Results 131 to 140 of about 18,958 (240)

The nature of X-ray absorbed starburst QSOs and the QSO evolutionary scheme

, 2005
Peer ...
Page, Matt, Carrera, Francisco J., Ebrero, Jacobo, Stevens, J. A., Ivison, R. J.   +4 more
openaire   +3 more sources

The Growth of Black Holes and Their Host Spheroids in (Sub)mm-loud QSOs at High Redshift

, 2007
We study the growth of black holes and stellar population in spheroids at high redshift using several (sub)mm-loud QSO samples. Applying the same criteria established in an earlier work, we find that, similar to IR QSOs at low redshift, the far-infrared ...
Adams F C, Alexander D M, Borys C, Burkert A, Cai-Na Hao, Carilli C L, Carilli C L, Carilli C L, Chapman S C, Conselice C J, Downes D, Fan X, Ferrarese L, Hao C N, Heckman T M, Hong Wu, Kim D-C, Kormendy J, Laor A, Magorrian J, Martin D C, Momjian E, Omont A, Page M J, Shields G A, Shields G A, Shu-De Mao, Silk J, Smail I, Staguhn J G, Stern D, Tacconi L J, Tremaine S, Treu T, Vestergaard M, Walter F, Xiao-Yang Xia, Zheng X Z, Zu-Gan Deng   +38 more
core   +2 more sources

What are recent observations telling us in light of improved tests of distance duality relation?

Physics Letters B, 2023
As an exact result required by the Etherington reciprocity theorem, the cosmic distance duality relation (CDDR), η(z)=DL(z)(1+z)−2/DA(z)=1 plays an essential part in modern cosmology.
Tonghua Liu, Shuo Cao, Shuai Ma, Yuting Liu, Chenfa Zheng, Jieci Wang   +5 more
doaj  

A Cosmological Interpretation of the Absorption-Line Spectra of QSO [PDF]

, 1968
I. S. Šklovskij
openalex   +1 more source

The Optical Polarization of Near-Infrared Selected QSOs

, 2001
Optical broad-band polarimetry is presented for near-infrared color-selected AGN classified QSOs based on their K-band luminosity. More than 10% of a sample of 70 QSOs discovered in the Two Micron All Sky Survey (2MASS) with J-K > 2 and M_K 3%), and ...
Cutri, R. M., Hines, D. C., Nelson, B. O., Schmidt, G. D., Smith, P. S.   +4 more
core   +1 more source

Bioinformation and Neutrino Communication. [PDF]

Bioinformation, 2022
Shapshak P.
europepmc   +1 more source

Spectroscopic Observations of Eight QSO Candidates among Markarian Objects [PDF]

, 1974
D. Wills, Beverley J. Wills
openalex   +1 more source

Spectroscopic Properties of QSOs Selected from Ultraluminous Infrared Galaxy Samples

, 2002
We performed spectroscopic observations for a large infrared QSO sample with a total of 25 objects. The sample was compiled from the QDOT redshift survey, the 1 Jy ULIRGs survey and a sample obtained by a cross-correlation study of the IRAS Point Source ...
Baker J. C., Boller Th., Boller Th., Christopoulou P. E., Clements D. L., H. Wu, Joly M., Lawrence A., S. Mao, Voges W., Wang T., X. Y. Xia, X. Z. Zheng, Xia X. Y., Z. G. Deng, Zheng Z.   +15 more
core   +1 more source

Low Redshift Qso Environments

, 2016
Extensive QSO surveys carried out by SDSS have provided a very large sample of quasars both at low and high redshift. For low z objects it is possible to investigate their host galaxies and environments using directly the SDSS imagesWe have undertaken an extensive multiwavelength study of the a sample of about 400 quasars at z < 0.5 in order to ...
Jari Kotilainen, Renato Falomo, K. Karhunen, Daniela Bettoni   +3 more
openaire   +4 more sources

Near-IR spectroscopy of luminous LoBAL quasars at 1

, 2017
We present near-IR spectroscopy of 22 luminous low-ionization broad absorption line quasars (LoBAL QSOs) at redshift 1 ...
Izumiura, Hideyuki, Kotilainen, Jari, Nagao, Tohru, Reynolds, Thomas, Schramm, Malte, Schulze, Andreas, Terao, Koki, Urrutia, Tanya, Wu, Xue-Bing, Zuo, Wenwen   +9 more
core   +2 more sources