Structural parameters of Mayall II = G1 in M31
نویسندگان
چکیده
منابع مشابه
Structural Parameters of Mayall II = G1 in M31
Mayall II = G1 is one of the most luminous globular clusters (GCs) known in M31. New deep, high-resolution observations with the Advanced Camera for Surveys on the Hubble Space Telescope are used to provide accurate photometric data to the smallest radii yet. In particular, we present the precise variation of ellipticity and position angle, and of surface brightness for the core of the object. ...
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The globular cluster G1 (Mayall II) in M31 is the most massive (∼10M⊙) stellar cluster in the Local Group, and it has the highest central velocity dispersion (∼28 kms−1). It has been claimed to host a central ∼20,000 M⊙ black hole, but these claims have been controversial. We report here the XMM-Newton detection of X-ray emission from G1 at a level of Lx ≈ 2×1036 ergs−1. This emission could be ...
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We present deep HST/ACS observations of the G1 clump, a distinct stellar overdensity lying at ∼ 30 kpc along the south-western major axis of M31 close to the G1 globular cluster (Ferguson et al. 2002). Our well-populated colour-magnitude diagram reaches ∼7 magnitudes below the red giant branch tip with 90% completeness, and allows the detection of various morphological features which can be use...
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We present the detection of a 2.0(+1.4,−0.8)× 104 M⊙ black hole (BH) in the stellar cluster G1 (Mayall II), based on data taken with the Space Telescope Imaging Spectrograph onboard the Hubble Space Telescope. G1 is one of the most massive stellar clusters in M31. The central velocity dispersion (25 km s−1) and the measured BH mass of G1 places it on a linear extrapolation of the correlation be...
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Ultraviolet imaging of the remnant of Supernova 1885 in M31 with the Hubble Space Telescope using the F255W filter on the WFPC2 reveals a dark spot of Fe II absorption at the remnant’s known position in the bulge of M31. The diameter of the absorbing spot is 0. 55 ± 0. 15, slightly smaller than, but consistent with, the 0. 70 ± 0. 05 diameter measured in the higher quality WFPC2 Ca II absorptio...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2007
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2007.11573.x