J/AJ/161/149 Vilnius photometry in IC 59 and IC 63 (Soam+, 2021)
Interstellar extinction, polarization, and grain alignment in the Sh2-185
(IC 59 and IC 63) region.
Soam A., Andersson B.-G., Straizys V., Caputo M., Kazlauskas A., Boyle R.P.,
Janusz R., Zdanavicius J., Acosta-Pulido J.A.
<Astron. J., 161, 149 (2021)>
=2021AJ....161..149S 2021AJ....161..149S
ADC_Keywords: Nebulae; Interstellar medium; Polarization; Photometry, Vilnius;
Spectral types; Extinction
Keywords: Interstellar dust ; Starlight polarization
Abstract:
Optical and infrared continuum polarization from the interstellar
medium is driven by radiative processes aligning the grains with the
magnetic field. While a quantitative, predictive theory of radiative
alignment torques (RATs) exists and has been extensively tested,
several parameters of the theory remain to be fully constrained. In a
recent paper, Medan & Andersson showed that the polarization
efficiency (and therefore grain alignment efficiency) at different
locations in the wall of the Local Bubble (LB) could be modeled as
proportional to the integrated light intensity from the surrounding
stars and OB associations. Here we probe that relationship at high
radiation field intensities by studying the extinction and
polarization in the two reflection nebulae IC59 and IC63 in the
Sh2-185 HII region, illuminated by the B0 IV star γCassiopeia.
We combine archival visual polarimetry with new seven-band photometry
in the Vilnius system, to derive the polarization efficiency from the
material. We find that the same linear relationship seen in the LB
wall also applies to the Sh2-185 region, strengthening the conclusion
from the earlier study.
Description:
CCD observations in the Vilnius seven-color photometric system of two
13'x13' areas, centered on the nebulae IC59 and IC63, were obtained
with the 1.8m Vatican Advanced Technology Telescope (VATT) telescope
on Mt.Graham, Arizona, using the STA0500A camera and a 4x4k CCD chip.
Observations in table 1 and 2.
To cover all the stars with the available polarization data, another
set of CCD exposures with a 35'x35' field of view were obtained with
the Maksutov-type 35/50cm telescope of the Moletai Observatory in
Lithuania, using an Apogee Alta U-47 CCD camera. Observations in table 3.
Optical imaging (R-band) polarization measurements of nebulae IC59 and
IC63 were also extracted from Soam+, 2017, J/MNRAS/465/559. These
observations were acquired with the Aries Imaging Polarimeter (AIMPOL)
mounted in the Cassegrain focus of the 104 cm optical telescope,
India. Observations in table 4.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 132 124 Results of photometry and classification of stars
in the Vilnius system for the IC 59 stars with
the VATT telescope
table2.dat 132 185 Results of photometry and classification of stars
in the Vilnius system for the IC 63 stars with
the VATT telescope
table3.dat 132 487 Results of photometry and classification of stars
in the Vilnius system for the IC59 and IC63 stars
with the Maksutov-type telescope
table4.dat 79 204 Polarization and extinction measurements towards
IC 59 and IC 63
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See also:
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
III/231 : The Tycho-2 Spectral Type Catalog (Wright+, 2003)
I/347 : Distances to 1.33 billion stars Gaia DR2 (Bailer-Jones+, 2018)
J/ApJS/141/469 : Linear polarization catalog toward HD 62542 (Pereyra+, 2002)
