EDP Sciences logo
Subscriber Authentication Point
Search
Menu
Home All issues Volume 554 (June 2013) A&A, 554 (2013) A78 Full HTML
Free Access

Table 3

Acetone line parameters toward selected positions.

Position RA Dec VLSRa ΔVb Trotd Ntotd Notec
(05h35m) (−05°22′) (km s-1) (km s-1) (K) (cm-2)
Ace-1 7.47 ± 1.07 3.49 ± 1.09 158.7 ± 13.1 3.4 ± 0.1 × 1016 1.4 ± 0.4 × 10-8 dM-1, MF-2, CS-3
Ace-2 7.58 ± 1.27 4.46 ± 1.30 145.4 ± 16.2 2.1 ± 0.1 × 1016 5.5 ± 4.0 × 10-8 CS-5, IRc7
Ace-3 6.70 ± 1.95 4.20 ± 1.94 ~100 6.3 ± 1.9 × 1015 4.8 ± 1.8 × 10-9 MF-5, CS-6, IRc6, KL-W
HC 6.87 ± 1.29 4.92 ± 1.37 141.0 ± 20.9 1.2 ± 0.2 × 1016 2.1 ± 0.4 × 10-9 CS-1

Notes.Positions are given at the epoch J2000.0. Acetone column densities and fractional abundances were estimated in source sizes of 2′′ for Ace-1, Ace-2, and HC, and 17 for Ace-3.

(a)

Mean LSR velocities measured at peak temperatures.

(b)

Mean FWHM line widths.

(c)

Counterparts as observed in the deuterated methanol (dM, Peng et al. 2012), methyl formate (MF, Favre et al. 2011a), CS J = 1 − 0 (Chandler & Wood 1997), and infrared (Shuping et al. 2004; Gezari et al. 1998) emission. Note that IRc7 is offset ~1″ to the southwest from Ace-2, and IRc6 is extended.

(d)

The acetone rotational temperatures Trot, column densities Ntot, and fractional abundances (Xace = [(CH3)2CO]/[H2]) were estimated with source sizes of 2 arcsec.

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.