- The Brick / Lima Bean
- deep extinction feature
- Tdust 20K
- MALT90 gas gives different T than dust
+ HNCO usually traces 70K gas at n~10^6
+ 0.3 pc resolution
- ALMA 13pt mosaic
- 1.7", dv=3.5 km/s, 20 microJy/bm
- column pdf is fairly lognormal
+ tiny excess on the tail
+ tail is only location of active SF
- lognormal is predicted...
- will form stars (already forming some)
- Gallery of data
- rgb slice movies
- cold absorption filaments
+ huge aspect ratio & line width
+ only seen in HCO+
+ approximately perpendicular to polarization
Questions
- Q Mitch: Any qualtitative feel for the bulk velocity field? Rotation, shear, compression?
- A: Probably shear.
- Q: Estimate mach number of shocks?
- A: yes can but haven't yet.
- A Steve: M~70
- Q: Column to volume densities. What range?
- A: 10^6 cm^-3 from the dust, up to 10^7
- A: Only one transition of each molecule, haven't done local density estimates
- Q Lang: Is the absorption filament a continuum feature?
- A: Doesn't line up with anything in particular.
- A Betsy: There's a parallel filament.
- Q Farhad: What is happening at the one site of SF?
- A: 80 blobs throughout the cloud, sizes ~0.3 pc, masses 10-100 msun. 1
water maser with 85 msun. No YSO correspondence