H-band images of IRAS 19312+1950 (Murakawa+, 2007)

Details H-band images of IRAS 19312+1950 (Murakawa+, 2007) H-band images of IRAS 19312+1950 (Murakawa+, 2007)

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007ycat..34700957m&link_type=abstract

VizieR On-line Data Catalog: J/A+A/470/957. Originally published in: 2007A&A...470..957M

Other

Stars: Giant, Infrared Sources, Polarization

Scientific paper

We obtained H-band polarimetric data of IRAS 19312+1950 using the near-infrared camera (CIAO) on the 8m Subaru telescope. In order to investigate the physical properties of the central star and the nebula, we performed dust radiative transfer modeling and compared the model results with the observed spectral energy distributions (SEDs), the radial profiles of the total intensity image, and the fraction of linear polarization map. The total intensity image shows a nearly spherical core with ~3" radius, an S-shaped arm extending ~10" in the northwest to southeast direction, and an extended lobe towards the southwest. The polarization map shows a centro-symmetric vector alignment in almost the entire nebula and low polarizations along the S-shaped arm. These results suggest that the nebula is accompanied by a central star, and the S-shaped arm has a physically ring-like structure. From our radiative transfer modeling, we estimated the stellar temperature, the bolometric luminosity, and the current mass-loss rate to be 2800K, 7000L{sun}, and 5.3x10-6M{sun}/yr, respectively. Taking into account previous observational results, such as the detection of SiO maser emissions and silicate absorption feature in the 10{mu}m spectrum, our dust radiative transfer analysis based on our NIR imaging polarimetry suggests that (1) the central star of IRAS 19312+1950 is likely to be an oxygen-rich, dust-enshrouded AGB star and (2) most of the circumstellar material originates from other sources (e.g. ambient dark clouds) rather than as a result of mass loss from the central star.
(1 data file).

Affiliated with

Also associated with

No associations

Rating

H-band images of IRAS 19312+1950 (Murakawa+, 2007) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with H-band images of IRAS 19312+1950 (Murakawa+, 2007), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and H-band images of IRAS 19312+1950 (Murakawa+, 2007) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1750744