论文标题
第一个短的GRB毫米余辉：极具活力的SGRB 211106A的宽角射流
The First Short GRB Millimeter Afterglow: The Wide-Angled Jet of the Extremely Energetic SGRB 211106A
论文作者
论文摘要
我们介绍了第一个毫米余辉的余辉，即短期$γ$ -Ray爆发（SGRB），以及第一个确认的余辉，是鸟粪系统在Swift上定位的SGRB。我们的Atacama大毫米/亚毫米阵列（ALMA）检测SGRB 211106A在Hubble Space望远镜（HST）成像中检测到的微弱宿主星系中建立了一个起源，以$ 0.7 \ Lessim Z \ Lessim Z \ Lessim Z \ Lesssimsim1.4 $。由于缺乏可检测到的光学余辉，再加上明亮的毫米对应物，我们推断出高度灭绝，$ a _ {\ rm V} \ gtrsim2.6 $ mag沿视线，这使得这是已知的最尘埃灭绝的SGRB之一。毫米波带曲线捕获了同步峰从余波前震中的通过，并在$ t _ {\ rm jet} = 29.2^{+4.5} _ { - 4.0} $〜天处揭示了喷气间断。对于假定的$ z = 1 $的红移，我们推断出一个开头的角度，$θ_ {\ rm jet} =（15.5 \ pm1.4）$〜度，以及$ \ log的光束校正的动能（e _ {e _ {\ rm k}/{\ rm k}/{\ rm erg eRG}迄今为止已知的SGRB喷气机。将所有已发表的毫米波段上限与大量SGRB样本结合在一起，我们发现高密度环境中的能量流出更可能具有可检测到的毫米计。 Concerted afterglow searches with ALMA should yield detection fractions of 24-40% on timescales of $\gtrsim2$~days at rates $\approx0.8$-1.6 per year, outpacing the historical discovery rate of SGRB centimeter-band afterglows.
We present the discovery of the first millimeter afterglow of a short-duration $γ$-ray burst (SGRB) and the first confirmed afterglow of an SGRB localized by the GUANO system on Swift. Our Atacama Large Millimeter/Sub-millimeter Array (ALMA) detection of SGRB 211106A establishes an origin in a faint host galaxy detected in Hubble Space Telescope (HST) imaging at $0.7\lesssim z\lesssim1.4$. From the lack of a detectable optical afterglow, coupled with the bright millimeter counterpart, we infer a high extinction, $A_{\rm V}\gtrsim2.6$ mag along the line of sight, making this the one of the most highly dust-extincted SGRBs known to date. The millimeter-band light curve captures the passage of the synchrotron peak from the afterglow forward shock and reveals a jet break at $t_{\rm jet}=29.2^{+4.5}_{-4.0}$~days. For a presumed redshift of $z=1$, we infer an opening angle, $θ_{\rm jet}=(15.5\pm1.4)$~degrees, and beaming-corrected kinetic energy of $\log(E_{\rm K}/{\rm erg})=51.8\pm0.3$, making this one of the widest and most energetic SGRB jets known to date. Combining all published millimeter-band upper limits in conjunction with the energetics for a large sample of SGRBs, we find that energetic outflows in high density environments are more likely to have detectable millimeter counterparts. Concerted afterglow searches with ALMA should yield detection fractions of 24-40% on timescales of $\gtrsim2$~days at rates $\approx0.8$-1.6 per year, outpacing the historical discovery rate of SGRB centimeter-band afterglows.
