“School of Astronomy”
Back to Papers HomeBack to Papers of School of Astronomy
| Paper IPM / Astronomy / 13906 |
|
||||||||||||||||||||||||
| Abstract: | |||||||||||||||||||||||||
|
We present a new high signal to noise ratio spectroscopic survey of the Northern hemisphere to probe the Local Bubble and its surroundings using the Ã
and Ã
Diffuse Interstellar Bands (DIBs). We observed 432 sightlines to a distance of 200 pc over a duration of 3 years. In this study, we establish the and correlations with Na I, Ca II and E(B-V), for both inside and outside the Local Bubble. The correlations show that among all neutral and ionized atoms, the correlation between Ca II and is stronger than its correlation with , suggesting that is more associated with regions where Ca is more abundant. We study the correlation with , which shows a tight correlation within and outside the Local Bubble. In addition we investigate the DIB properties in UV irradiated and UV shielded regions. We find that, within and beyond the Local Bubble, is located in denser parts of clouds, protected from UV irradiation, while is located in the low density regions of clouds.
Download TeX format |
|||||||||||||||||||||||||
| back to top | |||||||||||||||||||||||||
