Bright Long Secondary Period Stars for Follow-up Observations
P. Iwanek1, D.M. Skowron1, G. Pojmański1, I. Soszyński1
1Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
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Location of bright LSP stars. |
Abstract
Long secondary period (LSP) variable stars are a subclass of long-period
variables (LPV) that exhibit additional long-term variability alongside
pulsations. Despite being observed in over 30% of LPVs, the reason behind
the LSP phenomenon is still debated. The most favoured explanation,
supported by recent growing evidence, is binarity, where the pulsating
giant star has a substellar- mass companion. To further test this
hypothesis, it is important to identify bright LSP variables, for which
high-quality spectroscopic and interferometric observations can be
obtained more easily. Motivated by the absence of a catalog of bright
nearby LSPs, we searched the
The All Sky Automated Survey (ASAS)
data in the V-band magnitude range 5.5-14 mag, and for declinations < +28 ◦.
The resulting catalog contains 23 LSPs, 13 of which are new discoveries.
We compare our catalog with the LSP lists available in the literature.
Key words: stars: AGB and post-AGB, stars: late-type, stars: variables: general, astronomical databases:catalogs
Results
Table
bright_lsp_asas.txt
with all information about bright variables exhibiting LSP behaviour,
i.e., ASAS, Gaia DR3 and other IDs, equatorial coordinates (R.A. and Decl.), mean ASAS V-band magnitude,
V-band amplitude, long secondary period, pulsation period, Gaia parallax, parallax error,
distance, distance error, the Renormalized Unit Weight Error (RUWE),
and JHKs-bands magnitudes from 2MASS.
Compressed light curves of stars can downloaded
here
Table description
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Byte-by-byte Description of file: bright_lsp_asas.txt
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Bytes Format Units Label Explanations
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1- 13 A13 --- ASASID ASAS Star ID
15- 16 I2 h RAh Hour of Right Ascension (J2000)
18- 19 I2 min RAm Minute of Right Ascension (J2000)
21- 22 I2 s RAs Second of Right Ascension (J2000)
24- 24 A1 --- DE- Sign of the Declination (J2000)
25- 26 I3 deg DEd Degree of Declination (J2000)
28- 29 I2 arcmin DEm Arcminute of Declination (J2000)
31- 32 I2 arcsec DEs Arcsecond of Declination (J2000)
34- 40 F7.2 d PL Long Secondary Period
42- 50 F9.5 d PS Pulsation Period
52- 56 F5.3 mag Vmag Mean ASAS V-band magnitude
58- 62 F5.3 mag Vampl ASAS V-band brightness amplitude
64- 82 I19 --- GaiaDR3ID Gaia DR3 Star ID
84- 89 F6.4 mas plx Parallax
91- 96 F6.4 mas e_plx Parallax Uncertainty
98-100 I3 pc d Distance
102-103 I2 pc e_d Distance Uncertainty
105-110 F6.4 --- RUWE Renormalized Unit Weight Error
112-116 F5.3 mag Jmag 2MASS J-band magnitude
118-123 A6 mag Hmag 2MASS H-band magnitude
125-130 F6.3 mag Ksmag 2MASS Ks-band magnitude
132-140 A9 --- OtherID Other Star ID
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Note: The table is ordered by increasing right ascension.
