ZTF J1539+5027
(binary star of two white dwarfs with tight orbit)
ZTF J1539+5027 is an binary star consisting of two
white dwarfs. Its orbital period is just under
7 minutes and is measurably decreasing (orbital decay),
most of the decrease attributed to gravitational waves,
and analysis suggests LISA would detect them.
It is an eclipsing binary and a
double-line spectroscopic binary.
The hotter of the two has a temperature on the order
of 50,000 K.
The light curve shows not only the reductions due to
the eclipses, but a brightening of the less bright star when illuminated
by its companion, something like that of a transiting planet.
Characteristics:
- Boötes - constellation.
- 15h39m32.1588023113s - right ascension.
- +50deg27m38.782960414s - declination.
- 8000 ly - distance.
- 415 seconds - orbital period.
- 0.610 and 0.210 - solar masses.
- 0.01562 and 0.03140 - solar radii (the more massive star has the smaller radius, a characteristic of white dwarfs).
(star,binary star,white dwarf)
Further reading:
https://en.wikipedia.org/wiki/ZTF_J153932.16%2B502738.8
https://ui.adsabs.harvard.edu/abs/2019Natur.571..528B/abstract
https://ui.adsabs.harvard.edu/abs/2020ApJ...905...32B/abstract
https://www.caltech.edu/about/news/dead-stars-found-whipping-around-each-other-minutes
Redshift | Parsecs /Distance | Lightyears /Lookback Years | | |
~0 | 2kpc | 8.00kly | | ZTF J1539+5027 |
|
Coordinates: | ZTF J1539+5027 J153932.1588023113+502738.782960414 |
|
Index