| Issue |
EPJ Web Conf.
Volume 152, 2017
Wide-Field Variability Surveys: A 21st Century Perspective – 22nd Los Alamos Stellar Pulsation – Conference Series Meeting
|
|
|---|---|---|
| Article Number | 07010 | |
| Number of page(s) | 2 | |
| Section | The distance scale in the era of large surveys | |
| DOI | https://doi.org/10.1051/epjconf/201715207010 | |
| Published online | 08 September 2017 | |
https://doi.org/10.1051/epjconf/201715207010
The Araucaria Project. The distance to the Sculptor group galaxy NGC 7793 from near-infrared photometry of Cepheid variables
1 Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences, Warsaw, Poland
2 Astronomical Observatory of the University of Warsaw, Warsaw, Poland
3 Universidad de Concepción, Departamento de Astronomia, Concepción, Chile
4 Millennium Institute of Astrophysics, Santiago, Chile
Published online: 8 September 2017
We performed deep near-infrared J and K photometry of a field in the Sculptor Group spiral galaxy NGC 7793 using ESO VLT and HAWK-I instrument. We produced a sample of 14 Cepheids whose locations and periods of pulsation were known from our previous paper on distance determination to this galaxy based on V and I bands. We determined mean J and K magnitudes based on measurements from two nights and produced period-luminosity relations for both filters. Using those near-infrared dependencies together with relations for bands V and I obtained before, we were able to obtain true distance modulus for NGC 7793. We also calculated the mean reddening affecting our Cepheids.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.