| |
 |
| Paper: |
A Short Wavelength IUE Atlas of Pre-Main-Sequence Stars |
| Volume: |
154, Cool Stars, Stellar Systems and the Sun: Tenth Cambridge Workshop |
| Page: |
1724 |
| Authors: |
Johns-Krull, Christopher M.; Valenti, Jeff A.; Linsky, Jeffrey L. |
| Abstract: |
We present an atlas of IUE low-dispersion short-wavelength spectra of pre-main-sequence (PMS) stars. These spectra are coadditions from all useful images which have been reprocessed with NEWSIPS and placed in the IUE final archive. Compared to the earlier processing of the spectra with IUESIPS, each spectrum has significantly higher signal/noise and most blemishes and cosmic ray hits are now removed. Since most of the fixed pattern noise is removed by NEWSIPS, the spectra can be coadded with considerable increase in signal/noise. Using the available lists of PMS stars we have identified 128 objects observed by IUE, including 50 T Tauri stars and 78 Herbig Ae/Be stars. 663 usable spectra are available from the IUE Final Archive for these targets, and our atlas consists of coadded spectra for each star based on up to 94 individual spectra (AB Aur). The stars cover the spectral type range B0 to M3. This atlas includes most, if not all PMS stars that were observed by IUE in the far-UV (1175 - 2000 AA). Our objective is to obtain the highest quality spectra of these stars and to extract time-averaged fluxes for the broad range of emission features produced in the atmospheres, disks, and winds of different kinds of PMS stars. These spectral features consist of emission lines formed at temperatures as high as 150,000 K (N 5), molecular features (H_2), and absorption lines formed in the hotter stars. We tabulate line and continuum fluxes and compare these UV properties with stellar, accretion, and wind properties. |
|
|
|
|
|
