The first radioastronomical observation with photonic local oscillator

被引：28

作者：

Takano, S ^{[1
]}

Ueda, A

Yamamoto, T

Asayama, S

Sekimoto, Y

Noguchi, T

Ishiguro, M

Takara, H

Kawanishi, S

Ito, H

Hirata, A

Nagatsuma, T

机构：

[1] Nobeyama Radio Observ, Minamisa Ku, Nagano 3841305, Japan

[2] Grad Univ Adv Studies, Dept Astron Sci, Minamisa Ku, Nagano 3841305, Japan

[3] Natl Astron Observ, Mitaka, Tokyo 1818588, Japan

[4] NTT Corp, NTT Network Innovat Labs, Yokosuka, Kanagawa 2390847, Japan

[5] Osaka Prefecture Univ, Coll Integrated Arts & Sci, Sakai, Osaka 5998531, Japan

[6] NTT Corp, NTT Photon Labs, Atsugi, Kanagawa 2430198, Japan

[7] NTT Corp, NTT Microsyst Integrat Labs, Atsugi, Kanagawa 2430198, Japan

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2003年 / 55卷 / 04期

关键词：

instrumentation : miscellaneous; ISM : individual (W 51); ISM : molecules; radio lines : ISM;

D O I：

10.1093/pasj/55.4.L53

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of experimental radioastronomical observations of an interstellar molecular spectral line with an SIS (superconductor-insulator-superconductor) receiver pumped by a photonic local oscillator (LO). A millimeter-wave LO signal was generated by feeding an optical comb signal into a W-band (75-110 GHz) photomixer using a uni-traveling-carrier photodiode (UTC-PD). A CS J = 2-1 line at 98 GHz was observed toward a high-mass star-forming region W 51 (H2O). We compared the obtained spectra with those obtained with a conventional Gunn oscillator as an LO. As a result, the line parameters, such as the width, intensity, and frequency, were consistent with each other. The results presented here show that the photonic LO is a very promising source for heterodyne receivers in millimeter- and submillimeter-wave astronomy.

引用

页码：L53 / L56

页数：4

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