2001A&A...376..793M


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET18:34:05

2001A&A...376..793M - Astronomy and Astrophysics, volume 376, 793-802 (2001/9-4)

High K-band surface brightness fluctuations in NGC 1427 and NGC 720.

MEI S., KISSLER-PATIG M., SILVA D.R. and QUINN P.J.

Abstract (from CDS):

We have observed K-band Surface Brightness Fluctuations (SBF) in NGC 1427 and NGC 720. We combine our measurements with distance measurements based on I-band SBF distance moduli and distance moduli derived by other distance indicators. When using distances from I-band SBF, we obtain <M>K=-6.55±0.27 for NGC 1427 and <M>K=-6.43±0.18 for NGC 720. When using an average of direct distance measurements, we obtain <M>K=-6.17±0.23 for NGC 1427 and <M>K=-6.14±0.24 for NGC 720. For both galaxies, <M>K lies well above the average value used as a calibration for distance indication (<M>K=-5.61±0.12 Jensen et al., 1998ApJ...505..111J). In NGC 720 the high K-band SBF are most probably due to an intermediate-age population. However, there is no hint from current data for any anomaly in the stellar population of NGC 1427. These large variations of <M>K in several galaxies underline once more the need for a better understanding of <M>K as a function of stellar population properties (Mei et al., 2001A&A...371..779M; Liu et al., 2001, ApJ, submitted), especially with respect to the potential presence of intermediate-age populations.

Abstract Copyright:

Journal keyword(s): galaxies: distances - individual: NGC 1427, NGC 720

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 2E 0150.5-1358 ClG 01 53 00.40 -13 44 18.0           ~ 386 0
2 NGC 720 GiG 01 53 00.523 -13 44 19.25   12.4   10.36   ~ 494 0
3 ACO S 373 ClG 03 38 30 -35 27.3           ~ 1588 0
4 NGC 1427 GiG 03 42 19.4447168502 -35 23 33.193682690   11.89   10.44   ~ 254 0
5 NGC 4365 GiG 12 24 28.228 +07 19 03.07   11.5       ~ 805 0
6 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5979 0
7 NGC 4489 GiG 12 30 52.240 +16 45 31.31   13.2       ~ 242 0

    Equat.    Gal    SGal    Ecl

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2021.02.26-18:34:05

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