Table 1
IRAS 4A: envelope continuum emission at 880 μm and derived parametersa.
| α(J2000)b | 3h29m10.520s |
| δ(J2000)b |
|
| Tdustc | 50 K |
|
|
|
| rmsI | 20 mJy beam-1 |
| rmsQ | 2.5 mJy beam-1 |
| rmsU | 2.5 mJy beam-1 |
|
|
|
|
4.1 ± 0.4 Jy |
|
1.03 ± 0.02 Jy beam-1 |
| FWHMd | 1156 AU ( ) |
|
|
|
|
160 ± 16 mJy |
|
38.2 ± 2.5 mJy beam-1 |
| Ωpole | 14 arcsec2 |
|
|
|
| τ | 0.07 |
| NH2f | 1.2 × 1024 cm-2 |
| nH2f | 1.1 × 108 cm-3 |
| Massf | 0.8 M⊙ |
Notes.
See Appendix A of Frau et al. (2010) for details.
Diameter of the circle with the same area as the region of the source with intensity above half of the peak.
Assuming κ250 GHz = 1.5 cm2 g-1 and a gas-to-dust ratio of 100 (Girart et al. 2006).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.