The dusty environment of HD 97300 as seen by Herschel and Spitzer

Details The dusty environment of HD 97300 as seen by Herschel and Spitzer The dusty environment of HD 97300 as seen by Herschel and Spitzer

2012-03-24

arxiv.org/abs/1203.5435v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

6 pages, 3 figures, accepted for publication in A&A

Scientific paper

Aims. We analyze the surroundings of HD 97300, one of two intermediate-mass stars in the Chamaeleon I star-forming region. The star is known to be surrounded by a conspicuous ring of polycyclic aromatic hydrocarbons (PAHs). Methods. We present infrared images taken with Herschel and Spitzer using 11 different broad-band filters between 3.6 um and 500 um. We compare the morphology of the emission using cuts along different position angles. We construct spectral energy distributions, which we compare to different dust models, and calculate dust temperatures. We also derive opacity maps and analyze the density structure of the environment of HD 97300. Results. We find that HD 97300 has no infrared excess at or below 24 um, confirming its zero-age main-sequence nature. The morphology of the ring is very similar between 3.6 um and 24 um. The emission at these wavelengths is dominated by either PAH features or PAH continuum. At longer wavelengths, only the northwestern part of the ring is visible. A fit to the 100-500 um observations suggests that the emission is due to relatively warm (~26 K) dust. The temperature gradually decreases with increasing distance from the ring. We find a general decrease in the density from north to south, and an approximate 10% density increase in the northeastern part of the ring. Conclusions. Our results are consistent with the theory that the ring around HD 97300 is essentially a bubble blown into the surrounding interstellar matter and heated by the star.

Affiliated with

Also associated with

No associations

Rating

The dusty environment of HD 97300 as seen by Herschel and Spitzer 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 The dusty environment of HD 97300 as seen by Herschel and Spitzer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The dusty environment of HD 97300 as seen by Herschel and Spitzer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-39224