| Autor: |
Huxor, Avon P, Phillipps, Steven, Price, James J E, Harniman, Robert L |
| Jazyk: |
angličtina |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Huxor, A P, Phillipps, S, Price, J J E & Harniman, R L 2011, ' Tidal streams in newly discovered M32 analogues : evidence for the stripping scenario ', Monthly Notices of the Royal Astronomical Society, vol. 414, no. 4, pp. 3557-3565 . https://doi.org/10.1111/j.1365-2966.2011.18655.x |
| DOI: |
10.1111/j.1365-2966.2011.18655.x |
| Popis: |
We present two newly discovered compact elliptical (cE) galaxies, exhibiting clear evidence of tidal steams, and found during a search of SDSS DR7 for cE candidates. The structural parameters of the cEs are derived using galfit, giving effective radii, Re, of 388 and 263 pc, and B-band mean surface brightnesses within Re of 19.4 and 19.2 mag arcsec−2. We have re-analysed the SDSS spectra, which indicate that they possess young to intermediate-age stellar populations. These two cEs provide direct evidence, a ‘smoking gun’, for the process of tidal stripping that is believed to be the origin of M32-type galaxies. Both are in small groups with a large spiral fraction, suggesting that we may be seeing the formation of such cE galaxies in dynamically young environments. The more compact of the galaxies is found in a small group not unlike the Local Group, and thus it provides an additional model for the understanding of M32. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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