2007A&A...472..199F -
Astronomy and Astrophysics, volume 472, 199-205 (2007/9-2)
Optical and infrared properties of V1647 Orionis during the 2003-2006 outburst. I. The reflection nebula.
FEDELE D., VAN DEN ANCKER M.E., PETR-GOTZENS M.G., AGEORGES N. and RAFANELLI P.
Abstract (from CDS):
The recent outburst of the young eruptive star
V1647 Orionis has produced a spectacular appearance of a new reflection nebula in Orion (
McNeil's nebula). We present an optical/near infrared investigation of McNeil's nebula. This analysis is aimed at determining the morphology, temporal evolution and nature of the nebula and its connection to the outburst. We performed multi epoch B, V, R
C, I
C, z
gunn, and K
S imaging of McNeil's nebula and V1647 Ori as well as K
S imaging polarimetry. The multiband imaging allows us to reconstruct the extinction map inside the nebula. Through polarimetric observations we attempt to disentangle the emission from the nebula from that of the accretion disk around V1647 Ori. We also attempt to resolve the small spatial scale structure of the illuminating source. The energy distribution and temporal evolution of McNeil's nebula mimic that of the illuminating source. The extinction map reveals a region of higher extinction in the direction of V1647 Ori. Excluding foreground extinction, the optical extinction due to McNeil's nebula in the direction of V1647 Ori is A
V∼6.5mag. The polarimetric measurement shows a compact high polarization emission around V1647 Ori. The percentage of K
S band linear polarization goes from 10-20%. The vectors are all well aligned with a position angle of 90°±9° East of North. This may correspond to the orientation of a possible accretion disk around V1647 Ori. These findings suggest that the appearance of McNeil's nebula is due to reflection of light by pre-existing material in the surroundings of V1647 Ori. We also report on the discovery of a new candidate brown dwarf or protostar in the vicinity of V1647 Ori as well as the presence of clumpy structure within
HH 22A.
Abstract Copyright:
∼
Journal keyword(s):
accretion, accretion disks - ISM: reflection nebulae - stars: planetary systems: protoplanetary disks - ISM: Herbig-Haro objects
CDS comments:
Fig.3: Clumps C1 to C3 in the vicinity of HH 22A are not in SIMBAD. Fig.4: the point-source S = EQ J054613.4-000544.
Simbad objects:
12
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