High mass function ellipsoidal variables in the Gaia Focused Product Release: searching for black hole candidates in the binary zoo

Abstract

The recent Gaia Focused Product Release contains radial velocity time-series for more than 9,000 Gaia long-period photometric variables. Here we search for binary systems with large radial velocity amplitudes to identify candidates with massive, unseen companions. Eight targets have binary mass function $f(M)>1M_{\odot }$, three of which are eclipsing binaries. The remaining five show evidence of ellipsoidal modulations. We fit spectroscopic orbit models to the Gaia radial velocities, and fit the spectral energy distributions of three targets. For the two systems most likely to host dark companions, J0946 and J1640, we use PHOEBE to fit the ASAS-SN light curves and Gaia radial velocities. The derived companion masses are $>3M_{\odot }$, but the high Galactic dust extinctions towards these objects limit our ability to rule out main sequence companions or subgiants hotter than the photometric primaries. These systems are similar to other stellar-mass black hole impostors, notably the Unicorn (V723 Mon) and the Giraffe (2M04123153$+$6738486). While it is possible that J1640 and J0946 are similar examples of stripped giant star binaries, high-resolution spectra can be used to determine the nature of their companions.

arXiv comment18 pages, 13 figures. Accepted to The Open Journal of Astrophysics

References in corpus (56)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• Gaia Data Release 3: Summary of the content and survey properties
• Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar
• Gaia Early Data Release 3: Parallax bias versus magnitude, colour, and position
• A Computational Guide to Physics of Eclipsing Binaries. Paper I. Demonstrations and Perspectives
• The Black Hole Mass Distribution in the Galaxy
• Modelling the Galactic Interstellar Extinction Distribution in Three Dimensions
• The Mass Distribution of Stellar-Mass Black Holes
• New Grids of ATLAS9 Model Atmospheres
• Self-similarity and scaling behavior of IR emission from radiatively heated dust: I. Theory
• A three-dimensional Galactic extinction model
• The Neutron Star and Black Hole Initial Mass Function
• Progenitors of gravitational wave mergers: Binary evolution with the stellar grid-based code ComBinE
• Gaia Data Release 3 Properties and validation of the radial velocities
• Discovery of a Candidate Black Hole - Giant Star Binary System in the Galactic Field
• Gaia Data Release 3: Stellar multiplicity, a teaser for the hidden treasure
• A Black Hole in the Superluminal source SAX J1819.3-2525 (V4641 Sgr)
• Investigating stellar-mass black hole kicks
• A detached stellar-mass black hole candidate in the globular cluster NGC 3201
• Gaia Data Release 3: Processing and validation of BP/RP low-resolution spectral data
• A Sun-like star orbiting a black hole
• Updated Gaia-2MASS 3D maps of Galactic interstellar dust
• A red giant orbiting a black hole
• An isolated mass gap black hole or neutron star detected with astrometric microlensing
• Simple recipes for compact remnant masses and natal kicks
• A Unicorn in Monoceros: the $3M_{\odot }$ dark companion to the bright, nearby red giant V723 Mon is a non-interacting, mass-gap black hole candidate
• A non-interacting Galactic black hole candidate in a binary system with a main-sequence star
• Gaia DR3: Specific processing and validation of all-sky RR Lyrae and Cepheid stars -- The Cepheid sample
• Gaia Data Release 3: The Galaxy in your preferred colours. Synthetic photometry from Gaia low-resolution spectra
• Gaia Data Release 3: The second Gaia catalogue of Long-Period Variable candidates
• TESS-Gaia Light Curve: a PSF-based TESS FFI light curve product
• Constraints on Core Collapse from the Black Hole Mass Function
• Populations of stellar mass Black holes from binary systems
• The ASAS-SN Catalog of Variable Stars IX: The Spectroscopic Properties of Galactic Variable Stars
• Unicorns and Giraffes in the binary zoo: stripped giants with subgiant companions
• The ASAS-SN Catalog of Variable Stars X: Discovery of 116,000 New Variable Stars Using g-band Photometry
• Search for a Black Hole Binary in Gaia DR3 Astrometric Binary Stars with Spectroscopic Data
• Mg II h + k emission lines as stellar activity indicators of main sequence F-K stars
• Updating the theoretical tidal evolution constants: Apsidal motion and the moment of inertia
• 15000 Ellipsoidal Binary Candidates in TESS: Orbital Periods, Binary Fraction, and Tertiary Companions
• Search for Dormant Black Holes in Ellipsoidal Variables I. Revisiting the Expected Amplitudes of the Photometric Modulation
• What are the spectroscopic binaries with high mass functions near the Gaia DR3 main sequence?
• Gaia Data Release 3: Ellipsoidal Variables with Possible Black-Hole or Neutron Star secondaries
• High Tide: A Systematic Search for Ellipsoidal Variables in ASAS-SN
• Gaia Spectroscopic Orbits Validated with LAMOST and GALAH Radial Velocities
• Apsidal motion in the massive binary HD 152248 -- Constraining the internal structure of the stars
• The "Giraffe": Discovery of a stripped red giant in an interacting binary with a $\sim 2M_{\odot }$ lower giant
• A search for compact object companions to high mass function single-lined spectroscopic binaries in Gaia DR3
• Close Encounters of Tight Binary Stars with Stellar-mass Black Holes
• ASAS-SN Sky Patrol V2.0
• Spectroscopic follow-up of black hole and neutron star candidates in ellipsoidal variables from Gaia DR3
• The WIRED Survey III: An Infrared Excess around the Eclipsing Post-Common Envelope Binary SDSS J030308.35+005443.7
• Probing infrared excess connection with Li enhancement among red clump giants
• The Value-Added Catalog of ASAS-SN Eclipsing Binaries II: Properties of Extra-Physics Systems
• Detecting Detached Black Hole binaries through Photometric Variability

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• An upper limit on the frequency of short-period black hole companions to Sun-like stars
• A comprehensive Gaia view of ellipsoidal and rotational red giant binaries
• Distinguishing between light curves of ellipsoidal variables with massive dark companions, contact binaries, and semidetached binaries using principal component analysis