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