Letter to the Editor

The infrared properties of the new outburst star IRAS 05436–0007 in quiescent phase

¹ Konkoly Observatory of the Hungarian Academy of Sciences, PO Box 67, 1525 Budapest, Hungary
² Department of Astronomy, Eötvös Loránd University, PO Box 32, 1518 Budapest, Hungary
³ Center for Astrophysics & Space Astronomy, University of Colorado at Boulder, 389 UCB, Boulder, CO 80309-0389, USA

Corresponding author: P. Ábrahám, abraham@konkoly.hu

Received: 12 March 2004
Accepted: 10 April 2004

Abstract

We compiled and investigated the infrared/sub-mm/mm SED of the new outburst star IRAS 05436-0007 in quiescent phase. The star is a flat-spectrum source, with an estimated total luminosity of , typical of low-mass T Tauri stars. The derived circumstellar mass of is rather high among low-mass YSOs. The observed SED differs from the SEDs of typical T Tauri stars and of 4 well-known EXors, and resembles more the SEDs of FU Orionis objects indicating the presence of a circumstellar envelope. IRAS 05436-0007 seems to be a class II source with an age of approximately 4  10⁵ yr. In this evolutionary stage an accretion disk is already fully developed, though a circumstellar envelope may also be present. Observations of the present outburst will provide additional knowledge on the source.