A one–sided knot ejection at the core of the HH 111 outflow
L. Gómez,1,2,3 L. F. Rodríguez,4,5 and L. Loinard1,4
1 Max–Planck–Institut für Radioastronomie, Germany.
2 Departamento de Astronomía, Universidad de Chile, Camino El Observatorio 1515, Las Condes, Santiago, Chile. (lgomez@das.uchile.cl).
3 CSIRO Astronomy and Space Science, Australia.
4 Centro de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México, Apdo. Postal 3–72, 58090 Morelia, Michoacán, México. (l.loinard@crya.unam.mx, l.rodriguez@crya.unam.mx).
]]> 5 Astronomy Department, Faculty of Science, King Abdulaziz University, Saudi Arabia.
Received 2012 August 27.
Accepted 2012 December 07.
RESUMEN
Presentamos un estudio astrométrico de la radiofuente VLA 1 de la cual se origina el flujo HH 111 usando nuevos datos (2007) así como también observaciones de archivo (1992–1996). Todos los datos fueron tomados en 3.6 cm con el Very Large Array en su configuración más extendida (A). La fuente VLA 1 ha tenido un cambio dramático, mostrando una eyección monopolar en la época de 2007. También reportamos la detección de una fuente de continuo compacta (VLA 3) localizada a ( —10.'' 6, 98.''7) de VLA 1. No se encontraron movimientos propios significativos en VLA 1 ni en VLA 3 y los límites superiores son consistentes con los encontrados para radiofuentes (embebidas) en la Nebulosa de Orión. Favorecemos la interpretación de que en 3.6 cm estamos observando dos chorros casi perpendiculares. HH 111 representa un nuevo caso de eyecciones monopolares en un objeto joven estelar. No se pudo establecer si VLA 3 es galáctica (o extragaláctica).
ABSTRACT
We present an astrometry study of the radio source VLA 1 at the core of the HH 111 outflow using new data (2007) as well as archival observations (1992–1996). All data were taken at 3.6 cm with the Very Large Array in its most extended (A) configuration. The source VLA 1 has undergone a dramatic morphological change, showing a one–sided knot ejection in the 2007 epoch. We also report the detection of a 3.6 cm compact continuum source (VLA 3) located at ( —10.''6, 98.''7) from VLA 1. No significant absolute proper motions were found for VLA 1 and VLA 3 and the upper limits are consistent with those found for (embedded) radio sources in the Orion Nebula. We favor the interpretation that in the continuum at 3.6 cm we are observing two nearly perpendicular jets. HH 111 presents a new case of one–sided jet ejection in a young stellar object. The galactic (or extragalactic) nature of VLA 3 remains unclear.
]]> Key Words: astrometry — ISM: individual objects (HH 111) — ISM: jets and outflows — radio continuum: ISM.
DESCARGAR ARTÍCULO EN FORMATO PDF
REFERENCES
AMI Consortium, et al. 2012, MNRAS, 423, 1089 [ Links ]
Curiel, S., et al. 2006, ApJ, 638, 878 [ Links ]
Gómez, L., Rodríguez, L. F., Loinard, L., Lizano, S., Poveda, A., & Allen, C. 2005, ApJ, 635, 1166 [ Links ]
Gredel, R., & Reipurth, B. 1993, ApJ, 407, L29 [ Links ]
Hirth, G. A., Mundt, R., Solf, J., & Ray, T. P. 1994, ApJ, 427, L99 [ Links ]
Königl, A., & Pudritz, R. E. 2000, in Protostars and Planets IV, ed. V. Mannings, A. P. Boss & S. S. Russell (Tucson, AZ: Univ. Arizona Press), 759 [ Links ]
Lada, C. J., & Lada, E. A. 2003, ARA & A, 41, 57 [ Links ]
Lee, C.–F. 2011, ApJ, 741, 62 [ Links ]
Menten, K. M., Reid, M. J., Forbrich, J., & Brunthaler, A. 2007, A & A, 474, 515 [ Links ]
Mezger, P. G., & Henderson, A. P. 1967, ApJ, 147, 471 [ Links ]
Murakami, H., et al. 2007, PASJ, 59, 369 [ Links ]
Noriega–Crespo, A., Raga, A., Lora, V., Stapelfeldt, K. R., & Carey, S. J. 2011, ApJ, 732, L16 [ Links ]
Pech, G., et al. 2010, ApJ, 712, 1403 [ Links ]
Pudritz, R. E., Ouyed, R., Fendt, C., & Brandenburg, A. 2007, in Protostars and Planets V, ed. B. Reipurth, D. Jewitt, & K. Keil (Tucson, AZ: Univ. Arizona Press), 277 [ Links ]
Reipurth, B. 1989, Nature, 340, 42 [ Links ]
Reipurth, B., Raga, A. C., & Heathcote, S. 1992, ApJ, 392, 145 [ Links ]
Reipurth, B., Yu, K. C., Rodríguez, L. F., Heathcote, S., & Bally, J. 1999, A & A, 352, L83 [ Links ]
Rodríguez, L. F., Dzib, S. A., Loinard, L., Zapata, L. A., Raga, A. C., Canto, J., & Riera, A. 2012a, RevMexAA, 48, 243 [ Links ]
Rodríguez, L. F., & Reipurth, B. 1994, A & A, 281, 882 [ Links ]
Rodríguez, L. F., Torrelles, J. M., Anglada, G., & Reipurth, B. 2008, AJ, 136, 1852 [ Links ]
Rodríguez, L. F., et al. 2012b, A & A, 537, A123 [ Links ]
Shu, F. H., Najita, J. R., Shang, H., & Li, Z.–Y. 2000, in Protostars and Planets IV, ed. V. Mannings, A. P. Boss, & S. S. Russell (Tucson, AZ: Univ. Arizona Press), 789 [ Links ]
Skrutskie, M. F., et al. 2006, AJ, 131, 1163 [ Links ]
Windhorst, R. A., Fomalont, E. B., Partridge, R. B., & Lowenthal, J. D. 1993, ApJ, 405, 498 [ Links ]
Wright, E. L., et al. 2010, AJ, 140, 1868 [ Links ] ]]>