galaxies: individual: NGC 6822Local GroupRecent estimates of the Cepheid distance modulus of NGC 6822 differ by 0.18 mag. To investigate this we present new multi-epoch JHKS photometry of classical Cepheids in the central region of NGC 6822 and show that there is a zero-point difference from...
Galaxies: Individual: NGC Number: NGC 6822Techniques: PhotometricWe have obtained deep near-infrared images in J and K filters of four fields in the Sculptor Group spiral galaxy NGC 247 with the ESO VLT and Infrared Spectrometer and Array Camera. For a sample of 10 Cepheids in these fields,...
Accurate astronomical distance determination is crucial for all fields in astrophysics, from Galactic to cosmological scales. Despite, or perhaps because of, significant efforts to determine accurate distances, using a wide range of methods, tracers, and techniques, an internally consistent astronomical di...
SagDIG are DDO 210, at 0.35 Mpc and NGC 6822, at 0.56 Mpc. Hence SagDIG seems to be a rather isolated galaxy in the periphery of the Local Group. The average magnitude of the three brightest stars in a galaxy is a simple, frequently ...
The distance to NGC 6822 has been estimated using the random-phase I band photometry of seven Cepheids (V7(I=16.31), V5(I=18.97), V6(I=18.44), V3(I=17.88), V1(I=18.05), V28(I=17.61), and V2(I=17.29)) combined with their periods given by Kayser. We have obtained Δ(m — ...
Results are presented on a study of the short period variable stars in the dwarf irregular galaxy NGC 6822. We observed an almost uniformly populated classical instability strip from the Horizontal Branch up to the Classical Cepheid region. The main goal we achieved from the analysis of the ...
The advantages and limitations of the method as presently used, are highlighted; and finally, new apparent infrared distance moduli relative to the LMC are given for all late-type resolved members of the Local Group with known Cepheids. These include the LMC, SMC, NGC 6822, M33, M31 and ...