Modeling the Galactic ¾ keV X-ray Background

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

keV SOFT X-RAY BACKGROUND

Snowden and coworkers have presented a model for the 1 4 keV soft X-ray diffuse background in which the observed flux is dominated by a ∼ 10 K thermal plasma located in a 100–300 pc diameter bubble surrounding the Sun, but has significant contributions from a very patchy Galactic halo. Halo emission provides about 11% of the total observed flux and is responsible for half of the H I anticorrela...

متن کامل

SMALL - SCALE VARIATIONS IN THE keV X - RAY BACKGROUND ALONG THE 14 GALACTIC PLANE

Forty-two ROSAT Position Sensitive Proportional Counter pointed observations in the Ðrst quadrant (l D 4¡È26¡) of the Galactic plane are mosaicked in order to study the spatial structure of the X-rayÈ emitting gas in the Local Hot Bubble (LHB). X-ray intensity variations at various angular scales are examined in the keV band, and degree-scale variations are detected. In the context of the LHB a...

متن کامل

Resolving the Galactic X - ray background

We use Chandra deep observations of the Galactic Center (GC) region to improve the constraints on the unresolved fraction of the Galactic X-ray background (also known as the Galactic ridge X-ray emission). We emphasize the importance of correcting the measured source counts at low fluxes for bias associated with Poisson noise. We find that at distances of 2 ′ –4 ′ from Sgr A * at least ∼ 40% of...

متن کامل

Earth X-ray albedo for cosmic X-ray background radiation in the 1–1000 keV band

We present calculations of the reflection of the cosmic X-ray background (CXB) by the Earth’s atmosphere in the 1–1000 keV energy range. The calculations include Compton scattering and X-ray fluorescent emission and are based on a realistic chemical composition of the atmosphere. Such calculations are relevant for CXB studies using the Earth as an obscuring screen (as was recently done by INTEG...

متن کامل

Active Galactic Nuclei and the Cosmic X-Ray Background

Active Galactic Nuclei (AGNs) are the most luminous objects in the Universe (besides Gamma-Ray Bursts). Typical spatial scales for these objects are estimated from time variability, giving sizes of around one parsec (Clavel al. 1991, Peterson et al. 1992), similar to our solar system, but with typical luminosities 1011 larger than the Sun. It is believed that their energy comes from the inflow ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: International Astronomical Union Colloquium

سال: 1997

ISSN: 0252-9211

DOI: 10.1017/s0252921100071177