Ultra-high-precision velocity measurements of oscillations in alpha Cen A

Details Ultra-high-precision velocity measurements of oscillations in alpha Cen A Ultra-high-precision velocity measurements of oscillations in alpha Cen A

2003-11-17

arxiv.org/abs/astro-ph/0311408v1

Astrophys.J.600:L75-L79,2003

Astronomy and Astrophysics

Astrophysics

ApJ Letters (accepted)

Scientific paper

10.1086/381434

We have made differential radial velocity measurements of the star alpha Cen A using two spectrographs, UVES and UCLES, both with iodine absorption cells for wavelength referencing. Stellar oscillations are clearly visible in the time series. After removing jumps and slow trends in the data, we show that the precision of the velocity measurements per minute of observing time is 0.42 m/s for UVES and 1.0 m/s for UCLES, while the noise level in the Fourier spectrum of the combined data is 1.9 cm/s. As such, these observations represent the most precise velocities ever measured on any star apart from the Sun.

Affiliated with

Also associated with

No associations

Rating

Ultra-high-precision velocity measurements of oscillations in alpha Cen A does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Ultra-high-precision velocity measurements of oscillations in alpha Cen A, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultra-high-precision velocity measurements of oscillations in alpha Cen A will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-339288