يسرنا في مركز إنديكيتورز أن نشارككم دليل المساءلة... يُناقش الدليل مفهوم المساءلة وأهميتها وأهم المعايير الواجبة لتحقيقها في القطاع الإنساني. للوصول إلى الدليل، يرجى الضغط على الرابط أدناه: https://bit.ly/2lAuMUF نَأمل بأن تسهم أعمالنا... more
يسرنا في مركز إنديكيتورز أن نشارككم دليل المساءلة...
يُناقش الدليل مفهوم المساءلة وأهميتها وأهم المعايير الواجبة لتحقيقها في القطاع الإنساني.
للوصول إلى الدليل، يرجى الضغط على الرابط أدناه: https://bit.ly/2lAuMUF نَأمل بأن تسهم أعمالنا في تغيير واقع سوريا نحو الأفضل ...
Context. The AGN bolometric correction is a key element for understanding black hole (BH) demographics and computing accurate BH accretion histories from AGN luminosities. However, current estimates still differ from each other by up to a... more
Context. The AGN bolometric correction is a key element for understanding black hole (BH) demographics and computing accurate BH accretion histories from AGN luminosities. However, current estimates still differ from each other by up to a factor of two to three, and rely on extrapolations at the lowest and highest luminosities. Aims. Here we revisit this fundamental question by presenting general hard X-ray (KX) and optical (KO) bolometric corrections, computed by combining several AGN samples spanning the widest (about 7 dex) luminosity range ever used for this type of studies. Methods. We analysed a total of ∼1000 type 1 and type 2 AGN for which we performed a dedicated SED-fitting. Results. We provide a bolometric correction separately for type 1 and type 2 AGN; the two bolometric corrections agree in the overlapping luminosity range. Based on this we computed for the first time a universal bolometric correction for the whole AGN sample (both type 1 and type 2). We found that KX ...
Sally Kral, an assistant member of the Cornell University Graduate School's communications and outreach branch, interviewed me for the Graduate Student Spotlight series whose archive may be found on the Cornell Graduate School website and... more
Sally Kral, an assistant member of the Cornell University Graduate School's communications and outreach branch, interviewed me for the Graduate Student Spotlight series whose archive may be found on the Cornell Graduate School website and which was distributed as part of the weekly Graduate School announcements e-mail.
The Large APEX Bolometer Camera, LABOCA, has been commissioned for operation as a new facility instrument t the Atacama Pathfinder Experiment 12m submillimeter telescope. This new 295-bolometer total power camera, operating in the 870... more
The Large APEX Bolometer Camera, LABOCA, has been commissioned for operation as a new facility instrument t the Atacama Pathfinder Experiment 12m submillimeter telescope. This new 295-bolometer total power camera, operating in the 870 micron atmospheric window, combined with the high efficiency of APEX and the excellent atmospheric transmission at the site, offers unprecedented capability in mapping submillimeter continuum emission for a wide range of astronomical purposes.
