Por favor, use este identificador para citar o enlazar este ítem:
http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1878| New Panoramic View of ¹²CO and 1.1 mm Continuum Emission in the Orion A Molecular Cloud. I. Survey Overview and Possible External Triggers of Star Formation | |
| David Hughes | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| Stars: formation ISM: molecules ISM: cloud | |
| We present new, wide and deep images in the 1.1 mm continuum and the ¹²CO (J=1–0) emission toward the northern part of the Orion A Giant Molecular Cloud (Orion-A GMC). The 1.1 mm data were taken with the AzTEC camera mounted on the Atacama Submillimeter Telescope Experiment (ASTE) 10 m telescope in Chile, and the ¹²CO (J=1–0) data were with the 25 beam receiver (BEARS) on the NRO 45 m telescope in the On-The-Fly (OTF) mode. The present AzTEC observations are the widest (1.◦7 × 2.◦3, corresponding to 12 pc × 17 pc) and the highest-sensitivity (∼9 mJy beam⁻¹) 1.1 mm dust-continuum imaging of the Orion-A GMC with an effective spatial resolution of ∼ 40′′. The ¹²CO (J=1–0) image was taken over the northern 1.◦2 × 1.◦2 (corresponding 9 pc × 9 pc) area with a sensitivity of 0.93 K in T🇲🇧, a velocity resolution of 1.0 km s⁻¹, and an effective spatial resolution of 21′′. With these data, together with the MSX 8 μm, Spitzer 24 μm and the 2MASS data, we have investigated the detailed structure and kinematics of molecular gas associated with the Orion-A GMC and have found evidence for interactions between molecular clouds and the external forces that may trigger star formation. Two types of possible triggers were revealed; 1) Collision of the diffuse gas on the cloud surface, particularly at the eastern side of the OMC-2/3 region, and 2) Irradiation of UV on the pre-existing filaments and dense molecular cloud cores. Our wide-field and high-sensitivity imaging have provided the first comprehensive view of the potential sites of triggered star formation in the Orion-A GMC. | |
| Publications- Astronomical Society of Japan | |
| 2011-02 | |
| Artículo | |
| Inglés | |
| Estudiantes Investigadores Público en general | |
| Shimajiri, Yoshito., et al., (2011), New Panoramic View of ¹²CO and 1.1 mm Continuum Emission in the Orion A Molecular Cloud. I. Survey Overview and Possible External Triggers of Star Formation, Publications- Astronomical Society of Japan Vol.63(1):1 - 32 | |
| ASTRONOMÍA Y ASTROFÍSICA | |
| Versión aceptada | |
| acceptedVersion - Versión aceptada | |
| Aparece en las colecciones: | Artículos de Astrofísica |
Cargar archivos:
| Fichero | Tamaño | Formato | |
|---|---|---|---|
| 48 Shimajiri_2011_PASJ63.pdf | 862.97 kB | Adobe PDF | Visualizar/Abrir |