A background galaxy in the field of the β Pictoris debris disk

被引：2

作者：

Regibo, S. ^{[1
]}

Vandenbussche, B. ^{[1
]}

Waelkens, C. ^{[1
]}

Acke, B. ^{[1
]}

Sibthorpe, B. ^{[2
]}

Nottebaere, M. ^{[1
]}

Voet, K. ^{[1
]}

Di Francesco, J. ^{[3
]}

Fridlund, M. ^{[4
]}

Gear, W. K. ^{[5
]}

Ivison, R. J. ^{[2
,6
]}

Olofsson, G. ^{[7
]}

机构：

[1] Katholieke Univ Leuven, Inst Sterrenkunde, B-3001 Louvain, Belgium

[2] Royal Observ, UK Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, Scotland

[3] Natl Res Council Canada, Herzberg Inst Astrophys, Victoria, BC V9E 2E7, Canada

[4] ESTEC SRE S, ESA Res & Sci Support Dept, NL-2201 AZ Noordwijk, Netherlands

[5] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales

[6] Univ Edinburgh, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland

[7] Stockholm Univ, AlbaNova Univ Ctr, Dept Astron, S-10691 Stockholm, Sweden

来源：

ASTRONOMY & ASTROPHYSICS | 2012年 / 541卷

关键词：

stars: early-type; stars: individual: beta Pictoris; planetary systems; techniques: image processing; MIDINFRARED IMAGES; SPIRE; PACS; MODELS;

D O I：

10.1051/0004-6361/201118631

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Herschel images in six photometric bands show the thermal emission of the debris disk surrounding beta Pic. In the three PACS bands at 70 mu m, 100 mu m and 160 mu m and in the 250 mu m SPIRE band, the disk is well-resolved, and additional photometry is available in the SPIRE bands at 350 mu m and 500 mu m, where the disk is only marginally resolved. The SPIRE maps reveal a blob to the southwest of beta Pic, coinciding with submillimetre detection of excess emission in the disk. We investigated the nature of this blob. Our comparison of the colours, spectral energy distribution and size of the blob, the disk and the background sources shows that the blob is most likely a background source with a redshift between z = 1.0 and z = 1.6.

引用

页数：7

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