SIMBAD references

2003A&A...412..721P - Astronomy and Astrophysics, volume 412, 721-725 (2003/12-4)

CCD photometric search for peculiar stars in open clusters. V. NGC 2099, NGC 3114, NGC 6204, NGC 6705 and NGC 6756.


Abstract (from CDS):

We have investigated 1008 objects in the area of five intermediate age open clusters (NGC 2099, NGC 3114, NGC 6204, NGC 6705 and NGC 6756) via the narrow band Δa-system. The detection limit for photometric peculiarity is very low (always less than 0.009mag) due to the high number of individual frames used (193 in total). We have detected six peculiar objects in NGC 6705 and NGC 6756 from which one in the latter is almost certainly an unreddened late type foreground star. The remaining five stars are probably cluster members and bona fide chemically peculiar objects (two are λ Bootis type candidates). Furthermore, we have investigated NGC 3114, a cluster for which already photoelectric Δa-measurements exist. A comparison of the CCD and photoelectric values shows very good agreement. Again, the high capability of our CCD Δa-photometric system to sort out true peculiar objects together with additional measurements from broad or intermediate band photometry is demonstrated.

Abstract Copyright:

Journal keyword(s): stars: chemically peculiar - stars: early-type - techniques: photometric - open clusters and associations: general

VizieR on-line data: <Available at CDS (J/A+A/412/721): table4.dat table5.dat table6.dat table7.dat table8.dat>

Nomenclature: Table 4: Cl* NGC 2099 PPM NN (Nos 1-41). Table 5: Cl* NGC 3114 PPM NNN (Nos 1-271). Table 6: Cl* NGC 6204 PPM NNN (Nos 1-319). Table 7: Cl* NGC 6705 PPM NNN (Nos 1-312). Table 8: Cl* NGC 6756 PPM NN (Nos 1-65).

CDS comments: Table 3 : designation 'NN' in column 2 not in Simbad.

Simbad objects: 1014

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