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Time-resolved photometry of the nova remnants DM Gem, CP Lac, GI Mon, V400 Per, CT Ser and XX Tau

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Rodríguez-Gil, P. and Torres, M. A. P.. (2005) Time-resolved photometry of the nova remnants DM Gem, CP Lac, GI Mon, V400 Per, CT Ser and XX Tau. Astronomy & Astrophysics, Vol.431 (No.1). pp. 289-296. ISSN 0004-6361

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Official URL: http://dx.doi.org/10.1051/0004-6361:20041112

Abstract

We present the first results of a photometric survey of poorly studied nova remnants in the Northern Hemisphere.
The main results are as follows: DM Gem shows a modulation at 0.123 d (probably linked to the orbit) and rapid variations at ∼22 min. A moderate resolution spectrum taken at the time of the photometric observations shows intense He II λ4686 and Bowen emission, characteristic of an intermediate polar or a SW Sex star. Variability at 0.127 d and intense flickering (or quasi-periodic oscillations) are the main features of the light curve of CP Lac. A 0.1-mag dip lasting for ∼45 min is observed in GI Mon, which could be an eclipse. A clear modulation (probably related to the orbital motion) either at 0.179 d or 0.152 d
is observed in the B-band light curve of V400 Per. The results for CT Ser point to an orbital period close to 0.16 d. Intense flickering is also characteristic of this old nova. Finally, XX Tau shows a possible periodic signal near 0.14 d and displays fast variability at ∼24 min. Its brightness seems to be modulated at ∼5 d. We relate this long periodicity to the motion of an eccentric/tilted accretion disc in the binary.

Item Type:

Journal Article

Subjects:

Q Science > QB Astronomy

Divisions:

Faculty of Science > Physics

Library of Congress Subject Headings (LCSH):

Stars, New

Journal or Publication Title:

Astronomy & Astrophysics

Publisher:

EDP Sciences

ISSN:

0004-6361

Official Date:

February 2005

Dates:

Date	Event
February 2005	Published

Volume:

Vol.431

Number:

No.1

Page Range:

pp. 289-296

Identification Number:

10.1051/0004-6361:20041112

Status:

Peer Reviewed

Access rights to Published version:

Open Access

Funder:

Particle Physics and Astronomy Research Council (Great Britain) (PPARC), United States. National Aeronautics and Space Administration (NASA)

Grant number:

NAG5-9930 (NASA)

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