J/A+A/705/A60 HD135160 radial velocities (Zummer+, 2026)
Quadruple system HD 135160 in a unique 2+2 configuration.
Zummer M., Harmanec P., Barlow B., Blackford M., Svrckova J.
<Astron. Astrophys. 705, A60 (2026)>
=2026A&A...705A..60Z 2026A&A...705A..60Z (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, spectroscopic ; Radial velocities ; Optical
Keywords: binaries: eclipsing - binaries: spectroscopic -
stars: individual: HD 135160
Abstract:
Analysing a large body of observational data, we found that HD 135160
is a quadruple 2+2 system, composed of a massive ellipsoidal binary
("heartbeat" star) with components Aa and Ab in an eccentric
8.234d orbit and an eclipsing binary (with components Ba and Bb) with
a 5.853d period and partial eclipses that have already been reported
from the space photometry secured by the Transiting Exoplanet Survey
Satellite (TESS). Our systematic echelle spectroscopy, secured since
September 2021, led to the discovery that the optical spectra are
dominated by spectral lines of three early-type stars, two moving
around each other on a 8.234d orbit of a high eccentricity, which
causes periodic brightenings near the periastron passage, and the
third one (component Ba) being the brighter component of the 5.853 d
binary. Both pairs are physically bounded and revolve around each
other with a period somewhere between 1600 and 2200 days
(4.4-6 years). The object exhibits small cyclic light variations of a
variable amplitude and characteristic time scale of 0.071d (14.14c/d),
seen throughout the whole orbit. The nature of these tiny changes
deserves further investigation. It also seems that the earlier
classification of the object as a Be star is unfounded.
Description:
Radial velocities of up to three visible stellar components of
HD 135160 measured with the CHIRON spectrograph using reSPEFO.
For each spectral line we list the RVs and its uncertainty as a mean
of two independent measurements for component 1, component 2, and
component 3 in this order.
If the component is not measurable we record RV as '--'.
Spectral lines included, in the order they appear in table2.dat:
He I 4923 (3 components),
He I 5016 (3 components),
He I 6678 (3 components),
Halpha (3 components),
Hbeta (2 components),
He II 4686 (1 component),
He II 5411 (1 component).
Objects:
------------------------------------------------
RA (2000) DE Designation(s)
------------------------------------------------
15 16 36.69 -60 54 14.4 HD 135160 = HR 5661
------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 266 70 Multi-component RVs per line per epoch
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.4 d HJD Reduced Julian Date (HJD-2400000.0)
11- 18 F8.2 km/s RV1He4923 ?=- He4923 radial velocity of comp. 1
19- 26 F8.2 km/s e_RV1He4923 ?=0 He4923 radial velocity of comp. 1
uncertainty
27- 34 F8.2 km/s RV2He4923 ?=- He4923 radial velocity of comp. 2
35- 42 F8.2 km/s e_RV2He4923 ?=0 He4923 radial velocity of comp. 2
uncertainty
43- 50 F8.2 km/s RV3He4923 ?=- He4923 radial velocity of comp. 3
51- 58 F8.2 km/s e_RV3He4923 ?=0 He4923 radial velocity of comp. 3
uncertainty
59- 66 F8.2 km/s RV1He5016 ?=- He5016 radial velocity of comp. 1
67- 74 F8.2 km/s e_RV1He5016 ?=0 He5016 radial velocity of comp. 1
uncertainty
75- 82 F8.2 km/s RV2He5016 ?=- He5016 radial velocity of comp. 2
83- 90 F8.2 km/s e_RV2He5016 ?=0 He5016 radial velocity of comp. 2
uncertainty
91- 98 F8.2 km/s RV3He5016 ?=- He5016 radial velocity of comp. 3
99-106 F8.2 km/s e_RV3He5016 ?=0 He5016 radial velocity of comp. 3
uncertainty
107-114 F8.2 km/s RV1He6678 ?=- He6678 radial velocity of comp. 1
115-122 F8.2 km/s e_RV1He6678 ?=0 He6678 radial velocity of comp. 1
uncertainty
123-130 F8.2 km/s RV2He6678 ?=- He6678 radial velocity of comp. 2
131-138 F8.2 km/s e_RV2He6678 ?=0 He6678 radial velocity of comp. 2
uncertainty
139-146 F8.2 km/s RV3He6678 ?=- He6678 radial velocity of comp. 3
147-154 F8.2 km/s e_RV3He6678 ?=0 He6678 radial velocity of comp. 3
uncertainty
155-162 F8.2 km/s RV1Ha ?=- Hα radial velocity of comp. 1
163-170 F8.2 km/s e_RV1Ha ?=0 Hα radial velocity of comp. 1
uncertainty
171-178 F8.2 km/s RV2Ha ?=- Hα radial velocity of comp. 2
179-186 F8.2 km/s e_RV2Ha ?=0 Hα radial velocity of comp. 2
uncertainty
187-194 F8.2 km/s RV3Ha ?=- Hα radial velocity of comp. 3
195-202 F8.2 km/s e_RV3Ha ?=0 Hα radial velocity of comp. 3
uncertainty
203-210 F8.2 km/s RV1Hb ?=- Hβ radial velocity of comp. 1
211-218 F8.2 km/s e_RV1Hb ?=0 Hβ radial velocity of comp. 1
uncertainty
219-226 F8.2 km/s RV2Hb ?=- Hβ radial velocity of comp. 2
227-234 F8.2 km/s e_RV2Hb ?=0 Hβ radial velocity of comp. 2
uncertainty
235-242 F8.2 km/s RV1HeII4686 ?=- HeII4686 radial velocity of comp. 1
243-250 F8.2 km/s e_RV1HeII4686 ?=0 HeII4686 radial velocity of comp. 1
uncertainty
251-258 F8.2 km/s RV1HeII5411 ?=- HeII5411 radial velocity of comp. 1
259-266 F8.2 km/s e_RV1HeII5411 ?=0 HeII5411 radial velocity of comp. 1
uncertainty
--------------------------------------------------------------------------------
Acknowledgements:
Michal Zummer, michalmiskozummer(at)gmail.com,
Astronomical Institute, Charles University, Czech Republic
(End) M. Zummer [Astron. Inst. Charles Univ], P. Vannier [CDS] 14-Nov-2025