ARP 227 - A case for shells without mergers?

Details ARP 227 - A case for shells without mergers? ARP 227 - A case for shells without mergers?

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....94..300s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 94, Aug. 1987, p. 300-305, 528.

Astronomy and Astrophysics

Astronomy

27

Astronomical Photometry, Elliptical Galaxies, Intergalactic Media, Spectral Energy Distribution, Charge Coupled Devices, Data Reduction

Scientific paper

Multicolor surface photometry is presented for shell galaxy Arp 227 (NGC 474). The profile shape and colors confirm that this object is an SO. Unlike previous color measurements of blue shells (Carter et al. 1982; Forte et al. 1986), the shells of this system are red (B-V = 0.90 + or - 0.08), identical within the errors to the color of the parent galaxy (B-V = 0.94). Possible origins for the shells are tidally liberated material from the parent galaxy, stripped matter from a nearby companion, or the merger with a low-luminosity elliptical.

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