EDP Sciences
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Volume 370, Number 2, May I 2001
Page(s) 503 - 506
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20010256

A&A 370, 503-506 (2001)
DOI: 10.1051/0004-6361:20010256

Symbiotic stars on Asiago archive plates

U. Munari1, R. Jurdana-Sepic2 and D. Moro1

1  Osservatorio Astronomico di Padova, Sede di Asiago, 36012 Asiago (VI), Italy
2  Physics Department, University of Rijeka, Omladinska 14, HR-51000 Rijeka, Croatia

(Received 6 February 2001 / Accepted 14 February 2001 )

The rich plate archive of the Asiago observatory has been searched for plates containing the symbiotic stars AS 323, Ap 3-1, CM Aql, V1413 Aql (= AS 338), V443 Her, V627 Cas (= AS 501) and V919 Sgr. The program objects were found on 602 plates, where their brightness has been estimated against the ${UBV(RI)_{\rm C}}$ photometric sequences calibrated by Henden & Munari (2000). AS 323 is probably eclipsing, with a preliminary P=197.6 day period. If confirmed, it would be the shortest orbital period known among symbiotic stars. CM Aql does not seem to undergo a series of outbursts, its lightcurve being instead modulated by a large amplitude sinusoidal variation with a $P\sim 1058$ day period. V627 Cas presents a secular trend, in agreement with the possible post-AGB nature of its cool component.

Key words: binaries: symbiotic

Offprint request: U. Munari, munari@astras.pd.astro.it

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