Milli-arcsecond scale rotation measure in the CSS quasars 0548+165 and 1524-136

被引：17

作者：

Mantovani, F

Junor, W

Ricci, R

Saikia, DJ

Salter, C

Bondi, M

机构：

[1] CNR, Ist Radioastron, I-40126 Bologna, Italy

[2] Univ New Mexico, Albuquerque, NM 87131 USA

[3] Scuola Int Super Studi Avanzati, I-34014 Trieste, Italy

[4] TIFR, Natl Ctr Radio Astrophys, Pune 411007, Maharashtra, India

[5] Arecibo Observ, Arecibo, PR 00612 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2002年 / 389卷 / 01期

关键词：

techniques : interferometric; polarization; galaxies : individual : 0548+165; galaxies : individual : 1524-136;

D O I：

10.1051/0004-6361:20020482

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Two Compact Steep-spectrum Sources (CSSs), 0548+165 and 1524 136, chosen from a list of CSSs with polarization percentages that decrease with decreasing frequency and high rotation measure values (RM > 450 rad m(-2)) on arcsecond scales, were observed with the VLBA at 4.9 and 8.4 GHz. RM values up to approximate to 10(4) rad m(-2) were found in several regions along the jets in both sources. We suggest that a thin screen of magneto-ionic material with about 1 kpc thickness is responsible for these high RMs. The observed depolarization may be due to beam depolarization and/or inhomogeneities in the magnetic field.

引用

页码：58 / 67

页数：10

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