First Direct Measurement of Acceleration in the Outflow of a Nova: U Scorpii (1999)

Details First Direct Measurement of Acceleration in the Outflow of a Nova: U Scorpii (1999) First Direct Measurement of Acceleration in the Outflow of a Nova: U Scorpii (1999)

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...522l.121l&link_type=abstract

The Astrophysical Journal, Volume 522, Issue 2, pp. L121-L124.

Astronomy and Astrophysics

Astronomy

17

Stars: Novae, Cataclysmic Variables, Stars: Individual: Constellation Name: U Scorpii

Scientific paper

We report the first direct measurement of acceleration in the outflow of a nova, U Sco, observed 5 days after the start of an outburst. Spectroscopic time series of the intense Hα emission line, obtained with the Space Telescope Imaging Spectrograph camera on board the Hubble Space Telescope, shows a bright emission component moving across the spectrum at a rate of +0.16+/-0.02 Å in 30 minutes. This is consistent with a clump of emitting material having a line-of-sight acceleration a_r=+4.1+/-0.5 m s^-2. The data suggest that this clump resides within a moderately collimated bipolar outflow. Due to projection effects, this implies an actual acceleration of the clump relative to the star of a>~+25 m s^-2.

Affiliated with

Also associated with

No associations

Rating

First Direct Measurement of Acceleration in the Outflow of a Nova: U Scorpii (1999) 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 First Direct Measurement of Acceleration in the Outflow of a Nova: U Scorpii (1999), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First Direct Measurement of Acceleration in the Outflow of a Nova: U Scorpii (1999) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1769267