Imaging the molecular outflows of the prototypical ULIRG NGC 6240 with ALMA

被引：19

作者：

Saito, T. ^{[1
,2
]}

Iono, D. ^{[1
,3
]}

Ueda, J. ^{[4
]}

Espada, D. ^{[1
,3
]}

Sliwa, K. ^{[2
]}

Nakanishi, K. ^{[1
,3
]}

Lu, N. ^{[5
,6
]}

Xu, C. K. ^{[5
,6
]}

Michiyama, T. ^{[1
,3
]}

Kaneko, H. ^{[1
,7
]}

Yamashita, T. ^{[8
]}

Ando, M. ^{[1
,3
]}

Yun, M. S. ^{[9
]}

Motohara, K. ^{[10
]}

Kawabe, R. ^{[1
,3
]}

机构：

[1] Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[2] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[3] Grad Univ Adv Studies SOKENDAI, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[4] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[5] Chinese Acad Sci, Natl Astron Observ China, Beijing 100012, Peoples R China

[6] Chinese Acad Sci, China Chile Joint Ctr Astron, Santiago 1515, Chile

[7] Natl Astron Observ Japan, Nobeyama Radio Observ, Minamisa Ku, Nagano 3841305, Japan

[8] Ehime Univ, Res Ctr Space & Cosm Evolut, 2-5 Bunkyo Cho, Matsuyama, Ehime 7908577, Japan

[9] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA

[10] Univ Tokyo, Inst Astron, 2-21-1 Osawa, Mitaka, Tokyo 1810015, Japan

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2018年 / 475卷 / 01期

基金：

国家重点研发计划;

关键词：

galaxies: active; galaxies: evolution; galaxies: individual: NGC 6240; galaxies: interactions; ULTRALUMINOUS INFRARED GALAXY; BLACK-HOLES; NGC-6240; RADIO; WARM; GAS; EMISSION; FEEDBACK; NUCLEUS; MERGERS;

D O I：

10.1093/mnrasl/slx207

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present 0.97 x 0.53 arcsec(2) (470 pc x 250 pc) resolution CO (J = 2-1) observations towards the nearby luminous merging galaxy NGC 6240 with the Atacama Large Millimeter/ submillimeter Array. We confirmed a strong CO concentration within the central 700 pc, which peaks between the double nuclei, surrounded by extended CO features along the optical dust lanes (similar to 11 kpc). We found that the CO emission around the central, a few kpc, has extremely broad velocity wings with full width at zero intensity similar to 2000 km s(-1), suggesting a possible signature of molecular outflow(s). In order to extract and visualize the high-velocity components in NGC 6240, we performed a multiple Gaussian fit to the CO data cube. The distribution of the broad CO components shows four extremely large line width regions (similar to 1000 km s(-1)) located 1-2 kpc away from both nuclei. Spatial coincidence of the large line width regions with H alpha, near-IR H-2, and X-ray suggests that the broad CO (2-1) components are associated with nuclear outflows launched from the double nuclei.

引用

页码：L52 / L56

页数：5

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