J/A+A/411/447 : Interstellar NaI D-line (Lallement+, 2003)
J/ApJ/665/369 : Photopolarimetry of Southern Coalsack stars (Andersson+, 2007)
J/ApJS/182/143 : SCUPOL Legacy polarimetry of SCUBA (Matthews+, 2009)
J/ApJ/741/21 : Polarization of stars in Taurus (Chapman+, 2011)
J/ApJS/201/13 : Submm polarization of Galactic clouds (Vaillancourt+, 2012)
J/ApJ/775/84 : Polarization from stars behind IC63 nebula (Andersson+, 2013)
J/A+A/554/A3 : Vilnius photometry of IC1805 stars (Straizys+, 2013)
J/A+A/569/L1 : Polarization hole in a starless core (Alves+, 2014)
J/A+A/561/A24 : Polarization at high galactic latitude (Berdyugin+, 2014)
J/ApJ/793/126 : L204 - Cloud 3 polarimetry and photometry (Cashman+, 2014)
J/MNRAS/465/559 : IC 63 and IC 59 magnetic field structure (Soam+, 2017)
J/MNRAS/487/2771 : Gaia-DR2 distance to the W3 Complex (Navarete+, 2019)
J/A+A/623/A22 : IC 4996 Vilnius phot. and Gaia DR2 astrometry (Straizys+,2019)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq [1/124] Sequential number identifier
5- 6 I2 h RAh [0] Hour of Right Ascension (J2000)
8- 9 I2 min RAm [56/58] Minute of Right Ascension (J2000)
11- 15 F5.2 s RAs Second of Right Ascension (J2000)
17- 17 A1 --- DE- [+] Sign of the Declination (J2000)
18- 19 I2 deg DEd [61] Degree of Declination (J2000)
21- 22 I2 arcmin DEm [3/14] Arcminute of Declination (J2000)
24- 27 F4.1 arcsec DEs Arcsecond of Declination (J2000)
29- 34 F6.3 mag Vmag [11.4/18.5] V band magnitude, Vilnius system (1)
36- 40 F5.3 mag U-V [1.86/5.75]? U-V color, Vilnius system (1)
42- 46 F5.3 mag P-V [1.51/4.74]? P-V color, Vilnius system (1)
48- 52 F5.3 mag X-V [1.01/3.38] X-V color, Vilnius system (1)
54- 58 F5.3 mag Y-V [0.49/1.38] Y-V color, Vilnius system (1)
60- 64 F5.3 mag Z-V [0.18/0.58] Z-V color, Vilnius system (1)
66- 70 F5.3 mag V-S [0.42/1.26] V-S color, Vilnius system (1)
72- 76 F5.3 mag e_Vmag [0.01/0.04] Uncertainty in Vmag (2)
78- 82 F5.3 mag e_U-V [0.02/0.2]? Uncertainty in U-V (2)
84- 88 F5.3 mag e_P-V [0.02/0.09]? Uncertainty in P-V (2)
90- 94 F5.3 mag e_X-V [0.01/0.068] Uncertainty in X-V (2)
96-100 F5.3 mag e_Y-V [0.01/0.08] Uncertainty in Y-V (2)
102-106 F5.3 mag e_Z-V [0.01/0.06] Uncertainty in Z-V (2)
108-112 F5.3 mag e_V-S [0.01/0.04] Uncertainty in V-S (2)
114-119 A6 --- SpT Spectral type (3)
121-125 F5.3 mag AVmag [0.23/3.05] Reddening, V band (4)
127-132 F6.1 pc Dist [199/7008]? Gaia DR2 based distances (5)
--------------------------------------------------------------------------------
Note (1): Observations calibrated to the Vilnius seven-color system using
tie-in observations to the open cluster IC1805 using Vilnius photometry
published by Straizys+, 2013A&A...554A...3S 2013A&A...554A...3S.
Note (2): The uncertainties of V magnitudes, and color indices take into
account the measurement errors and the errors of transformation to the
standard system.
Note (3): Spectral and luminosity classes in the MK system determined from
the photometric data with the QCOMPAR code as described in
Straizys+, 2019, J/A+A/623/A22.
Note (4): Values AVmag of the measured stars were determined from their
color excesses E(Y-V), which are differences between the observed and
the intrinsic color indices (Y?V)0 taken from
Straizys+, 1992msp..book.....S 1992msp..book.....S: E(Y-V)=(Y-V)obs?(Y-V)0, AVmag=4.16*E(YV),
where the coefficient 4.16 corresponds to the normal extinction law.
