A Suzaku Study of Ejecta Structure and Origin of Hard X-ray Emission in the Supernova Remnant G156.2+5.7 [PDF]
, 2012 We report an X-ray study of the evolved Galactic supernova remnant (SNR) G156.2+5.7 based on six pointing observations with Suzaku. The remnant's large extent (100$\arcmin$ in diameter) allows us to investigate its radial structure in the northwestern ...
Katsuda, Satoru +5 more
core +3 more sources
VLT optical BVR observations of two bright supernova Ia hosts in the Virgo cluster - Surface brightness fluctuation analysis [PDF]
, 2011 Aims. We study the characteristics of field stars in the two bright ellipticals NGC 4621 and NGC 4374 in the Virgo cluster to derive accurate distances and stellar population properties.
M. Cantiello +4 more
semanticscholar +1 more source
The Effect Of Alpha-Element Enhancement On Surface Brightness Fluctuation Magnitudes And Broad-Band Colors [PDF]
Proceedings of the International Astronomical Union, 2006 We present the effects due to alpha-element enhancement on surface brightness fluctuation magnitudes and broad-band colors in order to investigate the calibration zero-point.
Hyun-Chul Lee, G. Worthey, J. Blakeslee
semanticscholar +1 more source
Observations of surface-brightness fluctuations in Virgo
The Astronomical Journal, 1990 VRI photometric observations of surface-brightness fluctuation in 13 Virgo Cluster galaxies, M32, and NGC 3379, obtained using an 800 x 800 CCD array on the 4-m telescope at KPNO during March 1989, are reported. The data-reduction techniques are described in detail, and the results are presented in tables and graphs.
John L. Tonry +2 more
openaire +1 more source
Optical Surface Brightness Fluctuations of Shell Galaxies toward 100 Mpc [PDF]
The Astrophysical Journal, 2008 We measure F814W Surface Brightness Fluctuations (SBF) for a sample of distant shell galaxies with radial velocities ranging from 4000 to 8000 km/s. The distance at galaxies is then evaluated by using the SBF method. For this purpose, theoretical SBF magnitudes for the ACS@HST filters are computed for single burst stellar populations covering a wide ...
Biscardi, I. +3 more
openaire +3 more sources
Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity
Molecular Oncology, EarlyView.Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung +17 more
wiley +1 more source
Zangetsu: A Candidate Isolated, Quiescent, and Backsplash Ultra-diffuse Galaxy in the COSMOS Field
The Astrophysical JournalDeep imaging surveys have changed our view of the low surface brightness (LSB) Universe. The “renaissance” of the LSB galaxy population, as a prime example of this recent development, continues to challenge our understanding of galaxy formation. Here, we
Leyao Wei +5 more
doaj +1 more source
Statistical Isotropy violation of the CMB brightness fluctuations
, 2010 Certain anomalies at large angular scales in the cosmic microwave background measured by WMAP have been suggested as possible evidence of breakdown of statistical isotropy(SI).
B. Gold +10 more
core +1 more source
Surface brightness fluctuations as primary and secondary distance indicators [PDF]
Astrophysics and Space Science, 2012 The surface brightness fluctuations (SBF) method measures the variance in a galaxy's light distribution arising from fluctuations in the numbers and luminosities of individual stars per resolution element. Once calibrated for stellar population effects, SBF measurements with HST provide distances to early-type galaxies with unrivaled precision. Optical
openaire +3 more sources
Stellar populations and surface brightness fluctuations: new observations and models [PDF]
Monthly Notices of the Royal Astronomical Society, 2001 24 pages with 17 embedded figures.
Blakeslee, John P. +2 more
openaire +2 more sources