We have performed a search for variable stars in the dwarf irregular galaxy NGC 6822 using wide-field multi-epoch VI photometry down to a limiting magnitude $V \sim 22$. Apart from the Cepheid variables in this galaxy already reported in an earlier paper by Pietrzynski et al. (2004), we have found 1019 “non-periodic” variable stars, 50 periodically variable stars with periods ranging from 0.12 to 66 days and 146 probably periodic variables. Twelve of these stars are eclipsing binaries and fifteen are likely new, low-amplitude Cepheids. Interestingly, seven of these Cepheid candidates have periods longer than 100 days, have very low amplitudes (less than 0.2 mag in I), and are very red. They could be young, massive Cepheids still embedded in...
We present new optical (BVI) time-series data for the evolved variable stars in the Carina dwarf sph...
I describe two ongoing projects related with variable stars in the satellites of the MilkyWay. In th...
I describe two ongoing projects related with variable stars in the satellites of the MilkyWay. In th...
We have performed a search for variable stars in the dwarf irregular galaxy NGC 6822 using wide-fiel...
The nearby galaxies IC 1613 and NGC 6822 were observed over four years to detect short period Cephe...
The results of a CCD survey for variability of stars in the nearby galaxy NGC 6822 are presented. T...
The results of a CCD survey for variability of stars in the nearby galaxy NGC 6822 are presented. Th...
Observations of the resolved stars obtained over a period of 11 years in the Local Group dwarf irreg...
The important role of Cepheid and RR Lyrae variable stars and what they teach us about dwarf galaxie...
We present Cousins R and I band photometry of variable stars in a ${\sim}13'\times 13'$ region in th...
We present Cousins R and I band photometry of variable stars in a ${\sim}13'\times 13'$ region in th...
We present Cousins R and I band photometry of variable stars in a ${\sim}13'\times 13'$ region in th...
Context. Recent progress in the seismic interpretation of field ß Cep stars has resulted in improvem...
The frequency–period distribution and other properties of Cepheids in IC 1613 are discussed and com...
We present new optical (BVI) time-series data for the evolved variable stars in the Carina dwarf sph...
We present new optical (BVI) time-series data for the evolved variable stars in the Carina dwarf sph...
I describe two ongoing projects related with variable stars in the satellites of the MilkyWay. In th...
I describe two ongoing projects related with variable stars in the satellites of the MilkyWay. In th...
We have performed a search for variable stars in the dwarf irregular galaxy NGC 6822 using wide-fiel...
The nearby galaxies IC 1613 and NGC 6822 were observed over four years to detect short period Cephe...
The results of a CCD survey for variability of stars in the nearby galaxy NGC 6822 are presented. T...
The results of a CCD survey for variability of stars in the nearby galaxy NGC 6822 are presented. Th...
Observations of the resolved stars obtained over a period of 11 years in the Local Group dwarf irreg...
The important role of Cepheid and RR Lyrae variable stars and what they teach us about dwarf galaxie...
We present Cousins R and I band photometry of variable stars in a ${\sim}13'\times 13'$ region in th...
We present Cousins R and I band photometry of variable stars in a ${\sim}13'\times 13'$ region in th...
We present Cousins R and I band photometry of variable stars in a ${\sim}13'\times 13'$ region in th...
Context. Recent progress in the seismic interpretation of field ß Cep stars has resulted in improvem...
The frequency–period distribution and other properties of Cepheids in IC 1613 are discussed and com...
We present new optical (BVI) time-series data for the evolved variable stars in the Carina dwarf sph...
We present new optical (BVI) time-series data for the evolved variable stars in the Carina dwarf sph...
I describe two ongoing projects related with variable stars in the satellites of the MilkyWay. In th...
I describe two ongoing projects related with variable stars in the satellites of the MilkyWay. In th...