Herx1 lc

Författare/Upphovsman:

HEASARC Director: Dr. Alan P. Smale HEASARC Associate Director: Dr. Roger Brissenden Responsible NASA Official: Phil Newman Web Curator: Meredith Gibb

Kreditera:

NASA's HEASARC: Observatories, Goddard Spaceflight Center, Uhuru observations of Hercules X-1

Kort länk:

https://sewiki.info/b/ad01b

Källa:

Wikimedia Commons

Upplösning:

445 x 189 Pixel (13673 Bytes)

Beskrivning:

This light curve of Her X-1 shows long term and medium term variability. Each pair of vertical lines deliniate the eclipse of the compact object behind its companion star. In this case, the companion is a 2 Solar-mass star with a radius of nearly 4 times that of our Sun. This eclipse shows us the orbital period of the system, 1.7 days.

The long term variability shown here is precession of a disk of accreting matter around the neutron star. This precession has a 35-day period.

In addition, the neutron star in Her X-1 is also a pulsar with a 1.24 second pulse period.

Licens:

Public domain

Licenskommentaren:

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