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Table content
ASASID RA DEC lP pP V Vamp Gaia DR3 no plx e_plx d e_d RUWE Jmag Hmag Ksmag OtherID
034419-4153.9 3 44 19 -41 53 54 381.95 49.46690 7.514 0.576 4848874011097672576 1.3433 0.0152 740 9 1.0170 4.295 3.355 3.123 EU Eri
041330-1023.2 4 13 30 -10 23 12 568.25 61.59566 7.456 0.993 3191955033656822656 2.4857 0.0486 396 8 1.1430 2.482 1.635 1.355 BM Eri
052037-4332.0 5 20 37 -43 32 0 363.27 41.79879 6.520 0.446 4800503505295394304 2.6781 0.0262 372 3 0.9280 2.774 1.842 1.630 WW Pic
060546-2411.7 6 5 46 -24 11 42 873.13 96.91697 6.672 0.903 2913152694837288192 3.8975 0.1041 257 7 1.2710 0.796 -0.175 -0.505 S Lep
061602-2730.6 6 16 2 -27 30 48 820.20 99.29974 7.860 0.869 2899323552978274176 2.3803 0.0523 415 9 1.2220 2.033 1.087 0.787 NSV 16816
064943+2529.1 6 49 43 25 29 6 231.75 85.01045 6.960 0.511 3381600414124419584 1.8846 0.0367 521 10 1.1350 4.094 3.344 3.099 QU Gem
070514-3556.4 7 5 14 -35 56 24 965.74 88.15070 7.215 1.151 5578428769590816256 3.6266 0.1542 277 11 3.7520 0.674 -0.240 -0.544 HD 53917
071504-2246.6 7 15 4 -22 46 36 300.51 22.80535 7.290 0.178 2927947792030206976 1.4405 0.1213 689 53 6.9320 3.813 2.816 2.599 HD 56159
083740-4026.1 8 37 40 -40 26 6 540.73 93.59966 7.043 0.909 5528303889906184960 2.3605 0.0269 419 4 0.9720 2.530 1.621 1.346 GO Vel
083801-4654.3 8 38 1 -46 54 18 1064.48 106.60185 7.957 1.195 5521580651198875008 2.8405 0.1145 358 15 1.0130 1.101 0.192 -0.186 MN Vel
093615-5232.7 9 36 15 -52 32 42 360.82 37.07340 7.410 0.604 5312562975355731456 1.8384 0.0158 542 4 0.9940 3.963 2.981 2.755 MS Vel
095104-2301.0 9 51 4 -23 1 0 912.36 80.20809 6.745 0.684 5663852920326093952 2.1991 0.0961 453 19 0.9320 2.255 1.124 0.521 Y Hya
110015-4454.6 11 0 15 -44 54 36 274.93 59.08510 7.282 0.118 5387245515953555968 1.6454 0.0346 597 11 1.8420 3.887 2.935 2.727 V0358 Vel
122434-4926.4 12 24 34 -49 26 24 612.78 60.37539 7.624 0.318 6126837819170763008 1.5635 0.0291 638 12 0.9890 3.933 2.848 2.442 S Cen
130005+0018.5 13 0 5 0 18 30 471.35 47.06715 7.539 0.273 3689410721541718272 1.5102 0.0306 646 14 1.0170 4.083 3.103 2.815 HD 112915
181755+1758.9 18 17 55 17 58 54 630.12 76.68265 7.338 0.701 4523659121810239744 4.2058 0.0744 237 4 1.8110 1.285 0.248 0.070 IQ Her
182653+0354.8 18 26 53 3 54 48 828.36 74.50382 8.031 0.910 4284072754993455616 2.2172 0.1170 436 24 1.0310 2.103 NULL 0.827 V0988 Oph
183631-6953.1 18 36 31 -69 53 6 744.24 89.94157 8.133 0.824 6431818980098135040 1.9790 0.0657 506 15 0.8250 2.685 1.719 1.388 RT Pav
204528+1805.4 20 45 28 18 5 24 1183.12 78.53356 6.716 0.862 1813013108479261312 2.9865 0.1006 328 11 1.0600 1.026 -0.019 -0.212 U Del
205813+2353.7 20 58 13 23 53 42 415.32 47.33488 7.425 0.463 1839669874543519872 1.3914 0.0221 705 10 0.9970 4.111 3.201 2.888 HD 199696
215914-0858.2 21 59 14 -8 58 12 476.01 55.07454 8.260 0.930 2617670489740842496 1.4052 0.0344 689 14 1.0790 3.244 2.255 1.966 HD 208843
234419-5426.2 23 44 19 -54 26 12 773.43 76.40038 7.425 0.813 6497754390309381376 1.9502 0.1017 515 28 1.6980 3.244 2.255 1.966 CI Phe
234958-6108.1 23 49 58 -61 8 6 622.89 58.13406 7.515 0.630 6487905510607409280 2.2205 0.0238 446 5 0.9890 2.583 1.706 1.440 DU Tuc
