KaVA ESTEMA project

[摘要] The ESTEMA (Expanded Study on Stellar Masers) project is one of three Large Programs of the KaVA (the combined array of the Korean VLBI Network and Japanese VLBI Exploration of Radio Astrometry), and conducted in 2015-2016. It aims to publish a database of the largest sample of VLBI images of circumstellar water (H2O) and silicon-monoxide (SiO) maser sources towards circumstellar envelopes (CSEs) of 80 evolved stars in late AGB to early post-AGB phase. Here we present the specifications of the ESTEMA observations and the planned scientific goals in order to share the basic information of the ESTEMA with astronomical community and encourage future collaborations with the ESTEMA and future follow-up observations for the targeted stars.

[发布机构] Kagoshima University, 1-21-35 Korimoto, Kagoshima; 890-0065, Japan^1;Korean VLBI Network, Korea Astronomy and Space Science Institute, Daedeokdae-ro, 776, Yuseong-gu, Daejeon; 305-348, Korea, Republic of^2;Chile Observatory, National Astronomical Observatory of Japan, Calle Joaquin Montero 3000, Oficina 702, Vitacura, Santiago, Chile^3;Mizusawa VLBI Observatory, National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo; 181-8588, Japan^4;Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul; 151-742, Korea, Republic of^5;University of Western Australia, 35 Stirling Hwy, Crawley; WA; 6009, Australia^6;University of Nigeria, Carver Building, 1 University Road, Nsukka, Nigeria^7;Ural Federal University, Lenin Avenue 51, Ekaterinburg; 620000, Russia^8

[效力级别] 天文学 [学科分类] 天文学(综合)

[关键词] Astronomical community;Circumstellar;Circumstellar envelopes;Evolved stars;Follow up;Large programs;Post-AGB;Silicon monoxide