Extremely Luminous Atmospheres
نویسندگان
چکیده
منابع مشابه
Obscuration in Extremely Luminous Quasars
The SEDs and IR spectra of a remarkable sample of obscured AGNs selected in the MIR are modeled with recent clumpy torus models. The sample contains 21 AGNs at z 1⁄4 1:3Y3 discovered in the largest Spitzer surveys (SWIRE, NDWFS, and FLS) by means of their extremely red IR to optical colors. All sources show the 9.7 m silicate feature in absorption and have extremeMIR luminosities [L(6 m) ’ 10 e...
متن کاملA Phase Transition of Luminous Atmospheres
We show that atmospheres having a nonnegligible radiative support undergo a second order phase transition above a critical radiative ux. This ux is less than but of order of the ux that corresponds to the Eddington luminosity limit. The trivial exponentially decaying solution, namely, the horizontally uniform solution, is energetically preferred for uxes below the critical one. However, the pre...
متن کاملSN 2006tf: PRECURSOR ERUPTIONS AND THE OPTICALLY THICK REGIME OF EXTREMELY LUMINOUS TYPE IIn SUPERNOVAE
SN 2006tf is the third most luminous supernova (SN) discovered so far, after SN 2005ap and SN 2006gy. SN 2006tf is valuable because it provides a link between two regimes: (1) luminous type IIn supernovae powered by emission directly from interaction with circumstellar material (CSM), and (2) the most extremely luminous SNe where the CSM interaction is so optically thick that energy must diffus...
متن کاملTHE EXTREMELY LUMINOUS SUPERNOVA 2006gy AT LATE PHASE: DETECTION OF OPTICAL EMISSION FROM SUPERNOVA
Supernova (SN) 2006gy is an extremely luminous Type IIn SN characterized by the bright peak magnitude MR ∼ −22 mag and its long duration. The mechanism giving rise to its huge luminosity is still unclear. We performed optical spectroscopy and photometry of SN 2006gy at late time, ∼ 400 days after the explosion, with the Subaru/FOCAS in a good seeing condition. We carefully extracted the SN comp...
متن کاملExtremely Luminous Water Vapor Emission from a Type 2 Quasar at Redshift z = 0 . 66
A search for water masers in 47 Sloan Digital Sky Survey Type 2 quasars using the Green Bank Telescope has yielded a detection at a redshift of z = 0.660. This maser is more than an order of magnitude higher in redshift than any previously known and, with a total isotropic luminosity of 23,000 L⊙, also the most powerful. The presence and detectability of water masers in quasars at z ∼ 0.3− 0.8 ...
متن کاملذخیره 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: 1999
ISSN: 0252-9211
DOI: 10.1017/s025292110007192x