NN Ser Spectrum during Total Eclipse

This chart represents the spectrum of the cool dwarf star in the variable stellar system NN Ser . The 5 min exposure was obtained during the total phase of the eclipse, when the magnitude of the system was V = 23.0. Several TiO bands are clearly visible in this slightly smoothed tracing. A few deep and narrow "absorption" features are residuals from sky subtraction. The original resolution is 0.55 nm/pix. A spectral type of M6 or later is deduced for NN Ser . The spectrum of a more nearby (and hence much brighter) M6.5 dwarf star (temperature approx. 2600 degrees) is shown below for comparison.

Credit:

ESO

About the Image

Id:eso9936d
Type:Observation
Release date:20 July 1999
Related releases:eso9936
Size:960 x 723 px

About the Object

Name:NN Serpentis, Spectrum
Type:• Milky Way : Star : Grouping : Binary
• X - Stars
Distance:1500 light years

Image Formats

JPEG grande
99.6 KB
Screensize JPEG
102.4 KB

Wallpapers

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Colours & filters

BandTelescope
OpticalVery Large Telescope
FORS1
Infrared
Near-IR
Very Large Telescope
FORS1

 

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