J/AJ/110/268 Red and infrared polarimetry in galactic plane (Creese+ 1995)
Red and infrared polarimetry of highly reddened stars in the galactic plane.
Creese M., Jones T.J., Kobulnicky H.A.
<Astron. J. 110, 268 (1995)>
=1995AJ....110..268C 1995AJ....110..268C
ADC_Keywords: Polarization ; Photometry, infrared
Abstract:
We present VRIJHK polarimetry and JHK photometry of highly reddened
stars found in an objective prism survey published by Stephenson
(1992AJ....103..263S 1992AJ....103..263S). The JHK colors of these stars are consistent
with interstellar extinction as the dominant source of the reddening.
The distribution of the polarization position angles in Galactic
coordinates is very similar to previous optical polarimetry surveys
such as Mathewson & Ford ([MNRAS, 74, 139 (1970)]. However, for the
redder stars with IR polarimetry, the polarization strength is
moderately lower than expected for the amount of extinction. We
postulate that the line of sight to many of these stars samples
specific regions where the grain population has poor polarizing
properties, while the remainder of the line of sight is similar to the
paths sampled by previous optical surveys. The wavelength dependence
of the polarization from 1-2.5µm for this sample of stars shows
weak evidence for a greater departure from the mean for interstellar
polarization than for most published near-infrared polarimetry.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1 104 24 VRIJHK polarimetry
table2 32 103 R band polarimetry
table3 57 68 JHK photometry
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Byte-by-byte Description of file: table1
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Bytes Format Units Label Explanations
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1- 3 I3 --- Star Star number from Stephenson (1992)
6- 9 F4.1 % PolV ? Polarisation in V filter
12- 14 F3.1 % e_PolV ? rms uncertainty on PV
17- 19 I3 deg PAV ? Position angle in V filter
22- 25 F4.1 % PolR ? Polarisation in R filter
29- 31 F3.1 % e_PolR ? rms uncertainty on PR
34- 36 I3 deg PAR ? Position angle in R filter
39- 42 F4.1 % PolI ? Polarisation in I filter
45- 47 F3.1 % e_PolI ? rms uncertainty on PI
52- 54 I3 deg PAI ? Position angle in I filter
57- 59 F3.1 % PolJ Polarisation in J filter
63- 65 F3.1 % e_PolJ rms uncertainty on PJ
69- 71 I3 deg PAJ Position angle in J filter
74- 76 F3.1 % PolH ? Polarisation in H filter
80- 82 F3.1 % e_PolH ? rms uncertainty on PH
85- 87 I3 deg PAH ? Position angle in H filter
91- 93 F3.1 % PolK ? Polarisation in K filter
97- 99 F3.1 % e_PolK ? rms uncertainty on PK
102-104 I3 deg PAK ? Position angle in K filter
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Byte-by-byte Description of file: table2
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Bytes Format Units Label Explanations
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1- 3 I3 --- Star Star number from Stephenson (1992)
9- 13 F5.2 % PolR Polarimetry in R filter
19- 22 F4.2 % e_PolR rms uncertainty on PR
28- 32 F5.1 deg PAR Position angle in R filter
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Byte-by-byte Description of file: table3
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Bytes Format Units Label Explanations
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1- 3 I3 --- Star Star number from Stephenson (1992)
9- 12 F4.2 mag Jmag J magnitude
18- 21 F4.2 mag e_Jmag rms uncertainty on J magnitude
27- 30 F4.2 mag Hmag H magnitude
36- 39 F4.2 mag e_Hmag rms uncertainty on H magnitude
45- 48 F4.2 mag Kmag K magnitude
54- 57 F4.2 mag e_Kmag rms uncertainty on K magnitude
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Courtesy: Terry Jones
(End) Patricia Bauer [CDS] 04-Apr-1996