Note (5): Bailer-Jones et al. (2018AJ....156...58B 2018AJ....156...58B)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq [1/185] Sequential number identifier
5- 6 I2 h RAh [0/1] Hour of Right Ascension (J2000)
8- 9 I2 min RAm Minute of Right Ascension (J2000)
11- 15 F5.2 s RAs Second of Right Ascension (J2000)
17- 17 A1 --- DE- [+] Sign of the Declination (J2000)
18- 19 I2 deg DEd [60/61] Degree of Declination (J2000)
21- 22 I2 arcmin DEm Arcminute of Declination (J2000)
24- 27 F4.1 arcsec DEs Arcsecond of Declination (J2000)
29- 34 F6.3 mag Vmag [11.3/18.2] V band magnitude, Vilnius system (1)
36- 40 F5.3 mag U-V [1.80/6.15]? U-V color, Vilnius system (1)
42- 46 F5.3 mag P-V [1.33/5.15]? P-V color, Vilnius system (1)
48- 52 F5.3 mag X-V [0.84/3.63] X-V color, Vilnius system (1)
54- 58 F5.3 mag Y-V [0.33/1.56] Y-V color, Vilnius system (1)
60- 64 F5.3 mag Z-V [0.11/0.59] Z-V color, Vilnius system (1)
66- 70 F5.3 mag V-S [0.29/1.36] V-S color, Vilnius system (1)
72- 76 F5.3 mag e_Vmag [0.01/0.05] Uncertainty in Vmag (2)
78- 82 F5.3 mag e_U-V [0.02/0.1]? Uncertainty in U-V (2)
84- 88 F5.3 mag e_P-V [0.02/0.07]? Uncertainty in P-V (2)
90- 94 F5.3 mag e_X-V [0.01/0.07] Uncertainty in X-V (2)
96-100 F5.3 mag e_Y-V [0.01/0.07] Uncertainty in Y-V (2)
102-106 F5.3 mag e_Z-V [0.01/0.08] Uncertainty in Z-V (2)
108-112 F5.3 mag e_V-S [0.01/0.07] Uncertainty in V-S (2)
114-119 A6 --- SpT Spectral type (3)
121-125 F5.3 mag AVmag [0.41/3.13] Reddening, V band (4)
127-132 F6.1 pc Dist [291/6769] Gaia DR2 based distances (5)
--------------------------------------------------------------------------------
Note (1): Observations calibrated to the Vilnius seven-color system using
tie-in observations to the open cluster IC1805 using Vilnius photometry
published by Straizys+, 2013A&A...554A...3S 2013A&A...554A...3S.
Note (2): The uncertainties of V magnitudes, and color indices take into
account the measurement errors and the errors of transformation to the
standard system.
Note (3): Spectral and luminosity classes in the MK system determined from
the photometric data with the QCOMPAR code as described in
Straizys+, 2019, J/A+A/623/A22.
Note (4): Values AVmag of the measured stars were determined from their
color excesses E(Y-V), which are differences between the observed and
the intrinsic color indices (Y?V)0 taken from
Straizys+, 1992msp..book.....S 1992msp..book.....S: E(Y-V)=(Y-V)obs?(Y-V)0, AVmag=4.16*E(YV),
where the coefficient 4.16 corresponds to the normal extinction law.
