2007ApJ...662..389G


C.D.S. - SIMBAD4 rel 1.7 - 2019.09.19CEST15:54:14

2007ApJ...662..389G - Astrophys. J., 662, 389-394 (2007/June-2)

Diffraction-limited 3 µm spectroscopy of IRAS 04296+3429 and IRAS 05341+0852: spatial extent of hydrocarbon dust emission and dust evolutionary sequence.

GOTO M., KWOK S., TAKAMI H., HAYASHI M., GAESSLER W., HAYANO Y., IYE M., KAMATA Y., KANZAWA T., KOBAYASHI N., MINOWA Y., NEDACHI K., OYA S., PYO T.-S., SAINT-JACQUES D., TAKATO N., TERADA H. and HENNING T.

Abstract (from CDS):

We present 3 µm spectroscopy of the carbon-rich protoplanetary nebulae IRAS 04296+3429 and IRAS 05341+0852, conducted with the adaptive optics system at the Subaru Telescope. We utilize the nearly diffraction-limited spectroscopy to probe the spatial extent of the hydrocarbon dust emitting zone. We find a hydrocarbon emission core extending up to 100-160 mas from the center of IRAS 04296+3429, corresponding to a physical diameter of 400-640 AU, assuming a distance of 4 kpc. However, we find that IRAS 05341+0852 is not spatially resolved with this instrumentation. The physical extent of these protoplanetary nebulae, along with the reanalyzed data of IRAS 22272+5435 published previously, suggests a correlation between the physical extent of the hydrocarbon dust emission and the spectral evolution of the aliphatic to aromatic features in these post-AGB stars. These measurements represent the first direct test of the proposed chemical synthesis route of carbonaceous dust in the circumstellar environment of evolved stars.

Abstract Copyright:

Journal keyword(s): Stars: Circumstellar Matter - ISM: Dust, Extinction - Infrared: ISM - ISM: Evolution - Stars: AGB and Post-AGB - Stars: Individual: Alphanumeric: IRAS 04296+3429 - stars: individual (IRAS 05341+0852) - Stars: Individual: Alphanumeric: IRAS 22272+5435

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 * del Tri SB* 02 17 03.2353876410 +34 13 27.243444846 5.50 5.48   4.5   G0.5VFe-0.5 367 0
2 IRAS 04296+3429 pA* 04 32 56.9768181234 +34 36 12.505781495   16.20 14.21   11.64 G0Ia 134 0
3 IRAS 05341+0852 pA* 05 36 55.0500719686 +08 54 08.646055747   15.36 13.55 12.46 11.43 F6I 104 0
4 HD 235858 pA* 22 29 10.3755939027 +54 51 06.341145584   11.40 9.52 8.47 7.34 G5Ia 232 0

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