Reduced χ2 vs. continuum redshift

Reduced χ2 vs. continuum redshift (number of degrees of freedom Ndof = 319), when leaving redshift as a free parameter in the SPS model (Bruzual & Charlot 2003) fitting. The other parameters, including metallicity are allowed to vary. The rest-frame UV-NIR broadband photometry is not included in the fit. The 68% and 95% confidence intervals are indicated by the dotted lines. The best-fit emission line redshift is indicated by the vertical solid line, and its 68% and 95% confidence intervals by the green and blue shaded regions, respectively. The continuum emission yields a well constrained spectroscopic redshift. The redshift difference between the stellar and nebular emission is not at all significant.

Credit:

International Gemini Observatory/NOIRLab/NSF/AURA

About the Image

Id:geminiann09012b
Type:Chart
Release date:June 8, 2009, 7:15 p.m.
Related announcements:geminiann09012
Size:500 x 500 px

About the Object

Category:Illustrations

Image Formats

Large JPEG
85.1 KB
Screensize JPEG
192.4 KB

Zoomable


Wallpapers

1024x768
189.7 KB
1280x1024
269.2 KB
1600x1200
342.8 KB
1920x1200
374.6 KB
2048x1536
479.3 KB