2005A&A...434..235F

Query : 2005A&A...434..235F

2005A&A...434..235F - Astronomy and Astrophysics, volume 434235-245 (2005/4-4)

Abundance anomalies in hot horizontal branch stars of the galactic globular cluster NGC 1904.

FABBIAN D., RECIO-BLANCO A., GRATTON R.G. and PIOTTO G.

Abstract (from CDS):

We present abundance measurements, based on high-resolution optical spectroscopic data obtained with the Ultraviolet and Visual Echelle Spectrograph mounted on Kueyen (Very Large Telescope UT2), for ten stars in the extended blue horizontal branch of the Galactic globular cluster NGC 1904 (M79). In agreement with previous findings for other clusters, we obtain normal abundances for stars cooler than Teff∼11000K, and largely anomalous abundances for hotter stars: large He depletions, and overabundances of Fe, Ti, Cr, P and Mn. The abundances of Mg, Si and Ca are roughly normal, in the hot stars as well as in the cooler ones. This abundance pattern can be attributed to the onset of diffusion and to radiation pressure in the stable atmospheres of hot horizontal branch stars.

Abstract Copyright: ∼

Journal keyword(s): globular clusters: general - globular clusters: individual: M79 - stars: horizontal-branch - stars: abundances

VizieR on-line data: <Available at CDS (J/A+A/434/235): stars.dat ews.dat>

Nomenclature: Table 3: Cl* NGC 1904 FRG NNN N=21 among N≥555.

Simbad objects: 26

goto Full paper

goto View the references in ADS

Number of rows : 26
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 1904 90 * 05 24 02.0718928392 -24 31 35.042711700   16.49 16.39   16.73 ~ 5 0
2 Cl* NGC 1904 FCF 1233 * 05 24 07.6980640632 -24 32 13.415347464   16.73 16.74   16.25 ~ 3 0
3 Cl* NGC 1904 FCF 1339 * 05 24 08.1734240948 -24 32 12.800601259   17.11 17.22     ~ 3 0
4 M 79 GlC 05 24 10.59 -24 31 27.3     8.16     ~ 883 0
5 NGC 1904 148 HS? 05 24 10.6560947640 -24 32 46.679171244   17.42 17.24     ~ 7 0
6 Cl* NGC 1904 FRG 363 * 05 24 13.4 -24 31 26   17.32 17.45     ~ 2 0
7 NGC 1904 262 Pu* 05 24 13.5209314395 -24 30 26.586697723   16.68 16.56   16.67 ~ 6 0
8 NGC 1904 266 * 05 24 14.2175653512 -24 29 52.258280280   16.55 16.40   16.54 ~ 5 0
9 Cl* NGC 1904 FCF 2270 * 05 24 15.69 -24 31 24.8   16.76 16.75     ~ 3 0
10 Cl* NGC 1904 FCF 2872 * 05 24 16.04 -24 30 37.6   17.58 17.68   16.40 ~ 3 0
11 Cl* NGC 1904 FRG 209 * 05 24 16.2784630416 -24 32 17.025023004   16.16 16.11   16.24 ~ 2 0
12 NGC 1904 226 * 05 24 16.303 -24 31 30.41   16.67 16.56     ~ 5 0
13 NGC 1904 225 * 05 24 16.3688549448 -24 31 36.428142360   16.87 16.72     ~ 5 0
14 Cl* NGC 1904 FCF 1703 * 05 24 16.4613971280 -24 31 58.461031272   17.48 17.56     ~ 3 0
15 NGC 1904 258 * 05 24 17.2980408144 -24 30 18.454157280   16.48 16.46   16.59 ~ 5 0
16 NGC 1904 230 * 05 24 17.7378267648 -24 31 24.313438560   16.42 16.34   16.16 ~ 5 0
17 NGC 1904 249 * 05 24 17.9113068048 -24 30 39.853415736   16.4 16.25 17.09 16.22 ~ 5 0
18 NGC 1904 221 * 05 24 19.1157258480 -24 31 46.154225280   16.39 16.25 16.07 16.00 ~ 5 0
19 NGC 1904 205 * 05 24 19.7779335768 -24 32 27.222470232   16.41 16.29   16.02 ~ 5 0
20 NGC 1904 275 * 05 24 21.6693091704 -24 28 59.142411156   16.47 16.40     ~ 7 0
21 NGC 1904 278 * 05 24 27.2856925248 -24 29 15.216126900   16.51 16.38   16.38 ~ 7 0
22 BD+30 2431 HB* 13 38 24.7651989120 +29 21 56.007255024   9.89 10.02     B5Vp 127 0
23 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
24 * 3 Cen ** 13 51 49.60136 -32 59 38.7067           B5III+B9IV 256 0
25 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2291 0
26 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0

To bookmark this query, right click on this link: simbad:objects in 2005A&A...434..235F and select 'bookmark this link' or equivalent in the popup menu