MOJAVE 项目完备耀变体样本的伽马射线与秒差距尺度喷流性质
宇宙学与河外天体物理
2019-08-15 v2 高能天体物理现象
摘要
我们研究了费米任务前 11 个月（2008 年 8 月 4 日至 2009 年 7 月 5 日）期间，一个伽马射线与射电联合选出的活动星系核样本的费米 LAT 伽马射线和 15 GHz VLBA 射电性质。该样本包含此期间赤纬高于 -30 度、在这两个波段最亮的 173 个活动星系核，因此探测了明亮耀变体群体中伽马射线响度（伽马射线与射电波段光度比）的完整范围。后者跨越至少四个数量级，反映了明亮耀变体群体中能谱能量分布参数的广泛范围。然而，蝎虎天体显示出伽马射线响度随同步辐射能谱能量分布峰值频率增加的线性相关性，暗示该类天体具有普适的能谱能量分布形状。对于这些蝎虎天体的伽马射线发射，同步辐射自康普顿模型优于外部种子光子模型，因为后者预测康普顿主导性依赖于多普勒因子，这将破坏任何观测到的同步辐射能谱能量分布峰值与伽马射线响度之间的相关性。高同步峰蝎虎天体的特征是其射电核亮温度低于平均水平，且无一显示出大的射电调制指数或高的线偏振核偏振度。在我们样本中的平谱射电类星体中未观察到等效趋势。鉴于这些性质与相对论性集束效应的关联，我们认为高同步峰蝎虎天体的多普勒因子普遍低于样本中低同步峰蝎虎天体或平谱射电类星体。
引用
@article{arxiv.1107.4977,
title = {Gamma-Ray and Parsec-Scale Jet Properties of a Complete Sample of Blazars From the MOJAVE Program},
author = {M. L. Lister and M. Aller and H. Aller and T. Hovatta and K. I. Kellermann and Y. Y. Kovalev and E. T. Meyer and A. B. Pushkarev and E. Ros and M. Ackermann and E. Antolini and L. Baldini and J. Ballet and G. Barbiellini and D. Bastieri and K. Bechtol and R. Bellazzini and B. Berenji and R. D. Blandford and E. D. Bloom and M. Boeck and E. Bonamente and A. W. Borgland and J. Bregeon and M. Brigida and P. Bruel and R. Buehler and S. Buson and G. A. Caliandro and R. A. Cameron and P. A. Caraveo and J. M. Casandjian and E. Cavazzuti and C. Cecchi and C. S. Chang and E. Charles and A. Chekhtman and C. C. Cheung and J. Chiang and S. Ciprini and R. Claus and J. Cohen-Tanugi and J. Conrad and S. Cutini and F. de Palma and C. D. Dermer and E. do Couto e Silva and P. S. Drell and A. Drlica-Wagner and C. Favuzzi and S. J. Fegan and E. C. Ferrara and J. Finke and W. B. Focke and P. Fortin and Y. Fukazawa and P. Fusco and F. Gargano and D. Gasparrini and N. Gehrels and S. Germani and N. Giglietto and F. Giordano and M. Giroletti and T. Glanzman and G. Godfrey and I. A. Grenier and S. Guiriec and D. Hadasch and M. Hayashida and E. Hays and D. Horan and R. E. Hughes and G. Jóhannesson and A. S. Johnson and M. Kadler and H. Katagiri and J. Kataoka and J. Knödlseder and M. Kuss and J. Lande and F. Longo and F. Loparco and B. Lott and M. N. Lovellette and P. Lubrano and G. M. Madejski and M. N. Mazziotta and W. McConville and J. E. McEnery and J. Mehault and P. F. Michelson and T. Mizuno and C. Monte and M. E. Monzani and A. Morselli and I. V. Moskalenko and S. Murgia and M. Naumann-Godo and S. Nishino and P. L. Nolan and J. P. Norris and E. Nuss and M. Ohno and T. Ohsugi and A. Okumura and N. Omodei and E. Orlando and M. Ozaki and D. Paneque and D. Parent and M. Pesce-Rollins and M. Pierbattista and F. Piron and G. Pivato and S. Rainò and A. Readhead and A. Reimer and O. Reimer and J. L. Richards and S. Ritz and H. F. -W. Sadrozinski and C. Sgrò and M. S. Shaw and E. J. Siskind and G. Spandre and P. Spinelli and H. Takahashi and T. Tanaka and J. G. Thayer and J. B. Thayer and D. J. Thompson and G. Tosti and A. Tramacere and E. Troja and T. L. Usher and J. Vandenbroucke and V. Vasileiou and G. Vianello and V. Vitale and A. P. Waite and P. Wang and B. L. Winer and K. S. Wood and S. Zimmer},
journal= {arXiv preprint arXiv:1107.4977},
year = {2019}
}
备注
22 pages, 11 figures, 4 tables; accepted for publication in the Astrophysical Journal