Age and chemical composition of the globular cluster NGC 6652
نویسندگان
چکیده
منابع مشابه
0 The Age of the Inner Halo Globular Cluster NGC 6652
HST (V, I) photometry has been obtained for the inner halo globular cluster NGC 6652. The photometry reaches ∼ 4 mag below the turn-off and includes a well populated horizontal branch (HB). This cluster is located close to the Galactic center at RGC ≃ 2.0 kpc with a reddening of E(V −I) = 0.15 ± 0.02 and has a metallicity of [Fe/H] ≃ −0.85. Based upon ∆V HB , NGC 6652 is 11.7 ± 1.6 Gyr old. Usi...
متن کاملDetection of X - ray bursts in the globular cluster NGC 6652
Two type IX-rayburstswere detected fromaposition consistent with the transient X-ray source inNGC 6652with the Wide Field Camera of the BeppoSAX satellite, strongly suggesting that this transient is a neutron star. Our detection brings to ten the number of X-ray sources in globular clusters in which a type I X-ray burst has been seen, out of twelve known bright sources. The statistical evidence...
متن کاملXMM - Newton observations of the low – mass X – ray binary XB 1832 – 330 in the galactic globular cluster NGC 6652
Context. We report on two XMM-Newton observations performed in 2006 of the luminous low–mass X–ray binary XB 1832–330 which is located in the galactic globular cluster NGC 6652 and is probably an ultracompact binary (orbital period, P orb , of <1 hour). Aims. The aim of these observations is to investigate the low-energy absorption towards XB 1832–330 and in particular to search for Ne-rich mat...
متن کاملThe Low - Mass X - ray Binary X 1832 − 330 in the Globular Cluster NGC 6652 : A Serendipitous ASCA Observation
The Low Mass X-ray Binary (LMXB) X1832−330 in NGC 6652 is one of 12 bright, or transient, X-ray sources to have been discovered in Globular Clusters. We report on a serendipitous ASCA observation of this Globular Cluster LMXB, during which a Type I burst was detected and the persistent, non-burst emission of the source was at its brightest level recorded to date. No orbital modulation was detec...
متن کاملNa - O Anticorrelation and HB . VI . The chemical composition of the peculiar bulge globular cluster NGC 6388 ⋆
We present the LTE abundance analysis of high resolution spectra for red giant stars in the peculiar bulge globular cluster NGC 6388. Spectra of seven members were taken using the UVES spectrograph at the ESO VLT2 and the multiobject FLAMES facility. We exclude any intrinsic metallicity spread in this cluster: on average, [Fe/H]= −0.44 ± 0.01 ± 0.03 dex on the scale of the present series of pap...
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ژورنال
عنوان ژورنال: Research in Astronomy and Astrophysics
سال: 2020
ISSN: 1674-4527,2397-6209
DOI: 10.1088/1674-4527/20/8/128