HK Lacertae
نویسندگان
چکیده
منابع مشابه
Directed HK propagator.
We offer a more formal justification for the successes of our recently communicated "directed Heller-Herman-Kluk-Kay" (DHK) time propagator by examining its performance in one-dimensional bound systems which exhibit at least quasi-periodic motion. DHK is distinguished by its single one-dimensional integral--a vast simplification over the usual 2N-dimensional integral in full Heller-Herman-Kluk-...
متن کاملPolarization and Variations of BL Lacertae Objects
BL Lacertae objects are an extreme subclass of AGNs showing rapid and large-amplitude variability, high and variable polarization, and core-dominated radio emissions. If a strong beaming effect is the cause of the extreme observation properties, one would expect that these properties would be correlated with each other. Based on the relativistic beaming model, relationships between the polariza...
متن کاملHighly Polarized Optically-selected Bl Lacertae Objects
Observations of candidate BL Lacertae objects spectroscopically selected from the Sloan Digital Sky Survey (SDSS) reveal a large fraction with high polarization (P > 3%). This result confirms that synchrotron radiation makes an important contribution to the observed optical continuum for most objects in the sample. The SDSS sample can be divided into separate categories, with objects of undeter...
متن کاملIs BL Lacertae an “orphan” AGN?*
Aims. We have analysed optical spectra of BL Lacertae, the prototype of its blazar subclass, to verify the broad Hα emission line detected more than a decade ago and its possible flux variation. We used the spectroscopic information to investigate the question of the BL Lacertae parent population. Methods. Lowand high-resolution optical spectra of BL Lacertae were acquired with the DOLORES spec...
متن کاملHidden BL Lacertae Objects Near and Far
I describe two difficulties with current research into the cosmic evolution of BL Lacertae Objects: (1). Possible sample incompleteness due to unrecognized (i.e., “hidden”) BL Lacs; and (2). The absence of a viable physical model of the evolution, to which current and future observations can be compared.
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1983
ISSN: 0252-9211
DOI: 10.1017/s025292110009638x