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Dust Deficiency in the Interacting Galaxy NGC 3077

Observatorio Astronómico de Quito, Escuela Politécnica Nacional, Av. Gran Colombia S/N, Quito 170403, Ecuador
H.H. Wills Physics Laboratory, University of Bristol, Tyndall Ave, Bristol BS8 1TL, UK
Author to whom correspondence should be addressed.
Academic Editor: Emilio Elizalde
Galaxies 2017, 5(3), 53;
Received: 24 July 2017 / Revised: 12 September 2017 / Accepted: 13 September 2017 / Published: 15 September 2017
(This article belongs to the Special Issue On the Origin (and Evolution) of Baryonic Galaxy Halos)
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Using 70 μ m observations taken with the PACS instrument of the Herschel space telescope, the dust content of the nearby and interacting spiral galaxy NGC 3077 has been compared with the dust content of the isolated galaxies such as NGC 2841, NGC 3184 and NGC 3351. The dust content has allowed us to derive dust-to-gas ratios for the four spiral galaxies of our sample. We find that NGC 2841, NGC 3184 and NGC 3351 have dust masses of 6.5–9.1 × 10 7 M , which are a factor of ∼10 higher than the value found for NGC 3077. This result shows that NGC 3077 is a dust deficient galaxy, as was expected, because this galaxy is affected by tidal interactions with its neighboring galaxies M81 and M82. NGC 3077 reveals a dust-to-gas ratio of 17.5%, much higher than the average ratio of 1.8% of the isolated galaxies, evidencing that NGC 3077 is also deficient in H 2 + HI gas. Therefore, it seems that, in this galaxy, gas has been stripped more efficiently than dust. View Full-Text
Keywords: spiral galaxies; dust mass; dust-to-gas ratio spiral galaxies; dust mass; dust-to-gas ratio

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Armijos-Abendaño, J.; López, E.; Llerena, M.; Aldás, F.; Logan, C. Dust Deficiency in the Interacting Galaxy NGC 3077. Galaxies 2017, 5, 53.

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