H2-12, a misidentified planetary nebula in Kepler SNR

 

H. Riesgo and J. A. López

 

Instituto de Astronomía, UNAM, Apdo. Postal 877, 22800 Ensenada, B. C., México (hriesgo@astrosen.unam.mx, jal@astrosen.unam.mx).

 

Received, 2004 November 18
Accepted 2004 December 6

 

RESUMEN

Presentamos imágenes de banda angosta y espectros echelle de rendija larga de H 2-12. Esta nebulosa ha sido clasificada como una nebulosa planetaria. Sin embargo, los datos presentados aquí muestran que este objeto es en realidad parte de los nudos y filamentos más brillantes localizados en la parte occidental de la remanente de supernova de Kepler. Por lo tanto, la clasificación de H 2-12 como una nebulosa planetaria debe ser considerada como errónea.

 

ABSTRACT

Narrow-band direct images and long-slit, echelle spectra are presented for H 2-12. This nebula has been classified as a true planetary nebula. However, the data presented here shows that this object is actually part of the brightest knots and filaments located on the western side of Kepler's supernova remnant. Therefore, H 2-12 must be noted as a misclassified planetary nebula.

Key Words: Hydrodynamics — ISM: Individual (H 2-12) — ISM: Jets and outflows — ISM: Planetary nebulae — ISM: Supernova remnants.

 

DESCARGAR ARTÍCULO EN FORMATO PDF

 

ACKNOWLEDGMENTS

HR acknowledges a posgraduate scholarship from CONACYT. JAL acknowledges continuous support from DGAPA-UNAM and CONACYT through grants IN112103 and 32214-E, respectively.

 

REFERENCES

Acker, A., Chopinet, M., Pottasch, S. R., & Stenholm, B. 1987, A&A SS, 71, 163         [ Links ]

Acker, A., Ochsenbein, F., Stenholm, B., Tylenda, R., Marcout, J., & Schohn, C. 1992, Strasbourg-ESO Catalogue of Galactic Planetary Nebulae, ESO         [ Links ]

Blair, W. P., Long, K. S., & Vancura, O. 1991, ApJ, 366, 484        [ Links ]

Bond, H. E. 1976, PASP, 88, 192        [ Links ]

Guerrero, M. A., Vázquez, R., & López, J. A. 1999, AJ, 117, 967        [ Links ]

Haro, G. 1952, Bol. Obs. Tonantzintla y Tacubaya, 1, No. 8, 3        [ Links ]

Kohoutek, L. 1978, in IAU Symp. 76, Planetary Nebulae, ed. Y Terzian (Dordrecht: Reidel), 47        [ Links ]

----------. 1994, Astron. Nachr., 315, No. 1, 63        [ Links ]

----------. 1997, Astron. Nachr., 318, No. 1, 35        [ Links ]

López, J. A. 2000, in RevMexAA(SC) 9, Astrophysical Plasmas: Codes, Models, and Observations, eds. S. J. Arthur, N. Brickhouse, & J. Franco (México City: Inst. Astron., UNAM), 201         [ Links ]

López, J. A. 2002, in RevMexAA(SC) 13, Emission Lines from Jets Flows, eds. W. J. Henney, W. Steffen, L. Binette, & A. Raga (México City: Inst. Astron., UNAM), 139        [ Links ]

López, J. A., Meaburn, J., Bryce, M., & Rodríguez, L. F. 1997, ApJ, 475, 705        [ Links ]

Meaburn, J., Blundell, B., Carling, R., Gregory, D. F., Keir, D., & Wynne, C. G. 1984, MNRAS, 210, 463         [ Links ]

Meaburn, J., & López, J. A. 1996, ApJ, 472, L45        [ Links ]

Meaburn, J., López, J. A., Bryce, M., & Redman, M. P. 1998, A&A, 334, 670        [ Links ]

Meaburn, J., López, J. A., Gutiérrez, L., Quiroz, F., Murillo, J. M., Valdéz, J., & Pedrayez, M. 2003, RevMexAA, 39, 185        [ Links ]

Perek, L., & Kohoutek, L. 1967, Catalogue of Galactic Planetary Nebulae (Prague: Publishing House of Czechoslovak Academy of Sciences)        [ Links ]

Riesgo-Tirado, H., & López, J. A. 2002, in RevMexAA(SC) 12, Ionized Gaseous Nebulae: A Conference to Celebrate the 60th Birthdays of Silvia Torres-Peimbert and Manuel Peimbert, eds. W. J. Henney, J. Franco, M. Martos, & M. Peña (México City: Inst. Astron., UNAM), 174         [ Links ]

Van den Bergh, S., & Pritchet, C. 1991, PASP, 103, 194        [ Links ]