Bibcode
Piotto, G.; Milone, A. P.; Marino, A. F.; Bedin, L. R.; Anderson, J.; Jerjen, H.; Bellini, A.; Cassisi, S.
Bibliographical reference
The Astrophysical Journal, Volume 775, Issue 1, article id. 15, 7 pp. (2013).
Advertised on:
9
2013
Journal
Citations
36
Refereed citations
35
Description
We present new UV observations for NGC 288, taken with the WFC3 detector
on board the Hubble Space Telescope, and combine them with existing
optical data from the archive to explore the multiple-population
phenomenon in this globular cluster (GC). The WFC3's UV filters have
demonstrated an uncanny ability to distinguish multiple populations
along all photometric sequences in GCs thanks to their exquisite
sensitivity to the atmospheric changes that are telltale signs of
second-generation enrichment. Optical filters, on the other hand, are
more sensitive to stellar-structure changes related to helium
enhancement. By combining both UV and optical data, we can measure the
helium variation. We quantify this enhancement for NGC 288 and find that
the variation is typical of what we have come to expect in other
clusters.
Based on observations with the NASA/ESA Hubble Space Telescope, obtained
at the Space Telescope Science Institute, which is operated by AURA,
Inc., under NASA contract NAS 5-26555.
Related projects
Milky Way and Nearby Galaxies
The general aim of the project is to research the structure, evolutionary history and formation of galaxies through the study of their resolved stellar populations, both from photometry and spectroscopy. The group research concentrates in the most nearby objects, namely the Local Group galaxies including the Milky Way and M33 under the hypothesis
Martín
López Corredoira