Artículo
Ortiz, J.L.; Sugerman, B.E.K.; De La Cueva, I.; Santos-Sanz, P.; Duffard, R.; Gil-Hutton, R.; Melita, M.; Morales, N. "Observation of light echoes around very young stars" (2010) Astronomy and Astrophysics. 519(4)
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Abstract:
Aims. The goal of the paper is to present new results on light echoes from young stellar objects. Methods. Broad band CCD images were obtained over three months at one-to-two week intervals for the field of NGC 6726, using the large field-of-view remotely-operated telescope on top of Cerro Burek. Results. We detected scattered light echoes around two young, low-amplitude, irregular variable stars. Observations revealed not just one, but multiple light echoes from brightness pulses of the T Tauri star S CrA and the Herbig Ae/Be star R CrA. Analysis of S CrA's recurring echoes suggests that the star is located 138 ± 16 pc from Earth, making these the closest echoes ever detected. The environment that scatters the stellar light from S CrA is compatible with an incomplete dust shell or an inclined torus some 10 000 AU in radius and containing ∼2 × 10-3 M ⊙of dust. The cause of such concentration at ∼10 000 AU from the star is unknown. It could be the remnant of the envelope from which the star formed, but the distance of the cloud is remarkably similar to the nominal distance of the Oort cloud to the Sun, leading us to also speculate that the dust (or ice) seen around S CrA might have the same origin as the Solar System Oort cloud. © 2010 ESO.
Registro:
| Documento: | Artículo |
| Título: | Observation of light echoes around very young stars |
| Autor: | Ortiz, J.L.; Sugerman, B.E.K.; De La Cueva, I.; Santos-Sanz, P.; Duffard, R.; Gil-Hutton, R.; Melita, M.; Morales, N. |
| Filiación: | Instituto de Astrofísica de Andalucía, CSIC, Apt 3004, 18080 Granada, Spain Department of Physics and Astronomy, Goucher College, 1021 Dulaney Valley Rd., Baltimore, MD 21204, United States Astroimagen. C. Abad y Lasierra, 58 Bis - 62, 07800 Ibiza, Islas Baleares, Spain Observatoire de Paris, LESIA-UMR CNRS 8109, 5 place Jules Janssen, 92195 Meudon Cedex, France Complejo Astronómico El Leoncito, CASLEO-CONICET, San Juan National University, Avda. de España 1512 sur, J5402DSP, San Juan, Argentina Instituto de Astronomía y Física Del Espacio, Universidad de Buenos Aires, CONICET, CC 67-Suc 28, C1428ZAA, Ciudad Autónoma de Buenos Aires, Argentina |
| Palabras clave: | Herbig Ae/Be; Stars: imaging; Stars: protostars; Stars: variables: T Tauri; Broad bands; CCD images; Herbig Ae/Be; Large field of views; Light echoes; Low-amplitude; New results; Oort cloud; Scattered light; Stars: imaging; Stars: protostars; Stars: variables: T Tauri; T Tauri stars; Variable stars; Young stars; Young stellar objects; Dust; Sun; Stars |
| Año: | 2010 |
| Volumen: | 519 |
| Número: | 4 |
| DOI: | http://dx.doi.org/10.1051/0004-6361/201014438 |
| Título revista: | Astronomy and Astrophysics |
| Título revista abreviado: | Astron. Astrophys. |
| ISSN: | 00046361 |
| CODEN: | AAEJA |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v519_n4_p_Ortiz |
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Citas:
---------- APA ----------
Ortiz, J.L., Sugerman, B.E.K., De La Cueva, I., Santos-Sanz, P., Duffard, R., Gil-Hutton, R., Melita, M.,..., Morales, N. (2010) . Observation of light echoes around very young stars. Astronomy and Astrophysics, 519(4).http://dx.doi.org/10.1051/0004-6361/201014438
---------- CHICAGO ----------
Ortiz, J.L., Sugerman, B.E.K., De La Cueva, I., Santos-Sanz, P., Duffard, R., Gil-Hutton, R., et al. "Observation of light echoes around very young stars" . Astronomy and Astrophysics 519, no. 4 (2010).http://dx.doi.org/10.1051/0004-6361/201014438
---------- MLA ----------
Ortiz, J.L., Sugerman, B.E.K., De La Cueva, I., Santos-Sanz, P., Duffard, R., Gil-Hutton, R., et al. "Observation of light echoes around very young stars" . Astronomy and Astrophysics, vol. 519, no. 4, 2010.http://dx.doi.org/10.1051/0004-6361/201014438
---------- VANCOUVER ----------
Ortiz, J.L., Sugerman, B.E.K., De La Cueva, I., Santos-Sanz, P., Duffard, R., Gil-Hutton, R., et al. Observation of light echoes around very young stars. Astron. Astrophys. 2010;519(4).http://dx.doi.org/10.1051/0004-6361/201014438
