On tidal radius determination for a globular cluster

✍ Scribed by S. Ninkovica

• Publisher: John Wiley and Sons
• Year: 1985
• Tongue: English
• Weight: 292 KB
• Volume: 306
• Category: Article
• ISSN: 0004-6337
• DOI: 10.1002/asna.2113060413

✦ Synopsis

Istroiiomical Obsvrvatory

.I titla1 r.itlius ilctcriiiiiiatioii f o I ii ~l o l ) u l a r cluster bahccl oil its tlciisity iiiiiiiiiiuiii, wliicli is caused by the galactic titlal forccs aiid tlcri-

Hesuits obtailict~ on thc basis of the Schiilidt liiodrl for two clusters arc i l l a satisfactory xgrc.seiiiciit witli tliose obtained carlicr by iiicaiis of otlicr iiictliods. I \ iiiass dctcriiiiiiation for the clustcrs tlirougli thc tidal radius, when the latter oiic is itlcntificd with tlic cluster pcrigalactic clistance, yields unusually large inass values. Probably, tlic tidal radius sliould be itlciitificd I \ itli tlic instaiitancous gal;ictcicentric distance. Use of inotlcls more rccciit tliari tlic Schmidt oiic intlicatcs that a globular cluster inay coiitaiii a significant portion of an iiivisiblc iiiterstcllar matter.