Search for intrinsic NALs in BAL/mini-BAL quasar spectra

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

An Optical Time-Delay for the Lensed BAL Quasar

We present optical V and i-band light curves of the gravitationally lensed BAL quasar HE 2149−2745. The data, obtained with the 1.5m Danish Telescope (ESO-La Silla) between October 1998 and December 2000, are the first from a long-term project aimed at monitoring selected lensed quasars in the Southern Hemisphere. A time delay of 103±12 days is determined from the light curves. In addition, VLT...

متن کامل

the search for the self in becketts theatre: waiting for godot and endgame

this thesis is based upon the works of samuel beckett. one of the greatest writers of contemporary literature. here, i have tried to focus on one of the main themes in becketts works: the search for the real "me" or the real self, which is not only a problem to be solved for beckett man but also for each of us. i have tried to show becketts techniques in approaching this unattainable goal, base...

15 صفحه اول

Unusual high - redshift radio BAL quasar 1624 + 3758

We present observations of the most radio-luminous BAL quasar known, 1624+3758, at redshift z = 3.377. The quasar has several unusual properties: (1) The FeII UV191 1787-˚ A emission line is very prominent. (2) The BAL trough (BALnicity index 2990 kms −1) is detached by 21000 kms −1 and extends to velocity v =-29000 kms −1. There are additional intrinsic absorbers at-1900 and-2800 kms −1. (3) T...

متن کامل

An unusual iron Lo-BAL quasar detected by ISOCAM

We report the discovery of an unusual low–ionization broad absorption line quasar at z = 1.776 which exhibits absorption lines from many excited states of Fe ii. This member of the rare class of ’FeLoBAL’ quasars was serendipitously found in a mid–infrared (MIR) survey of distant clusters carried out with the ISOCAM camera. ISO J005645.1−273816 has a high MIR to UV luminosity ratio, suggesting ...

متن کامل

Probing Reionization with Quasar Spectra: the Impact of the Intrinsic Lyman-α Emission Line Shape Uncertainty

Arguably the best hope of understanding the tail end of the reionization of the intergalactic medium (IGM) at redshift z > 6 is through the detection and characterization of the Gunn-Peterson (GP) damping wing absorption of the IGM in bright quasar spectra. However, the use of quasar spectra to measure the IGM damping wing requires a model of the quasar’s intrinsic Lyman-α emission line. Here w...

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: Monthly Notices of the Royal Astronomical Society

سال: 2020

ISSN: 0035-8711,1365-2966

DOI: 10.1093/mnras/staa2793