HST/NICMOS Imaging of Disks and Envelopes Around Very Young Stars

Details HST/NICMOS Imaging of Disks and Envelopes Around Very Young Stars HST/NICMOS Imaging of Disks and Envelopes Around Very Young Stars

1999-02-06

arxiv.org/abs/astro-ph/9902101v1

Astron.J.117:1490-1504,1999

Astronomy and Astrophysics

Astrophysics

34 pages, 4 figures; also available at http://spider.ipac.caltech.edu/staff/brandner/topics/disks/disks.html ; accepted for

Scientific paper

10.1086/300781

We present HST/NICMOS observations with 0.1" (15 AU) resolution of six young stellar objects in the Taurus star-formation region. The targets of our survey are three Class I IRAS sources (IRAS 04016+2610, IRAS 04248+2612, and IRAS 04302+2247) and three low-luminosity stars (DG Tau B, Haro 6-5B, and CoKu Tau/1) associated with Herbig Haro jets. The broad-band images show that the near-infrared radiation from these sources is dominated by light scattered from dusty circumstellar material distributed in a region 10 - 15 times the size of our solar system. Although the detailed morphologies of the individual objects are unique, the observed young stellar objects share common features. All of the circumstellar reflection nebulae are crossed by dark lanes from 500 - 900 AU in extent and from less than 50 to 350 AU in apparent thickness. The absorption lanes extend perpendicular to known optical and millimeter outflows in these sources. We interpret the dark lanes as optically thick circumstellar disks seen in silhouette against bright reflection nebulosity. The bipolar reflection nebulae extending perpendicular to the dust lanes appear to be produced by scattering from the upper and lower surfaces of the disks and from dusty material within or on the walls of the outflow cavities. Out of five objects in which the central source is directly detected, two are found to be subarcsecond binaries. This mini-survey is the highest resolution near-infrared study to date of circumstellar environments around solar-type stars with age <= 1 Myr.

Affiliated with

Also associated with

No associations

Rating

HST/NICMOS Imaging of Disks and Envelopes Around Very Young Stars 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 HST/NICMOS Imaging of Disks and Envelopes Around Very Young Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and HST/NICMOS Imaging of Disks and Envelopes Around Very Young Stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-597910