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J/A+AS/111/399 Polarization variability in Herbig Ae/Be stars (Jain+, 1995)
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Study of variability of the polarization in Herbig Ae/Be stars
Jain S.K., Bhatt H.C.
<Astron. Astrophys. Suppl. Ser. 111, 399 (1995)>
=1995A&AS..111..399J (SIMBAD/NED Reference)
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ADC_Keywords: Stars, early-type; Polarization
Keywords: stars: emission-line, Ae - polarization - stars: variable -
stars: pre-main sequence
Description:
We report our measurements of linear polarization of a number of Herbig Ae/Be
stars made at several epochs during the period 1989-1993. These results
together with the observations compiled from the published sources have been
analysed to study the variability of polarization in Herbig Ae/Be stars.
It is found that polarimetric variability is a common feature of this class
of objects. Most of the objects are variable on time scales >=1yr.
Some objects have shown large variations on time scales as short as ~1 month
indicating structural changes in the distribution of circumstellar matter
close to the star within a few tens of stellar radii. Variations in the
polarization position angle are not always correlated with variations in the
degree of polarization.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1 114 91 Polarimetric data for Herbig Ae/Be stars
table1.tex 81 415 TeX version of table1
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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- 2 I2 --- SN Sequential number
3- 16 A14 ---- Name Object name
17- 26 A10 --- Date observation date
28- 31 F4.2 % pU []? Degree of polarization in U filter
33- 36 F4.2 % e_pU []? rms uncertainty on pU
38- 40 I3 deg paU []? Position angle in U filter
42- 43 I2 deg e_paU []? rms uncertainty on paU
45- 48 F4.2 % pB []? Degree of polarization in B filter
50- 53 F4.2 % e_pB []? rms uncertainty on pB
55- 57 I3 deg paB []? Position angle in B filter
59- 60 I2 deg e_paB []? rms uncertainty on paB
62- 65 F4.2 % pV []? Degree of polarization in V filter
67- 70 F4.2 % e_pV []? rms uncertainty on pV
72- 74 I3 deg paV []? Position angle in V filter
76- 77 I2 deg e_paV []? rms uncertainty on paV
79- 82 F4.2 % pR []? Degree of polarization in R filter
84- 87 F4.2 % e_pR []? rms uncertainty on pR
89- 91 I3 deg paR []? Position angle in R filter
93- 94 I2 deg e_paR []? rms uncertainty on paR
96- 99 F4.2 % pI []? Degree of polarization in I filter
101-104 F4.2 % e_pI []? rms uncertainty on pI
106-108 I3 deg paI []? Position angle in I filter
110-111 I2 deg e_paI []? rms uncertainty on paI
113-114 I2 --- ref References (1)
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Note (1): References:
1 Present work
2 Garrison M. Jr, Anderson C.M. 1978, 221, 601
Bull. Astron.Soc.India, 21, 541
3 Jain S.K., Bhatt H.C., Ram Sagar, 1990, A&AS, 83, 237
4 Vbra F.J. 1975, ApJ, 195, 101
5 Vrba F.J. Schmidt G.D., Hintzen P.M. 1979, ApJ, 227, 185
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(End) Patricia Bauer [CDS] 21-Nov-1994