J/A+A/541/A52 Polarization efficiency and dust phase (Voshchinnikov+, 2012)
Interstellar polarization and grain alignment: the role of iron and silicon.
Voshchinnikov N.V., Henning T., Prokopjeva M.S., Das H.K.
<Astron. Astrophys., 541, A52-52 (2012)>
=2012A&A...541A..52V 2012A&A...541A..52V
ADC_Keywords: Interstellar medium ; Polarization
Keywords: dust, extinction - ISM: abundances - polarization
Abstract:
We compiled the polarimetric data for a sample of lines of sight
with known abundances of Mg, Si, and Fe. We correlated the degree of
interstellar polarization P and polarization efficiency (the ratio of
P to the colour excess E(B-V) or extinction AV) with dust phase
abundances. We detect an anticorrelation between P and the dust phase
abundance of iron in non silicate-containing grains [Fe(rest)/H]d, a
correlation between P and the abundance of Si, and no correlation
between P/E(B-V) or P/AV and dust phase abundances. These findings can
be explained if mainly the silicate grains aligned by the radiative
mechanism are responsible for the observed interstellar linear
polarization.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 117 196 Polarization of stars with known dust phase
abundances
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See also:
II/226 : Stellar polarization catalogs agglomeration (Heiles, 2000)
J/AJ/105/258 : UBVRI polarimetry in Car Nebula (Marraco+ 1993)
J/A+A/384/1050 : Interstellar polarization. VI. (Berdyugin+, 2002)
J/A+A/489/911 : Polarimetric measures of selected variable stars (Elias+ 2008)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1/196] Sequential number
4- 5 A2 --- n_Seq [vsmi ] Note on the observation (1)
7- 18 A12 --- Star Star name
20- 25 F6.2 deg GLON Galactic longitude
27- 32 F6.2 deg GLAT Galactic latitude
34- 44 A11 --- SpType MK spectral type
47- 50 I4 pc Dist Heliocentric distance
52- 57 F6.3 mag E(B-V) Redenning
58- 62 F5.2 mag AV ?=- Absorption on V band
64- 67 F4.2 mag e_AV ? rms uncertainty on AV
69- 73 F5.3 % P ?=- Degree of interstellar polarization
75- 80 F6.4 % e_P ? rms uncertainty on P
82- 86 F5.2 % P/E ?=- Polarization efficiency P/E(B-V)
88- 92 F5.2 % e_P/E ? rms uncertainty on P/E(B-V)
94- 97 F4.2 % P/A ?=- Polarization efficiency P/AV
99-102 F4.2 % e_P/A ?=- rms uncertainty on P/AV
104-108 F5.2 [-] [Fer/H]d ?=- Dust phase abundance of iron in non
silicate-containing grains,
[Fe(rest)/H]d = [Fe/H]d-(2[Si/H]d-[Mg/H]d)
110-114 F5.2 [-] e_[Fer/H]d ?=- rms uncertainty on [Fe(rest)/H]d
116-117 I2 --- Ref ? Reference (2)
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Note (1): Notes as follows:
v = variable star
s = star with peculiar spectrum
m = maximum polarization Pmax (wavelength dependence of polarization is known)
i = interstellar polarization.
Note (2): References for observational data as follows:
1 = Heiles (2000AJ....119..923H 2000AJ....119..923H, Cat. II/226)
2 = Ghosh et al. (1999AJ....118.1061G 1999AJ....118.1061G)
3 = this paper
4 = Anderson & Wannier (1997ApJ...491L.103A 1997ApJ...491L.103A)
5 = Serkowski et al. (1975ApJ...196..261S 1975ApJ...196..261S)
6 = Roche et al. (1997A&A...322..139R 1997A&A...322..139R)
7 = Efimov (2009, Bull. CrAO, 105, 82)
8 = Martin et al. (1999ApJ...510..905M 1999ApJ...510..905M)
9 = McDavid (2000AJ....119..352M 2000AJ....119..352M)
10 = Leroy & Le Borgne (1987A&A...186..322L 1987A&A...186..322L)
11 = Oudmaijer & Drew (1999MNRAS.305..166O 1999MNRAS.305..166O)
12 = Vink et al. (2009A&A...505..743V 2009A&A...505..743V)
13 = Marracco et al. (1993, Cat. J/AJ/105/258)
14 = Berdyugin et al. (in prep.)
15 = Weitenbeck (2008AcA....58..433W 2008AcA....58..433W)
16 = Das et al. (2010MNRAS.404..265D 2010MNRAS.404..265D)
17 = Poeckert et al. (1979AJ.....84..812P 1979AJ.....84..812P)
18 = Harries et al. (2002MNRAS.337..341H 2002MNRAS.337..341H)
19 = Elias et al. (2008, Cat. J/A+A/489/911)
20 = Larson et al. (1996ApJ...472..755L 1996ApJ...472..755L)
21 = Vega et al. (1994AJ....108.1834V 1994AJ....108.1834V)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 09-Jul-2012