Use of DPOSS data to study globular cluster halos: an application to M 92

Simple item page
dc.creatorTesta, V.
dc.creatorZaggia, S. R.
dc.creatorAndreon, S.
dc.creatorLongo, G.
dc.creatorScaramella, R.
dc.creatorDjorgovski, S. G.
dc.creatorde Carvalho, R.
dc.date2000-02-14
dc.date.accessioned2026-07-07T01:52:17Z
dc.date.available2026-07-07T01:52:17Z
dc.descriptionWe exploited the large areal coverage offered by the DPOSS to analyze the outermost regions of the galactic globular cluster M 92. Two independent photometric reduction programs (SKICAT and DAOPHOT) were used to construct a color-magnitude diagram and a surface density profile for this cluster, based on J- and F-band DPOSS plates. A strong similarity has been found in the performance of the two programs in the low--crowded outermost cluster regions. After removing the background contribution, we obtained the cluster outer surface density profile down to a surface brightness magnitude of mu_V ~ 31 mag/sq.arcsec and matched it with the inner profile of Trager et al. 1995. The profile shapes match very well: since our data are uncalibrated, the shift in magnitude between the profiles has been also used to calibrate our profile. The analysis shows that the cluster has an extra tidal halo extending out to ~ 30 arcmin from the cluster center at a 3 sigma level over the background noise. This halo is revealed to be almost circular.
dc.description9 pages, 6 figures, accepted for publication on A&A, main journal. Uses aa.cls. Full resolution figures are available on request from the first author (testa@coma.mporzio.astro.it)
dc.identifierhttps://arxiv.org/abs/astro-ph/0002280
dc.identifierhttp://arxiv.org/abs/astro-ph/0002280
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/571
dc.subjectAstrophysics
dc.titleUse of DPOSS data to study globular cluster halos: an application to M 92
dc.typetext

Files

Collections

arXiv