AN INFRARED NEBULA ASSOCIATED WITH δ CEPHEI: EVIDENCE OF MASS LOSS?
We present the discovery of an infrared nebula around the Cepheid prototype δ Cephei and its hot companion HD 213307. Large-scale (~2.1 × 10[superscript 4] AU) nebulosity is detected at 5.8, 8.0, 24, and 70 μm. Surrounding the two stars, the 5.8 and 8.0 μm emission is largely attributable to polycyc...
| Main Authors: | , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
IOP Publishing
2015
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| Online Access: | http://hdl.handle.net/1721.1/95824 |
| _version_ | 1826209887755960320 |
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| author | Marengo, Massimo Evans, N. R. Barmby, P. Bono, G. Welch, D. L. Romaniello, M. Huelsman, D. Su, K. Y. L. Fazio, G. G. Matthews, Lynn D. |
| author2 | Haystack Observatory |
| author_facet | Haystack Observatory Marengo, Massimo Evans, N. R. Barmby, P. Bono, G. Welch, D. L. Romaniello, M. Huelsman, D. Su, K. Y. L. Fazio, G. G. Matthews, Lynn D. |
| author_sort | Marengo, Massimo |
| collection | MIT |
| description | We present the discovery of an infrared nebula around the Cepheid prototype δ Cephei and its hot companion HD 213307. Large-scale (~2.1 × 10[superscript 4] AU) nebulosity is detected at 5.8, 8.0, 24, and 70 μm. Surrounding the two stars, the 5.8 and 8.0 μm emission is largely attributable to polycyclic aromatic hydrocarbon emission swept from the interstellar medium by a wind originating from δ Cephei and/or its companion. Stochastically heated small dust grains are the most likely source of the 24 and 70 μm extended emission. The 70 μm emission, in particular, resembles a bow shock aligned in the direction of the proper motion of δ Cephei. This discovery supports the hypothesis that δ Cephei may be currently losing mass, at a rate in the range of ≈5 × 10[superscript -9] to 6 × 10[superscript -8] M[subscript ʘ] yr[superscript -1]. |
| first_indexed | 2024-09-23T14:34:05Z |
| format | Article |
| id | mit-1721.1/95824 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:34:05Z |
| publishDate | 2015 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/958242022-10-01T21:42:13Z AN INFRARED NEBULA ASSOCIATED WITH δ CEPHEI: EVIDENCE OF MASS LOSS? Marengo, Massimo Evans, N. R. Barmby, P. Bono, G. Welch, D. L. Romaniello, M. Huelsman, D. Su, K. Y. L. Fazio, G. G. Matthews, Lynn D. Haystack Observatory Matthews, Lynn D. We present the discovery of an infrared nebula around the Cepheid prototype δ Cephei and its hot companion HD 213307. Large-scale (~2.1 × 10[superscript 4] AU) nebulosity is detected at 5.8, 8.0, 24, and 70 μm. Surrounding the two stars, the 5.8 and 8.0 μm emission is largely attributable to polycyclic aromatic hydrocarbon emission swept from the interstellar medium by a wind originating from δ Cephei and/or its companion. Stochastically heated small dust grains are the most likely source of the 24 and 70 μm extended emission. The 70 μm emission, in particular, resembles a bow shock aligned in the direction of the proper motion of δ Cephei. This discovery supports the hypothesis that δ Cephei may be currently losing mass, at a rate in the range of ≈5 × 10[superscript -9] to 6 × 10[superscript -8] M[subscript ʘ] yr[superscript -1]. United States. Dept. of Defense. ASSURE Program (National Science Foundation (U.S.). Research Experience for Undergraduates (Program). Grant 0754568) 2015-03-04T20:24:30Z 2015-03-04T20:24:30Z 2010-12 2010-07 Article http://purl.org/eprint/type/JournalArticle 0004-637X 1538-4357 http://hdl.handle.net/1721.1/95824 Marengo, M., N. R. Evans, P. Barmby, L. D. Matthews, G. Bono, D. L. Welch, M. Romaniello, D. Huelsman, K. Y. L. Su, and G. G. Fazio. “AN INFRARED NEBULA ASSOCIATED WITH δ CEPHEI: EVIDENCE OF MASS LOSS?” The Astrophysical Journal 725, no. 2 (December 7, 2010): 2392–2400. © 2010 The American Astronomical Society en_US http://dx.doi.org/10.1088/0004-637x/725/2/2392 Astrophysical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf IOP Publishing American Astronomical Society |
| spellingShingle | Marengo, Massimo Evans, N. R. Barmby, P. Bono, G. Welch, D. L. Romaniello, M. Huelsman, D. Su, K. Y. L. Fazio, G. G. Matthews, Lynn D. AN INFRARED NEBULA ASSOCIATED WITH δ CEPHEI: EVIDENCE OF MASS LOSS? |
| title | AN INFRARED NEBULA ASSOCIATED WITH δ CEPHEI: EVIDENCE OF MASS LOSS? |
| title_full | AN INFRARED NEBULA ASSOCIATED WITH δ CEPHEI: EVIDENCE OF MASS LOSS? |
| title_fullStr | AN INFRARED NEBULA ASSOCIATED WITH δ CEPHEI: EVIDENCE OF MASS LOSS? |
| title_full_unstemmed | AN INFRARED NEBULA ASSOCIATED WITH δ CEPHEI: EVIDENCE OF MASS LOSS? |
| title_short | AN INFRARED NEBULA ASSOCIATED WITH δ CEPHEI: EVIDENCE OF MASS LOSS? |
| title_sort | infrared nebula associated with δ cephei evidence of mass loss |
| url | http://hdl.handle.net/1721.1/95824 |
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