Note (5): Bailer-Jones+, 2018AJ....156...58B 2018AJ....156...58B
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq [1/487] Sequential number identifier
5- 6 I2 h RAh [0/1] Hour of Right Ascension (J2000)
8- 9 I2 min RAm Minute of Right Ascension (J2000)
11- 15 F5.2 s RAs Second of Right Ascension (J2000)
17- 17 A1 --- DE- [+] Sign of the Declination (J2000)
18- 19 I2 deg DEd [60/61] Degree of Declination (J2000)
21- 22 I2 arcmin DEm Arcminute of Declination (J2000)
24- 27 F4.1 arcsec DEs Arcsecond of Declination (J2000)
29- 34 F6.3 mag Vmag [10.22/16.68] V band magnitude, Vilnius system (1)
36- 40 F5.3 mag U-V [1.66/4.88]? U-V color, Vilnius system (1)
42- 46 F5.3 mag P-V [1.18/5.29]? P-V color, Vilnius system (1)
48- 52 F5.3 mag X-V [0.72/3.63] X-V color, Vilnius system (1)
54- 58 F5.3 mag Y-V [0.33/1.44] Y-V color, Vilnius system (1)
60- 64 F5.3 mag Z-V [0.14/0.61] Z-V color, Vilnius system (1)
66- 70 F5.3 mag V-S [0.25/1.3]? V-S color, Vilnius system (1)
72- 76 F5.3 mag e_Vmag [0.02/0.2] Uncertainty in Vmag (2)
78- 82 F5.3 mag e_U-V [0.03/0.2]? Uncertainty in U-V (2)
84- 88 F5.3 mag e_P-V [0.03/0.2]? Uncertainty in P-V (2)
90- 94 F5.3 mag e_X-V [0.02/0.2] Uncertainty in X-V (2)
96-100 F5.3 mag e_Y-V [0.02/0.2] Uncertainty in Y-V (2)
102-106 F5.3 mag e_Z-V [0.02/0.2] Uncertainty in Z-V (2)
108-112 F5.3 mag e_V-S [0.02/0.2]? Uncertainty in V-S (2)
114-119 A6 --- SpT Spectral type (3)
121-125 F5.3 mag AVmag [0/3.27] Reddening, V band (4)
127-132 F6.1 pc Dist [153/7654] Gaia DR2 based distances (5)
--------------------------------------------------------------------------------
Note (1): Observations calibrated to the Vilnius seven-color system using
tie-in observations to the open cluster IC1805 using Vilnius photometry
published by Straizys+, 2013A&A...554A...3S 2013A&A...554A...3S.
Note (2): The uncertainties of V magnitudes, and color indices take into
account the measurement errors and the errors of transformation to the
standard system.
Note (3): Spectral and luminosity classes in the MK system determined from
the photometric data with the QCOMPAR code as described in
Straizys+, 2019, J/A+A/623/A22.
Note (4): Values AVmag of the measured stars were determined from their
color excesses E(Y-V), which are differences between the observed and
the intrinsic color indices (Y?V)0 taken from
Straizys+, 1992msp..book.....S 1992msp..book.....S: E(Y-V)=(Y-V)obs?(Y-V)0, AVmag=4.16*E(YV),
where the coefficient 4.16 corresponds to the normal extinction law.
Note (5): Bailer-Jones+, 2018AJ....156...58B 2018AJ....156...58B
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- Cluster Cluster; IC 59 or IC 63
6- 8 I3 --- Seq [1/126] Sequential identifier in cluster
10- 11 I2 h RAh [0/1] Hour of Right Ascension (J2000)
13- 14 I2 min RAm Minute of Right Ascension (J2000)
16- 20 F5.2 s RAs Second of Right Ascension (J2000)
22- 22 A1 --- DE- [+] Sign of the Declination (J2000)
23- 24 I2 deg DEd [60/61] Degree of Declination (J2000)
26- 27 I2 arcmin DEm Arcminute of Declination (J2000)
29- 32 F4.1 arcsec DEs Arcsecond of Declination (J2000)
34- 36 F3.1 % Pol [0.5/5.9] Polarization, degree
38- 40 F3.1 % e_Pol [0/2] Uncertainty in Pol
42- 48 F7.3 deg Theta [49.3/136.7] Polarization, position angle
50- 55 F6.3 deg e_Theta [0.5/12.3] Uncertainty in Theta
57- 62 F6.3 mag Vmag [11.3/17.7] Vmag V band magnitude, Vilnius
system (1)
64- 68 F5.3 mag e_Vmag [0.2/3.1] Uncertainty in Vmag
70- 73 I4 pc Dist [199/7654] Dist Gaia DR2 based distances (2)
75- 79 F5.3 %/mag Pol/AVmag [0.36/9.44] Polarization efficiency (3)
--------------------------------------------------------------------------------
Note (1): Observations calibrated to the Vilnius seven-color system using
tie-in observations to the open cluster IC1805 using Vilnius photometry
published by Straizys+, 2013A&A...554A...3S 2013A&A...554A...3S.
Note (2): Bailer-Jones+, 2018AJ....156...58B 2018AJ....156...58B
Note (3): Polarization efficiency denotes the observed line-of-sight averaged
ratio of polarization and extinction (P/AV).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 03-May-2021