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Dibs independent of accretion in t tauri stars
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hartigan, P. Ghandour, Louma Jenniskens, Peter |
| Copyright Year | 1994 |
| Description | The examination of high resolution spectra (5200 - 7000 Angstroms) of 36 T Tauri stars ranging in accretion rates was performed. Only the lambda lambda 5780, 5797, and 6613 bands were found detectable to within an equivalent width of 10 micro Angstroms. They are strongest in DG Tau, DR Tau, Dl Tau, and AS 353A. DR Tau was monitored over the course of four years; during this time, the accretion rate varied by a factor of five, but the equivalent widths of the DIB's (Diffuse Interstellar Bands) remained constant. The lack of correlation of the strength of the bands with the accretion rates implies that the bands are not directly produced by UV radiation from the accretion process. The bands have line strengths and ratios characteristic of the diffuse interstellar medium, from which we conclude that the diffuse interstellar bands seen in the spectra of T Tauri stars do not originate in the stars' immediate environment. Instead, they are part of a foreground extinction, probably due to the parent molecular cloud. |
| File Size | 191091 |
| Page Count | 4 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19950009414 |
| Archival Resource Key | ark:/13960/t8ff8q07m |
| Language | English |
| Publisher Date | 1994-05-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Stellar Spectra Ultraviolet Radiation Interstellar Extinction Molecular Clouds Spectral Bands Bandwidth Absorption Spectra T Tauri Stars Continuous Spectra Accretion Disks Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
