Proper Motions of Thermal Radio Sources near HH 7-11 in the NGC 1333 Star Forming Region

Abstract

Star forming regions are expected to show linear proper motions due to the relative motion of the Sun with respect to the region. These proper motions appear superposed to the proper motions expected in features associated with mass ejection from the young stellar objects embedded in them. Therefore, it is necessary to have a good knowledge of the proper motions of the region as a whole in order to correctly interpret the motions associated with mass ejection. In this paper we present the first direct measurement of proper motions of the NGC 1333 star forming region. This region harbors one of the most studied Herbig-Haro systems, HH 7-11, whose exciting source remains unclear. Using VLA A configuration data at 3.6 cm taken over 10 years, we have been able to measure the absolute proper motions of four thermal sources embedded in NGC 1333. From our results we have derived the mean proper motions of the NGC 1333 star forming region to be mu(alpha)cos(delta) = 9 +- 1 mas/yr and mu(delta) = -10 +- 2 mas/yr. In this paper, we also discuss the possible implications of our results in the identification of the outflow exciting sources.

arXiv commentAccepted by The Astronomical Journal (30 August 2008)

References in corpus (8)

• Local stellar kinematics from Hipparcos data
• Unveiling the Circumstellar Envelope and Disk: A Sub-Arcsecond Survey of Circumstellar Structures
• Astrometry of Water Maser Sources in Nearby Molecular Clouds with VERA - II. SVS 13 in NGC 1333
• VLBA determination of the distance to nearby star-forming regions I. The distance to T Tauri with 0.4% accuracy
• Proper Motions of the BN Object and the I Radio Source in Orion: Where and When Did BN Become a Runaway Star?
• Dynamical decay of a massive multiple system in Orion KL?
• Ejection of a Low Mass Star in a Young Stellar System in Taurus
• A Single Circumstellar Disk in the SVS 13 Close Binary System

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• CALYPSO view of SVS 13A with PdBI: Multiple jet sources
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• The Physical Properties of the SVS 13 Protobinary System: Two Circumstellar Disks and a Spiraling Circumbinary Disk in the Making
• The VLA Nascent Disk And Multiplicity Survey of Perseus Protostars (VANDAM). III. Extended Radio Emission from Protostars in Perseus
• The Gould's Belt Very Large Array Survey V: The Perseus Region
• Streamers feeding the SVS13-A protobinary system: astrochemistry reveals accretion shocks?