Very Large Array Observations of Proper Motions in L1551 IRS 5

Details Very Large Array Observations of Proper Motions in L1551 IRS 5 Very Large Array Observations of Proper Motions in L1551 IRS 5

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apj...583..330r&link_type=abstract

The Astrophysical Journal, Volume 583, Issue 1, pp. 330-333.

Astronomy and Astrophysics

Astronomy

26

Astrometry, Ism: Jets And Outflows, Stars: Individual (L1551 Irs 5)

Scientific paper

Using high angular resolution (~0.1") Very Large Array observations made at 2 cm during the period 1983 to 1998, we report the detection of proper motions in the components of the binary radio source in L1551 IRS 5. The absolute proper motions observed in these two protostars, of order 25 mas yr-1 or ~17 km s-1 at a distance of 140 pc, are very similar in magnitude and direction to those of T Tauri stars in the same region and are attributed to the large-scale motion of the parent molecular complex. The relative astrometry between the two components reveals orbital proper motions that suggest that the total mass and period of the binary system are ~1.2 Msolar and ~260 yr, respectively.

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