2010AJ....139.1527X


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.21CEST08:48:56

2010AJ....139.1527X - Astron. J., 139, 1527-1533 (2010/April-0)

Long-term light curve of highly variable protostellar star GM Cep.

XIAO L., KROLL P. and HENDEN A.A.

Abstract (from CDS):

We present data from the archival plates at Harvard College Observatory and Sonneberg Observatory showing the field of the solar-type pre-main-sequence star GM Cep. A total of 186 magnitudes of GM Cep have been measured on these archival plates, with 176 in blue sensitivity, six in visible, and four in red. We combine our data with data from the literature and from the American Association of Variable Star Observers to depict the long-term light curves of GM Cep in both B and V wavelengths. The light curves span from 1895 until now, with two densely sampled regions (1935-1945 in the B band, and 2006 until now in the V band). The long-term light curves do not show any fast rise behavior as predicted by an accretion mechanism. Both the light curves and the magnitude histograms confirm the conclusion that the light curves are dominated by dips (possibly from extinction) superposed on some quiescence state, instead of outbursts caused by accretion flares. Our result excludes the possibility of GM Cep being a FUor, EXor, or McNeil's Nebula-type star. Several special cases of T Tauri stars were checked, but none of these light curves were compatible with that of GM Cep. The lack of periodicity in the light curve excludes the possibility of GM Cep being a KH 15D system.

Abstract Copyright:

Journal keyword(s): stars: variables: general

CDS comments: Table 1: Comparison stars are not in SIMBAD.

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 V* CW Tau TT* 04 14 17.0041128798 +28 10 57.765657757 13.92 13.64 12.36 12.86   K0Ve 308 0
2 V* RW Aur TT* 05 07 49.538 +30 24 05.07   10.86 9.60 9.95   K1/5e+K5e 694 0
3 V* QZ Aur No* 05 28 34.0777158013 +33 18 21.777186372           ~ 49 0
4 V* GW Ori TT* 05 29 08.3925564419 +11 52 12.653756566   10.83 10.10 9.52   G5/8Ve 292 2
5 NAME McNeil Nebula RNe 05 46 14 -00 05.8           ~ 69 2
6 V* V582 Mon Or* 06 41 10.31 +09 28 33.2   17.404   17.21 16.45 K5 156 0
7 * P Cyg s*b 20 17 47.2020844 +38 01 58.552724 4.66 5.24 4.82 4.28 4.02 B1-2Ia-0ep 1125 1
8 V* GM Cep Or* 21 38 17.3264000611 +57 31 22.011853856 15.016 16.40 13.146 12.090 11.117 F9 35 0
9 IC 1396 OpC 21 39 00 +57 29.4           ~ 438 1

    Equat.    Gal    SGal    Ecl

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2019.10.21-08:48:56

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