2006A&A...457..949M


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.03CET04:17:18

2006A&A...457..949M - Astronomy and Astrophysics, volume 457, 949-961 (2006/10-3)

Blue and yellow long-period variables in the direction of the Small Magellanic Cloud.

MENNICKENT R.E., CIDALE L., PIETRZYNSKI G., GIEREN W. and SABOGAL B.

Abstract (from CDS):

We investigate the nature of a sample of 17 long-term periodic variables in the direction of the Small Magellanic Cloud. Based on new spectroscopic data, we determined spectral types, radial velocities, absolute magnitudes, and colors for these stars. We present a refined discussion of their OGLE light curves along with an analysis of their 2MASS photometry. Most stars turned out to be B-A giants members of the Small Magellanic Cloud. We find a new interacting eclipsing binary with a period of 184 days and two new early-type ellipsoidal variables. One of our objects is the ROSAT source RXJ0058.2-7231. We analyzed 11-years of data for this Be X-ray binary finding that their photometric period varies by ∼4% quasiperiodically, on a time scale of ∼1200 days. We find evidence of multiple photometric periods in 2 Ae-type and 1 late-Be type stars. The case of OGLE00445466-7328029 is especially interesting, as this late-type Be star shows a beating phenomenon primarily caused by two closely-spaced frequencies, 0.05733c/d (17.44d) and 0.06347c/d (15.76d). Four other emission-line objects show stable long-term periodicities and probably correspond to Be-star binaries. Transient photometric periods are only found in 4 non-emission early-type stars.

Abstract Copyright:

Journal keyword(s): stars: binaries: general - stars: binaries: eclipsing - stars: early type - stars: emission-line, Be - stars: circumstellar matter - stars: mass-loss

Nomenclature: Table 1, col(2): [MCP2006] SMC3-NN N=17 among (Nos 1-21).

Simbad objects: 24

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Number of rows : 24

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 LHA 115-S 3 Em* 00 43 36.90 -73 26 38.3 14.26 14.39 14.09   13.73 A7-F5Ie 14 0
2 NGC 242 OpC 00 43 37.57 -73 26 37.9   12.1       ~ 36 1
3 OGLE SMC-T2CEP-10 WV* 00 44 54.6519527997 -73 28 03.222272618 14.88 15.13 14.75   14.16 B7-9IIIe 11 0
4 OGLE J004554.14-731404.3 Be? 00 45 54.0709354642 -73 14 04.932867165 16.33 16.04 15.41   14.73 F0Ib-II 6 0
5 LIN 81 EB* 00 46 33.7451367568 -73 12 04.703471997 14.18 14.21 13.95   13.62 F5Ie+G0I 13 0
6 OGLE J004750.14-731316.4 Be? 00 47 50.13 -73 13 16.9 15.91 15.64 15.32   14.97 B7-8III 6 0
7 OGLE J004921.41-725844.9 Be? 00 49 21.41 -72 58 44.9   14.934 14.614   14.11 A5II 6 0
8 OGLE J005025.64-725807.1 Be? 00 50 25.6761993390 -72 58 07.431255483 14.48 14.29 13.86   13.56 F4IV 6 0
9 LIN 160 WR* 00 50 43.43 -73 27 05.7 12.363 13.304 13.426   13.55 WN6 46 0
10 LIN 166 Em* 00 51 00.17 -72 53 04.2 12.55 13.55 13.56   13.52 B1II-IIIe 28 0
11 OGLE J005107.59-732636.6 Be? 00 51 07.6504457196 -73 26 37.237592813   15.061 15.046   15.073 ~ 4 0
12 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9702 1
13 OGLE J005359.22-723508.9 Be? 00 53 59.2178298654 -72 35 09.288899458 14.26 14.55 14.38   14.13 A3III 7 0
14 [MA93] 836 Em* 00 55 20.2841981197 -72 37 10.349572472 14.51 14.91 14.84   14.44 A0Ibe 10 0
15 AzV 194 Be? 00 57 45.2671007042 -72 35 32.560123911 12.66 13.677 13.823   13.94 B1III 12 0
16 RX J0058.2-7231 HXB 00 58 12.5870706987 -72 30 48.761117528 13.91 14.98 14.87   14.62 B0IIIe 58 0
17 LIN 363 Em* 01 00 00.79 -72 55 22.8 13.90 14.42 14.33   13.99 B8-9IIIe 16 0
18 LHA 115-S 42 Em* 01 04 51.2531568636 -72 46 47.168439687 12.45 13.35 13.376 13.39 13.29 B1Ib-IIe 17 0
19 AzV 364 Em* 01 04 53.0177138799 -71 59 19.090940285 12.99 14.06 14.21   14.37 B2IIIe 13 0
20 HD 16523 WR* 02 41 11.6752293070 +56 43 49.735743590 10.03 10.34 9.99     WC6 126 0
21 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15205 1
22 L 595-22 PM* 05 56 24.7419816722 -27 51 32.362978169   12.31 12.38     sdG 147 0
23 V* RX UMa LP* 09 14 25.3474493086 +67 15 38.297649293   11.78 10.34     M5 14 0
24 RX J1856.6-3754 N* 18 56 35.11 -37 54 30.5     25.7     ~ 391 0

    Equat.    Gal    SGal    Ecl

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2021.03.03-04:17:18

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