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1999AJ....117.2757Z - Astron. J., 117, 2757-2780 (1999/June-0)
Deep intermediate-band surface photometry of NGC 5907.
ZHENG Z., SHANG Z., SU H., BURSTEIN D., CHEN J., DENG Z., BYUN Y.-I., CHEN R., CHEN W.-P., DENG L., FAN X., FANG L.-Z., HESTER J.J., JIANG Z., LI Y., LIN W., SUN W.-H., TSAY W.-S., WINDHORST R.A., WU H., XIA X., XU W., XUE S., YAN H., ZHENG Z., ZHOU X., ZHU J., ZOU Z. and LU P.
Abstract (from CDS):
In a previous paper we have shown that NGC 5907 has a luminous ring around it, most plausibly caused by the tidal disruption of a dwarf spheroidal galaxy by the much more massive spiral. Here we show that, for values fainter than 27 R mag.arcsec–2, the surface brightness around NGC 5907 is strongly asymmetric, being mostly brighter on the northwest (ring) side of the galactic midplane. This asymmetry rules out a halo as the cause of the faint surface brightness we see. We find this asymmetry is likely an artifact resulting from a combination of ring light and residual surface brightness at faint levels from stars that our star-masking procedure cannot completely eliminate. The possible existence of an optical face-on warp in NGC 5907, suggested by our Very Large Array H I observations, is too confused with foreground star contamination to be independently studied. Good agreement with the surface photometry of NGC 5907 by other observers leads us to conclude that their data are similarly affected at faint levels by ring light and the residual effects of star masking procedures. Inspection of published images confirm this to be the case. Thus, we conclude that NGC 5907 does not have a faint extended halo.
Abstract Copyright: ∼
Journal keyword(s): Galaxies: Individual: NGC Number: NGC 5907 - galaxies: interactions - galaxies: photometry - galaxies: spiral
VizieR on-line data: <Available at CDS (J/AJ/117/2757): table5.dat>
Simbad objects: 2
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