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Outflows and disks in post-RGB objects — products of common envelope ejection?

Published online by Cambridge University Press:  30 November 2022

Geetanjali Sarkar Open the ORCID record for Geetanjali Sarkar [Opens in a new window]  and
Raghvendra Sahai
Geetanjali Sarkar
Affiliation:
Department of Physics, Indian Institute of Technology, Kanpur U.P., India email: [email protected]
Raghvendra Sahai
Affiliation:
Jet Propulsion Laboratory Pasadena, CA, USA
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Abstract

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Interacting binaries within a common envelope, wherein the primary is a red giant are believed to result in a recently identified evolutionary class – the dusty post-RGB stars. Our SED modeling of eight post-RGBs in the LMC indicates the presence of geometrically thick disks with substantial opening angle in addition to the outer shells. We estimated the total dust mass (and gas mass assuming gas-to-dust ratio) in the disks and shells and set constraints on the dust grain compositions and sizes. The only known Galactic object of this class is the Boomerang nebula. Additionally, we present a DUSTY model of the Boomerang that can serve as a template for 2D modeling of the object using RADMC-3D. 2D modeling is essential to dissect the morphology of the spatially-unresolved post-RGBs in the LMC. These models may then be tested with future HST and ALMA imaging, together with JWST spectroscopy of these objects.

Keywords

(stars:) circumstellar matter(stars:) binaries (including multiple): closestars: evolutionstars: AGB and post-AGB
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 16 , Symposium S366: The Origin of Outflows in Evolved Stars , November 2020 , pp. 314 - 320
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Copyright
© The Author(s), 2022. Published by Cambridge University Press on behalf of International Astronomical Union

References

Bujarrabal, V., Alcolea, J., Sahai, R., Zamorano, J. & Zijlstra, A. A. 1998, A&A, 331, 361 Google Scholar
Clayton, M., Podsiadlowski, P., Ivanova, N., Justham, S. 2017, MNRAS, 470, 1788 CrossRefGoogle Scholar
Dullemond, C. P., Juhasz, A., Pohl, A., et al. 2012, RADMC-3D: A multi-purpose radiative transfer tool, Astrophysics Source Code Library. http://ascl.net/1202.015 Google Scholar
García-Lario, P., Riera, A. & Manchado, A. 1999, ApJ, 526, 854 CrossRefGoogle Scholar
Glanz, H. & Perets, H.B. 2018, MNRAS, 478, L12 CrossRefGoogle Scholar
Hrivnak, B. J., Smith, N., Su, K. Y. L. & Sahai, R. 2008, ApJ, 688, 327 CrossRefGoogle Scholar
Iaconi, R., Maeda, K., Nozawa, T., De Marco, O., Reichardt, T., 2020, MNRAS, 497, 3 CrossRefGoogle Scholar
Ivanova, N., Podsiadlowski, P., Spruit, H. 2002, MNRAS, 334, 819 CrossRefGoogle Scholar
Ivanova, N., Justham, S., Chen, X., et al. 2013, The Astronomy and Astrophysics Review, 21, 59 CrossRefGoogle Scholar
Ivezić, Z., Nenkova, M., Heymann, F. & Elitzur, M. 2012, User Manual for DUSTY (V4)Google Scholar
Kamath, D., Wood, P. R. & Van Winckel, H. 2014, MNRAS, 439, 2211 CrossRefGoogle Scholar
Kamath, D., Wood, P. R. & Van Winckel, H. 2015, MNRAS, 454, 1468 CrossRefGoogle Scholar
Kamath, D., Wood, P. R., Van Winckel, H., & Nie, J.D. 2016, A&A (Letters), 586, L5 Google Scholar
Kashi, Amit & Soker, Noam 2011, MNRAS, 417, 1466 CrossRefGoogle Scholar
Keller, S. C. & Wood, P. R. 2006, ApJ, 642, 834 CrossRefGoogle Scholar
Kwok, S., Su, K. Y. L. & Hrivnak, B. J. 1998, ApJ (Letters), 501, L117 CrossRefGoogle Scholar
Kwok, S., Hrivnak, B. J., & Su, K. Y. L. 2000, ApJ (Letters), 544, L149 CrossRefGoogle Scholar
Lü, G., Zhu, C. & Podsiadlowski, P. 2013, ApJ, 768, 193 CrossRefGoogle Scholar
Mathis, J. S., Rumpl, W. & Nordsieck, K. H. 1977, ApJ, 217, 425 CrossRefGoogle Scholar
Paczynski, B. 1976, in IAU Symposium 73, Structure and Evolution of Close Binary Systems, eds. Eggleton, P., Mitton, S., Whelan, J., p. 75CrossRefGoogle Scholar
Phillips, J. P., Ramos-Larios, G. 2010, MNRAS, 405, 2179 Google Scholar
Podsiadlowski, P., Ivanova, N., Justham, S., Rappaport, S. 2010, MNRAS, 406, 840 Google Scholar
Sahai, R. & Nyman, Lars-Ake 1997 ApJ, 487, L155 CrossRefGoogle Scholar
Sahai, R., et al. 1998, ApJ, 493, 301 CrossRefGoogle Scholar
Sahai, R. & Trauger, J. T. 1998, AJ, 116, 1357 CrossRefGoogle Scholar
Sahai, R., Morris, M. R. & Villar, G. G. 2011, AJ, 141, 134 CrossRefGoogle Scholar
Sahai, R., Vlemmings, W.H.T. & Nyman, L.A. 2017, ApJ, 841, 110 CrossRefGoogle Scholar
Sarkar, G. & Sahai, R. 2006, ApJ, 644, 1171 CrossRefGoogle Scholar
Wegner, G. & Glass, I. S. 1979, MNRAS, 188, 327 CrossRefGoogle Scholar