EDP Sciences logo
Subscriber Authentication Point
Search
Menu
Home All issues Volume 528 (April 2011) A&A, 528 (2011) A3 Full HTML
Free Access

Table 6

Extinction towards each FEL/MHEL region. Line intensities/ratios are measured in a 0.5″  ×   0.5″ aperture centred on each source.

Source C–Ca H i ratiob [Fe ii] ratioc [Fe ii] ratioc [Fe ii] ratioc H2 ratiod H2 excitatione Publishedf
Diag 1.818/2.166 1.600/1.712 1.664/1.745 1.644/1.810 2.122/2.424 diagram values
Av (mag) Av (mag) Av (mag) Av (mag) Av (mag) Av (mag) Av (mag) Av (mag)
HH 34-IRS 4  ±  1 6.3  ±  1 36  ±  8 16  ±  1 39  ±  2 35  ±  5 0–6  > 7.11, 452, 412–323
HH 300-IRS 22  ±  1 39  ±  4 –ve ... 61  ±  16 –ve 0–27 ...
SVS 13 10  ±  1 9.7  ±  1  > 128 ...  < 47  < 80 ... 6–153
HH 72-IRS 10  ±  4 4.0  ±  1 51  ±  4 23  ±  2 42  ±  3 ... 0 4.74
HH 999-IRS 22  ±  3 8.2  ±  1 62  ±  21 ... ... ... ... ...
HH 26-IRS 14  ±  2 ...  > 80 ...  < 54 38  ±  6 17–27 372
HH 83-IRS 15  ±  2 ... ... ... ... ... ... ...

Notes. 

(a)

Av estimates derived by de-reddening J − H, H − Ks colours of each source in a near-IR colour–colour diagram (Fig. 10).

(b)

Extinction towards the H i recombination region at the base of each outflow, assuming case B recombination theory for ne = 109 cm-3, Te = 2000 K (Hummer & Storey 1987): Av =  −69.44 × log (1.25 ×  [I(9 − 4)/IBrγ] ).

(c)

Extinction towards the FEL region at the jet base. Values are calculated from three pairs of lines: Av =  −132 × log (0.262 ×  [I1.600/I1.712]), Av =  −208 × log (0.499 ×  [I1.664/I1.745]), and Av =  −104 × log (0.201 ×  [I1.644/I1.810]).

(d)

Extinction towards the H2 emission line (MHEL) region associated with each jet, derived from the ratio of the 1–0 S(1) and 1–0 Q(3) lines: Av =  −114 × log (0.704 ×  [IS1/IQ3] ).

(e)

Range of extinction values towards the MHEL region, derived by minimising the scatter of data points in H2 excitation diagrams; see Appendix C for details.

(f)

Extinction estimates taken from the literature; the superscript refers to the following publications: 1. Podio et al. (2006); 2. Antoniucci et al. (2008); 3. Takami et al. (2006); 4. Giannini et al. (2004) (measured only in the extended molecular outflow).

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.