the nearby dust clouds TGU
H989 P2 and P3 at 650-670pc from the Sun.
Description:
CCD exposures of the investigated area in the Vilnius seven-color
system were obtained with the Maksutov-type 35/51cm telescope of the
Moletai Observatory in Lithuania. More details about observations and
their processing are given in Paper I (Zdanavicius+, 2010, J/BaltA/19/197).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 96 1084 List of 1084 stars in the 1.5deg2 King7 area
table2.dat 153 985 Catalog of 985 stars observed in the 0.04deg2
King7 area
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See also:
VII/20 : Catalogue of HII Regions (Sharpless 1959)
VII/244 : Atlas and Catalog of Dark Clouds (Dobashi+, 2005)
V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)
I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021)
J/BaltA/19/197 : King 7 Vilnius photometry (Zdanavicius+, 2010)
J/PASJ/63/S1 : Atlas and catalog of dark clouds based on 2MASS (Dobashi+, 2011)
J/A+A/558/A53 : Milky Way global survey star clusters. II. (Kharchenko+, 2013)
J/ApJ/783/130 : Parallaxes of high mass star forming regions (Reid+, 2014)
J/A+A/585/A31 : Vilnius photometry of TGU H994 P1 (Straizys+, 2016)
J/A+A/590/A21 : Vilnius photometry near Sh 2-205 (Straizys+, 2016)
J/MNRAS/470/3937 : 1876 open clusters multimembership catalog (Sampedro+, 2017)
J/A+A/618/A93 : Gaia DR2 open clusters in the Milky Way (Cantat-Gaudin+, 2018)
J/ApJ/885/131 : ∼200 high-mass SFR plx & proper motion with VLBI (Reid+, 2019)
J/A+A/633/A99 : Gaia DR2 open clusters in Milky Way. II (Cantat-Gaudin+, 2020)
J/A+A/640/A1 : Portrait Galactic disc (Cantat-Gaudin+, 2020)
J/AJ/159/95 : IC1369 Vilnius photo. & Gaia DR2 astrometry (Straizys+, 2020)
J/MNRAS/504/356 : Updated parameters of 1743 open clusters (Dias+, 2021)
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 [1/1549] Sequential number (1)
6- 7 I2 h RAh [03/04] Hour of Right ascension (J2000)
9- 10 I2 min RAm Minute of Right ascension (J2000)
12- 16 F5.2 s RAs Second of Right ascension (J2000)
18 A1 --- DE- [+] Sign of the Declination (J2000)
19- 20 I2 deg DEd [51/52] Degree of Declination (J2000)
22- 23 I2 arcmin DEm Arcminute of Declination (J2000)
25- 28 F4.1 arcsec DEs Arcsecond of Declination (J2000)
30- 35 F6.3 mag Vmag [8.21/15.5] Apparent V magnitude; Vilnius system
37- 42 F6.3 mag U-V [1.37/6.65]? U-V color index; Vilnius system
44- 49 F6.3 mag P-V [1.05/5.76]? P-V color index; Vilnius system
51- 56 F6.3 mag X-V [0.67/4.15] X-V color index; Vilnius system
58- 63 F6.3 mag Y-V [0.29/1.65] Y-V color index; Vilnius system
65- 70 F6.3 mag Z-V [0.1/0.72] Z-V color index; Vilnius system
72- 77 F6.3 mag V-S [0.2/1.55]? V-S color index; Vilnius system
79- 84 A6 --- SpT Photometric spectral type (2)
86- 90 F5.2 mag AV [0/5.53] Interstellar extinction
92- 96 I5 pc dphg [28/4583]? Photogeometric distance (3)
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Note (1): Numbers from Zdanavicius+, 2010, J/BaltA/19/197
Note (2): Photometric spectral types are given in lower case letters
Note (3): From Bailer-Jones+, 2018AJ....161..141B 2018AJ....161..141B
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Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
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1- 4 I4 --- Seq [1/985] Sequential number
6- 7 I2 h RAh [03] Hour of Right Ascension (J2000)
9- 10 I2 min RAm [58/59] Minute of Right Ascension (J2000)
12- 16 F5.2 s RAs Second of Right Ascension (J2000)
18 A1 --- DE- [+] Sign of the Declination (J2000)
19- 20 I2 deg DEd [51] Degree of Declination (J2000)
22- 23 I2 arcmin DEm [41/53] Arcminute of Declination (J2000)
25- 28 F4.1 arcsec DEs Arcsecond of Declination (J2000)
31- 36 F6.3 mag Vmag [10.6/20.8] Apparent V magnitude; Vilnius system
38- 43 F6.3 mag U-V [0.94/7.18]? U-V color index; Vilnius system
45- 50 F6.3 mag P-V [-9.99/6.48]? P-V color index; Vilnius system
52- 57 F6.3 mag X-V [0.73/4.9] X-V color index; Vilnius system
59- 64 F6.3 mag Y-V [0.26/2.18] Y-V color index; Vilnius system
66- 71 F6.3 mag Z-V [0.07/0.86]? Z-V color index; Vilnius system
73- 78 F6.3 mag V-S [0.1/2.25]? V-S color index; Vilnius system
80- 85 F6.3 mag e_Vmag [0.01/0.08] Error in Vmag
87- 92 F6.3 mag e_U-V [0.02/0.3]? Error in U-V
94- 99 F6.3 mag e_P-V [0.03/0.4]? Error in P-V
101-106 F6.3 mag e_X-V [0.02/0.2] Error in X-V
108-113 F6.3 mag e_Y-V [0.01/0.2] Error in Y-V
115-120 F6.3 mag e_Z-V [0.01/0.2]? Error in Z-V
122-127 F6.3 mag e_V-S [0.02/0.2]? Error in V-S
129-135 A7 --- SpT ? photometric spectral type (1)
137-141 F5.2 mag AV [0/8.34]? interstellar extinction
143-147 I5 pc dphg [161/12069]? photogeometric distance (2)
149-153 F5.2 --- prob [0/1]? membership probability
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Note (1): Photometric spectral types are given in lower case letters
Note (2): From Bailer-Jones+, 2018AJ....161..141B 2018AJ....161..141B.
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History:
From electronic version of the journal
References:
Zdanavicius et al. Paper I : 2010BaltA..19..197Z 2010BaltA..19..197Z Cat. J/BaltA/19/197
(End) Prepared by [AAS], Coralie Fix [CDS], 17-Feb-2022