1998A&A...330..169D

Query : 1998A&A...330..169D

1998A&A...330..169D - Astronomy and Astrophysics, volume 330169-174 (1998/2-1)

Detection of short-term variations in Mira-type variables from Hipparcos photometry.

DE LAVERNY P., MENNESSIER M.O., MIGNARD F. and MATTEI J.A.

Abstract (from CDS):

The Hipparcos photometric observations carried out over 37 months have been investigated in detail for ∼250 Miras. This leads to an unexpected by-product of the mission that we already suspected from ESOC real-time reductions: the first detection from space of photometric short-term brightness variations in Mira-type variables. Altogether, 51 events in 39 M-type Miras are detected and no similar variations are found for S and C-type Miras. Their amplitude ranges from 0.23 mag up to 1.11 mag and their duration extends from 2 hours up to almost 6 days. These events seem to occur preferentially in late spectral types. We suggest that they might be related to molecular opacity effects.

Abstract Copyright: ∼

Journal keyword(s): stars: variables - stars: late-type - stars: AGB and post-AGB

Simbad objects: 42

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Number of rows : 42
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* SV And Mi* 00 04 20.0747373144 +40 06 35.834145228   11.78 11.53 8.67   M5-7e 88 0
2 V* RU Oct Mi* 00 08 46.1704825824 -86 11 18.582437436   13.49 12.22     ~ 32 0
3 V* RY Hyi Mi* 01 33 34.0473215952 -75 12 27.091773396   12.81 11.27 11.81 9.23 M5e 25 0
4 V* R Cet Mi* 02 26 02.3168041392 -00 10 41.813680476   10.5 7.20     M4-5e 148 0
5 V* T Hor Mi* 03 00 52.1203301208 -50 38 31.886250072 11.19 10.14 8.69 8.90   M2/3e 73 0
6 V* T Eri Mi* 03 55 13.9008848232 -24 01 56.570029104   10.50 7.20     M5/6IIIe 87 0
7 V* R Cae Mi* 04 40 30.0847911768 -38 14 06.929226636   11.1 6.70     M6e 101 0
8 V* S Pic Mi* 05 10 57.2451886368 -48 30 25.453894284   10.46 6.50 9.45   M7e 94 0
9 V* R Aur Mi* 05 17 17.6915798904 +53 35 10.031931312   10.82 10.04 6.12   M6.5-8.5e 240 0
10 V* R Oct Mi* 05 26 06.1935907128 -86 23 17.758587372   10.23 6.40     M5.5e 95 0
11 V* S Col Mi* 05 46 56.3085067296 -31 41 28.366804824   11.98 11.01     M8 76 0
12 V* V Mon S* 06 22 43.5821819376 -02 11 43.500924636 9.03 8.26 6.87 6.41   M5-8Se 139 0
13 V* RX Mon Mi* 07 29 21.3161773320 -04 16 43.707140796     10.2     M9 34 0
14 V* Z Pup Mi* 07 32 38.0640798624 -20 39 29.219695524   12.48 7.20 9.23   M4e 156 0
15 V* T Hya Mi* 08 55 39.8442225576 -09 08 29.353573068   12.10 10.57 10.66   M4-7.5:e 95 0
16 V* X Hya Mi* 09 35 30.2667472344 -14 41 28.610073456   10.02 7.20 9.24   M7-8+e 159 0
17 V* X Ant Mi* 10 06 42.2438265936 -30 04 37.957616040   11.39 9.88 10.61   M2 37 0
18 V* W Vel Mi* 10 15 14.8298044200 -54 28 41.989481076   12.23 8.30     M9 82 0
19 V* WX Vel Mi* 10 48 59.8490246496 -54 10 54.344040204   12.83 11.88     M7IIIe 35 0
20 V* WW Vel Mi* 10 50 23.9081524992 -48 40 24.358147356   12.54 11.35     M5e 26 0
21 V* CI Vel Mi* 11 01 01.2806209440 -54 24 41.572683576   12.98 11.12     M4-7 36 0
22 V* W Cen Mi* 11 55 01.3260078696 -59 15 13.535219196   11.04 7.60     M5e 69 0
23 V* RX Cen Mi* 13 51 25.4509168188 -36 56 37.672309117   13.84 12.31 12.54   M5 56 0
24 V* RR Boo Mi* 14 47 05.7846522432 +39 19 01.557781824   12.09 11.01 9.06   M2-6e 66 0
25 V* RT Boo Mi* 15 17 14.7082315152 +36 21 33.437211804   12.28 11.37 8.83   M6.5e 55 0
26 V* S Ser Mi* 15 21 39.5340937176 +14 18 53.092200960   12.37 11.37     M5e 130 0
27 V* X CrB Mi* 15 48 53.5259660688 +36 14 52.594027944   12.05 8.50 8.87   M6.5e 68 0
28 V* AH Ser Mi* 15 59 20.5548455832 +19 46 47.294541984   12.67 11.70 12.41   M2 30 0
29 V* RU Her Mi* 16 10 14.5126789272 +25 04 14.306977524   13.82 12.24 7.56 4.15 M6-7e 224 0
30 V* SS Her Mi* 16 32 55.5442374336 +06 51 29.737967652   11.74 8.50     M0-5+e 74 0
31 V* X Ara Mi* 16 36 24.6564710088 -55 24 53.220097008   12.43 10.90     M7II-IIIe 44 1
32 V* Z Oct Mi* 17 44 36.5922552096 -86 29 10.608273672   12.96 11.53     ~ 29 0
33 V* XZ Her Mi* 18 10 03.6140017536 +18 06 25.414335468           M0 38 0
34 HIP 91260 * 18 36 54.4546574592 +28 04 21.626029092   11.84 11.48     ~ 9 1
35 V* V733 Sgr Mi* 19 00 08.1797048184 -18 15 10.118116224           ~ 19 0
36 V* HO Lyr Mi* 19 20 08.7527821008 +41 40 59.110223052     11.30 11.67 9.224 M2e 27 0
37 V* AM Cyg Mi* 20 49 00.8453216184 +31 50 55.774569372       9.05   M6e 30 0
38 V* V Cap Mi* 21 07 36.6533698752 -23 55 13.456573644           M5.5-6e 47 0
39 V* V Mic OH* 21 23 48.7685217528 -40 42 05.204919096   14.26 12.82 13.37   M3/5e 80 0
40 V* DH Lac Mi* 22 12 21.6110714928 +39 25 55.783412364       9.87   M5e 23 0
41 V* UU Tuc OH* 22 22 19.0445081664 -60 52 14.492879544   12.60 11.28     M9 34 0
42 V* RT Oct Mi* 23 01 06.1973522112 -87 03 10.958457672   12.63 11.26     Me 26 0

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