Buscar

Estamos realizando la búsqueda. Por favor, espere...

 Detalle_Publicacion

X-ray-selected broad absorption line quasi-stellar objects

Abstract: We study a sample of six X-ray-selected broad absorption line (BAL) quasi-stellar objects (QSOs) from the XMM-NewtonWide Angle Survey.All six objects are classified as BALQSOs using the classic balnicity index, and together they form the largest sample of X-ray-selected BALQSOs.We find evidence for absorption in the X-ray spectra of all six objects. An ionized absorption model applied to an X-ray spectral shape that would be typical for non-BAL QSOs (a power law with energy index ? = 0.98) provides acceptable fits to the X-ray spectra of all six objects. The optical to X-ray spectral indices, ?OX, of the X-ray-selected BALQSOs, have a mean value of ??OX? = 1.69 ± 0.05, which is similar to that found for X-ray-selected and optically selected non-BAL QSOs of a similar ultraviolet luminosity. In contrast, optically selected BALQSOs typically have much larger ?OX and so are characterized as being X-ray weak. The results imply that X-ray selection yields intrinsically X-ray bright BALQSOs, but their X-ray spectra are absorbed by a similar degree to that seen in optically selected BALQSO samples; X-ray absorption appears to be ubiquitous in BALQSOs, but X-ray weakness is not. We argue that BALQSOs sit at one end of a spectrum of X-ray absorption properties in QSOs related to the degree of ultraviolet absorption in C IV 1550 Å.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: MNRAS 464, 4586?4592 (2017)

Editorial: Oxford University Press

 Año de publicación: 2017

Nº de páginas: 7

Tipo de publicación: Artículo de Revista

 DOI: 10.1093/mnras/stw2560

ISSN: 0035-8711,1365-2966

 Proyecto español: AYA2009-08059 ; AYA2015-64346-C2-1-P

Url de la publicación: https://doi.org/10.1093/mnras/stw2560

Autoría

EBRERO, JACOBO

ESQUEJ ALONSO, MARÍA PILAR

KRUMPE, MIRKO

SILVIA MATEOS IBAÑEZ

ROSEN, SIMON R.

SCHWOPE, AXEL D.

STREBLYANSKA, ALINA

SYMEONIDIS, MYRTO

TEDDS, JONATHAN A.

WATSON, MIKE G.