Post on 11-Jan-2016
description
Tercera parte
Young ObjectsYoung Objects
Greene 01
SINGLE SCATTERING, Wood et al. (1996)
Scattering: Disks/EnvelopesScattering: Disks/Envelopes
SINGLE SCATTERING, Wood et al. (1996)
no-null polarization perpendicular to disk(edge-on)
null polarization (pole-on)
MULTIPLE SCATTERING, Bastien & Menard (1988)
no-null polarizationparallel to disk(edge-on)
MULTIPLE SCATTERING, Bastien & Menard (1988)
no-null polarizationparallel to disk
V1352 Aql (T Tau)V1352 Aql (T Tau)
10”
Hartigan et al. 1983
• Observed: 2005/jun/24, aperture: 1.25”
• P(H): [0.76 0.04] %, PA: 124.9°
• Binary system
• PA axis outflow: 106° (Hartigan et al. 1983)
• HH: 32A, 32B, 32C and 32D
• PA P(H) ~ parallel to axis jet.
• As the jet is perpendicular to disk:• PA P(H) ~ perpendicular to disk.
• Consistent with NIR pol. beeing produzed by SINGLE scattering in a optically THIN disk.
H
Jet
DG Tau (T Tau)DG Tau (T Tau)
[OI]6300 - continuum
H
Jet
Lavalley et al. (1997)
• Observed: 2005/oct/12, aperture: 1.25”
• P(H): [1.29 0.09] %, PA: 129.0°
• PA jet: 222° (Lavalley et al. 1997)
• PA P(H) is perpendicular to jet.
• As the jet is perpendicular to disk:• PA P(H) is // disk.
• Consistent with NIR pol. beeing produzed by MULTIPLE scattering in a optically THICK disk.
Envelopes of Evolved ObjectsEnvelopes of Evolved Objects
PPN Hen 3-1475PPN Hen 3-1475
Ueta et al. 00HST, .55m
Rodrigues et al. 03
PPN Hen 3-1475PPN Hen 3-1475LNA jun/05
PH (observed):(3.0 0.1)% @ 49.2°
(H)obs. // (optical)obs.
Model Disk/Torus: Opt. : optic. thickNIR : optic. thin (λ > K)
Opportunity TargetsOpportunity Targets(SNs, GRB)(SNs, GRB)
Leonard 06
Asymmetries in SNsAsymmetries in SNs
SN = unresolved source with electron-scattering atmosphere
SN2004bv (Ia)SN2004bv (Ia)
Pereyra & Magalhães 05
SN2004bv (Ia)SN2004bv (Ia)
Pereyra & Magalhães 05
SN: (0.11 0.02)% @ 119°Foreground: (0.12 0.02)% @ 163°
R ~ 14.5
SN2005af (II)SN2005af (II)
Pereyra & Magalhães 06
Carnegie Supernova Project site
Pereyra & Magalhães 06
Pereyra & Magalhães 06
Pereyra & Magalhães 06
Field stars:A: (0.58 ± 0.11)% @ 25°B: (0.06 ± 0.12)% @ 21°
GRB030329GRB030329
Afterglow optical polarization:R ~ 16(1.97 ± 0.48) % @ 83°
Magalhães et al. 2003
Asymmetric collapse
A
B
OT
LNA 03/mar/31 (R) 16’x16’
SpectropolarimetrySpectropolarimetryIAGPOL + EIFUIAGPOL + EIFU
EIFUEIFU
Lepine 00
EIFU 2D reconstructed image
Extracted fibers (aperture: 2pix = 2”)
Sky
Ordinary beam (O)
Extraordinary beam (E)
EO
EIFU + IAGPOL: DataEIFU + IAGPOL: Data
RY Tau (T Tau)RY Tau (T Tau)
Gemini image
RY Tau (T Tau)RY Tau (T Tau)
Bastien 2007: (Halpha – I) image
Axis Jet:<PA> ~ 115º
RY Tau (T Tau)RY Tau (T Tau)
(1.8 0.2)% @ (11 3)° (binned)
Observed pol.
ISP
Intrinsic pol.
Q
U
RY Tau (T Tau)RY Tau (T Tau)
Observed pol. (continuum):
(1.8 0.2)% @ (11 3)°
ISP:
2.8% @ 26° (Petrov et al. 99)
Intrinsic pol.:
(1.6 0.2)% @ 134°
Axis Jet:<PA> ~ 115º
Probably, optically thin disk
(Q,U) Diagram: (Q,U) Diagram: line polarization diagnosticline polarization diagnostic
A. Depolarization line:extended H source; ~
pollinear excursion in (Q,U)
B. Position Angle flipcompact H source; >
polloop in (Q,U)
C. Null effect:circular geometrydot in (Q,U)
C B
A
RY Tau (T Tau)RY Tau (T Tau)
int = 0.5 tan-1(U/Q) = (168 ± 11)°
Q
ULoop detected
SummarySummary
• A competitive polarimetric facility is available at brazilian LNA site
• Projects of medium/long term as monitoring or surveys are (and will be) the main focus of attention
• Collaborations with projects in optical and NIR polarimetry (and also spectropolarimetry) are welcomed.
THE ENDTHE END