The Multiple Pre-main-sequence System HBC 515 in L1622
Abstract
The bright pre-main-sequence star HBC 515 (HD 288313) located in the L1622 cometary cloud in Orion has been studied extensively with optical/infrared imaging and ultraviolet/optical/infrared spectroscopy. The spectra indicate that HBC 515 is a weakline T Tauri star (TTS) of spectral type K2V. Adaptive optics imaging in the K band reveals that HBC 515 is a binary with two equally bright components separated by 0farcs5. A very faint third component is found 5'' to the northwest. Spitzer IRAC and MIPS observations show that at mid-infrared wavelengths this third source dominates the system, suggesting that it is a protostar still embedded in the nascent cloud of HBC 515. The close association of a weakline TTS with a newborn protostar in a multiple system is noteworthy. Two nearby TTSs are likely associated with the HBC 515 multiple system, and the dynamical evolution of the complex that would lead to such a configuration is considered.
- Publication:
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The Astronomical Journal
- Pub Date:
- April 2010
- DOI:
- 10.1088/0004-6256/139/4/1668
- Bibcode:
- 2010AJ....139.1668R
- Keywords:
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- accretion;
- accretion disks;
- binaries: close;
- stars: formation;
- stars: individual: HBC 515;
- stars: pre-main sequence