2006ApJ...647L..53F

Query : 2006ApJ...647L..53F

2006ApJ...647L..53F - Astrophys. J., 647, L53-L56 (2006/August-2)

Discovery of carbon/oxygen-depleted blue straggler stars in 47 Tucanae: the chemical signature of a mass transfer formation process.

FERRARO F.R., SABBI E., GRATTON R., PIOTTO G., LANZONI B., CARRETTA E., ROOD R.T., SILLS A., FUSI PECCI F., MOEHLER S., BECCARI G., LUCATELLO S. and COMPAGNI N.

Abstract (from CDS):

We use high-resolution spectra obtained with the ESO Very Large Telescope to measure surface abundance patterns of 43 blue straggler stars (BSSs) in 47 Tuc. We discovered that a subpopulation of BSSs shows a significant depletion of carbon and oxygen with respect to the dominant population. This evidence would suggest the presence of CNO burning products on the BSS surface coming from a deeply peeled parent star, as expected in the case of a mass transfer process. This is the first detection of a chemical signature clearly pointing to a specific BSS formation process in a globular cluster.

Abstract Copyright: ∼

Journal keyword(s): Stars: Blue Stragglers - Galaxy: Globular Clusters: Individual: NGC Number: NGC 104 - Stars: Abundances - Stars: Evolution - Techniques: Spectroscopic

Simbad objects: 13

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Number of rows : 13
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 3914 0
2 Cl* NGC 104 FDP 2835 EB* 00 24 07.885 -72 05 02.00 17.085   16.761   16.259 ~ 9 0
3 Cl* NGC 104 WSB V14 EB* 00 25 11.1617072872 -72 12 14.446663081     15.860     ~ 4 0
4 Cl* NGC 104 WSB V6 EB* 00 26 10.5353146791 -72 11 07.773522508     16.461   15.972 ~ 8 0
5 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 1041 0
6 NGC 2682 OpC 08 51 23.0 +11 48 50           ~ 2342 0
7 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2478 0
8 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 1977 0
9 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 715 0
10 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2000 0
11 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 853 0
12 Cl* NGC 104 GVS 100384 * ~ ~           ~ 3 0
13 Cl* NGC 104 GVS 102835 * ~ ~           ~ 3 0

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