Discovery of Two Spectroscopically Peculiar, Low-Luminosity Quasars at [FORMULA][F]z~4[/F][/FORMULA]

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

The host galaxies of low luminosity quasars at high redshift

We present VLT/ISAAC near-infrared imaging of the host galaxies of 15 low luminosity quasars at 1 < z < 2. This work complements our studies to trace the cosmological evolution of the host galaxies of high luminosity quasars. The radioloud (RLQ) and radio-quiet (RQQ) quasars have similar distribution of redshift and luminosity, and together the high and low luminosity quasars cover a large rang...

متن کامل

Radio-Variability in Radio-Quiet Quasars and Low-Luminosity AGN

We report on two surveys of radio-weak AGN to look for radio variability. We find significant variability with an RMS of 10-20% on a timescale of months in radio-quiet and radio-intermediate quasars. This exceeds the variability of radio cores in radio-loud quasars (excluding blazars), which vary only on a few percent level. The variability in radio-quiet quasars confirms that the radio emissio...

متن کامل

Spitzer Discovery of Very Low Luminosity Objects

The Spitzer Space Telescope allows for the first time to search systematically for very low luminosity (. 0.1 L⊙) objects (VeLLOs) associated with dense molecular cores. They may be the first candidate Class 0 sources with sub-stellar masses. We describe such a source in the dense molecular core L1148. VeLLO natal cores show properties that are unusual for star-forming cores. The low luminosity...

متن کامل

Spectroscopically Peculiar Type Ia Supernovae and Implications for Progenitors

In a recent paper Li et al. (2000) reported that 36% of 45 Type Ia supernovae discovered since 1997 in two volume–limited supernova searches were spectroscopically peculiar, and they suggested that because this peculiarity rate is higher than that reported for an earlier non–volume–limited observational sample by Branch et al. (1993), it is now more likely that SNe Ia are produced by more than ...

متن کامل

Reverberation Mapping of High-Luminosity Quasars

1 Raymond and Beverly Sackler Faculty of Exact Sciences, School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv, Israel, Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA, United States, 3 Institute for Gravitation and the Cosmos, Pennsylvania State University, University Park, PA, United States, Department of Physics, Pennsylvania State Univer...

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: The Astrophysical Journal

سال: 2007

ISSN: 0004-637X,1538-4357

DOI: 10.1086/520085