The velocity curve of star from GRS 1915+105 binary system

The image displays the velocity of the donor star, as determined from the Doppler shifts of the carbon monoxide lines (ESO Press Photo eso0135). It shows velocities from sixteen observations taken with VLT ANTU/ISAAC between April and September 2000. A periodogram analysis (upper panel) determines the period as 33.5 days and an orbit with this period represents the best fit to the data (lower panel). The orbital velocity of the binary star moving around the black hole is about 140 km/s.



About the Image

Release date:28 November 2001
Related releases:eso0135
Size:751 x 604 px

About the Object

Name:GRS 1915+105
Type:• Milky Way : Star : Type : Exotic : X-Ray Binary
Distance:40000 light years

Image Formats

Large JPEG
70.5 KB
Screensize JPEG
94.4 KB

Colours & filters

InfraredVery Large Telescope


Also see our