인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Context. The processes governing the production of astrophysical high-energy neutrinos are still a matter of debate, and the sources that originate them remain an open question. Among the putative emitters, active galactic nuclei (AGN) have gained increasing attention in recent years. Blazars, in particular, stand out due to their capability of accelerating particles in environments with external radiation fields. Recent observations suggest that they may play a role in the production of high-energy neutrinos detected by the IceCube observatory. Aims. We studied the physical properties of a subsample of 52 blazars, that have been proposed as candidate neutrino emitters, based on a positional cross-correlation statistical analysis between IceCube hotspots and the Fifth Edition of the Roma BZCat catalog. We provide a first characterization of their central engines and inner physical nature, which may help to explore the potential link with neutrino production. Methods. This study carries out an analysis of the optical spectroscopic properties of a sample of 52 candidate neutrino-emitter blazars, to infer their accretion regime. It is complemented by data at the radio and γ -ray frequencies, which carry the information about the intrinsic power of the relativistic jet. We compared the properties of the sample of candidate neutrino-emitter blazars to other blazar samples from the literature. To this end, we performed statistical tests and also explored, through simulations, the applicability of methods that include limits (censored data) on the quantities of our interest. Results. Overall, the sample of candidate neutrino-emitter blazars displays properties compatible with those of the reference samples. We observe a mild tendency to prefer objects with intense radiation fields (which are typical of radiatively efficient accretors), and high radio power, such as high-excitation radio galaxies (HERGs). Among the blazars in our sample, 24 are detected in γ -rays; they cover various ranges of γ -ray luminosities, compatible with the overall population. Additionally, we show that the statistical tests commonly used in the literature need to be used with caution, as they are highly sensitive to the amount of censored data and the sample size.
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
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