Extragalactic dust. I - NGC 7070A

Details Extragalactic dust. I - NGC 7070A Extragalactic dust. I - NGC 7070A

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...143..399b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 143, no. 2, Feb. 1985, p. 399-407.

Astronomy and Astrophysics

Astrophysics

15

Accretion Disks, Cosmic Dust, Disk Galaxies, Intergalactic Media, Astronomical Catalogs, Astronomical Photography, Data Reduction, Extinction, Granular Materials, Ubv Spectra

Scientific paper

Deep U, B, V, and R plates of the lenticular galaxy NGC 7070A were obtained at the prime focus of the 3.6-m ESO reflector. From these plates some properties of the dust particles within the dark lanes, which are seen projected against the main body of the galaxy, are derived. The typical size of a dust grain is probably somewhat smaller than that usually taken as canonical for galactic dust. The dust lanes are attributed to the accretion of a small disk galaxy, containing at least about 4 x 10 to the 7th solar mass of gas and dust, by the lenticular galaxy. This accretion event, approximately 10 to the 9th yr in the past, produced also luminous tails from NGC 7070A towards a small group of nearby galaxies and incomplete shells around the S0 galaxy. This is probably the first case of a disk galaxy showing shells, dust lanes and tails at the same time.

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