The Trail of Discrete X‐Ray Sources in the Early‐Type Galaxy NGC 4261: Anisotropy in the Globular Cluster Distribution?

2005 ◽  
Vol 634 (1) ◽  
pp. 272-280 ◽  
Author(s):  
Lea Giordano ◽  
Luca Cortese ◽  
Ginevra Trinchieri ◽  
Anna Wolter ◽  
Monica Colpi ◽  
...  
Keyword(s):  
Globular Cluster ◽  
Early Type ◽  
X Ray ◽  
Cluster Distribution ◽  
Early Type Galaxy

scholarly journals The trail of discrete X-ray sources in the early-type galaxy NGC 4261: anisotropy in the globular cluster distribution

2005 ◽  
Vol 1 (S230) ◽  
pp. 205-209
Author(s):  
Ginevra Trinchieri ◽  
Lea Giordano ◽  
Luca Cortese ◽  
Anna Wolter ◽  
Monica Colpi ◽  
...  
Keyword(s):  
Globular Cluster ◽  
Early Type ◽  
X Ray ◽  
Cluster Distribution ◽  
Early Type Galaxy

scholarly journals Survey of Gravitationally Lensed Objects in HSC Imaging (SuGOHI) – VII. Discovery and confirmation of three strongly lensed quasars†

2021 ◽  
Vol 502 (1) ◽  
pp. 1487-1493
Author(s):  
Anton T Jaelani ◽  
Cristian E Rusu ◽  
Issha Kayo ◽  
Anupreeta More ◽  
Alessandro Sonnenfeld ◽  
...  
Keyword(s):  
Spectroscopic Data ◽  
Point Sources ◽  
Sloan Digital Sky Survey ◽  
Early Type ◽  
Blue Point ◽  
X Ray ◽  
Quasar Spectra ◽  
Strategic Program ◽  
Early Type Galaxy

ABSTRACT We present spectroscopic confirmation of three new two-image gravitationally lensed quasars, compiled from existing strong lens and X-ray catalogues. Images of HSC J091843.27–022007.5 show a red galaxy with two blue point sources at either side, separated by 2.26 arcsec. This system has a source and a lens redshifts zs = 0.804 and zℓ = 0.459, respectively, as obtained by our follow-up spectroscopic data. CXCO J100201.50+020330.0 shows two point sources separated by 0.85 arcsec on either side of an early-type galaxy. The follow-up spectroscopic data confirm the fainter quasar has the same redshift with the brighter quasar from the Sloan Digital Sky Survey (SDSS) fiber spectrum at zs = 2.016. The deflecting foreground galaxy is a typical early-type galaxy at a redshift of zℓ = 0.439. SDSS J135944.21+012809.8 has two point sources with quasar spectra at the same redshift zs = 1.096, separated by 1.05 arcsec, and fits to the HSC images confirm the presence of a galaxy between these. These discoveries demonstrate the power of the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP)’s deep imaging and wide sky coverage. Combined with existing X-ray source catalogues and follow-up spectroscopy, the HSC-SSP provides us unique opportunities to find multiple-image quasars lensed by a foreground galaxy.

The X‐Ray–faint Early‐Type Galaxy NGC 4697

2000 ◽  
Vol 544 (1) ◽  
pp. 293-301 ◽  
Author(s):  
Jimmy A. Irwin ◽  
Craig L. Sarazin ◽  
Joel N. Bregman
Keyword(s):  
Early Type ◽  
X Ray ◽  
Early Type Galaxy

scholarly journals X-Ray Binaries in Early Type Galaxies and the Globular Cluster Connection

2004 ◽  
Vol 194 ◽  
pp. 73-74
Author(s):  
T. J. Maccarone ◽  
A Kundu ◽  
S. E. Zepf ◽  
T. H. Puzia
Keyword(s):  
Globular Cluster ◽  
Globular Clusters ◽  
Early Type ◽  
X Ray ◽  
X Ray Binaries ◽  
Cluster Age ◽  
Made In

AbstractWe summarize the key observations made in recent observations of X-ray sources in early-type galaxies. Typically about half of the X-ray binaries in early-type galaxies are in globular clusters, they are preferentially found in metal rich globular clusters, and there is no indication that cluster-age is an important parameter. Theoretical challenges are presented by these results.

scholarly journals COMPARING X-RAY AND DYNAMICAL MASS PROFILES IN THE EARLY-TYPE GALAXY NGC 4636

2009 ◽  
Vol 706 (2) ◽  
pp. 980-994 ◽  
Author(s):  
Ria Johnson ◽  
Dalia Chakrabarty ◽  
Ewan O'Sullivan ◽  
Somak Raychaudhury
Keyword(s):  
Early Type ◽  
Dynamical Mass ◽  
X Ray ◽  
Early Type Galaxy ◽  
Mass Profiles

Evidence for environmental effects on early-type galaxy X-ray halos

1991 ◽  
Vol 367 ◽  
pp. 476 ◽  
Author(s):  
Raymond E., III White ◽  
Craig L. Sarazin
Keyword(s):  
Environmental Effects ◽  
Early Type ◽  
X Ray ◽  
Early Type Galaxy

scholarly journals The total mass of the early-type galaxy NGC 4649 (M60)

2008 ◽  
pp. 1-7
Author(s):  
S. Samurovic ◽  
M.M. Cirkovic
Keyword(s):  
Dark Matter ◽  
Total Mass ◽  
Globular Clusters ◽  
X Rays ◽  
Early Type ◽  
X Ray ◽  
Modified Newtonian Dynamics ◽  
Newtonian Dynamics ◽  
Early Type Galaxy

In this paper the problem of the total mass and the total mass-to-light ratio of the early-type galaxy NGC 4649 (M60) is analyzed. Use is made of two independent techniques: the X-ray methodology which is based on the temperature of the X-ray halo of NGC 4649 and the tracer mass estimator (TME) which uses globular clusters (GCs) observed in this galaxy. The mass is calculated in Newtonian and Modified Newtonian Dynamics (MOND) approaches and it is found that inside 3 effective radii (Re ) there is no need for large amounts of dark matter. Beyond 3Re the dark matter starts to play important dynamical role. The possible reasons for the discrepancy between the estimates of the total mass based on X-rays and TME in the outer regions of NGC 4649 are also discussed.

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