J/AJ/166/6 Gaia DR3 4373465352415301632 chemical abundances (Chakrabarti+, 2023)
A Noninteracting Galactic Black Hole Candidate in a Binary System with a
Main-sequence Star.
Chakrabarti S., Simon J.D., Craig P.A., Reggiani H., Brandt T.D.,
Guhathakurta P., Dalba P.A., Kirby E.N., Chang P., Hey D.R., Savino A.,
Geha M., Thompson I.B.
<Astron. J., 166, 6 (2023)>
=2023AJ....166....6C 2023AJ....166....6C (SIMBAD/NED BibCode)
ADC_Keywords: Black holes; Stars, double and multiple; Milky Way; Optical
Keywords: Binary stars; Astrometric binary stars; Black holes
High-resolution spectroscopy; Gaia; Milky Way Galaxy
Abstract:
We describe the discovery of a solar neighborhood (d=468pc) binary
system with a main-sequence sunlike star and a massive noninteracting
black hole candidate. The spectral energy distribution of the visible
star is described by a single stellar model. We derive stellar
parameters from a high signal-to-noise Magellan/MIKE spectrum,
classifying the star as a main-sequence star with Teff=5972K,
logg=4.54, and M=0.91M☉ The spectrum shows no indication of a
second luminous component. To determine the spectroscopic orbit of the
binary, we measured the radial velocities of this system with the
Automated Planet Finder, Magellan, and Keck over four months. We show
that the velocity data are consistent with the Gaia astrometric orbit
and provide independent evidence for a massive dark companion. From a
combined fit of our spectroscopic data and the astrometry, we derive a
companion mass of 11.39-1.31+1.51M☉. We conclude that this
binary system harbors a massive black hole on an eccentric
(e=0.46±0.02), 185.4±0.1day orbit. These conclusions are
independent of El-Badry et al., who recently reported the discovery of
the same system. A joint fit to all available data yields a comparable
period solution but a lower companion mass of
9.32-0.21+0.22M☉. Radial velocity fits to all available data
produce a unimodal solution for the period that is not possible with
either data set alone. The combination of both data sets yields the
most accurate orbit currently available.
Description:
We retrieved UV-IR photometry for this source from GALEX, SDSS, the
APASS survey, Gaia DR3, PanSTARRS, SkyMapper, 2MASS, and WISE.
Objects:
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RA (2000) DE Designation(s)
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17 28 41.09 +00 34 51.5 Gaia DR3 4373465352415301632 = UCAC4 448-068998
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 39 213 Atomic data, equivalent widths and line
abundances
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See also:
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
II/281 : 2MASS 6X Point Source Working Database / Catalog (Cutri+ 2006)
II/336 : AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)
II/358 : SkyMapper Southern Sky Survey. DR1.1 (Wolf+, 2018)
V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)
J/A+A/560/A16 : Comparison of evolutionary tracks (Martins+, 2013)
J/A+A/564/A125 : AGN Torus model comparison of AGN in CDFS (Buchner+, 2014)
J/A+A/587/A61 : BlackCAT, stellar-mass BH X-ray trans (Corral-Santana+, 2016)
J/A+A/625/A104 : parameters of OB stars in SMC wing (Ramachandran+, 2019)
J/A+A/627/A177 : Non-LTE analysis of K I in late-type stars (Reggiani+, 2019)
J/A+A/630/A104 : Disk and halo stars C, O and Fe abundances (Amarsi+, 2019)
J/A+A/632/A3 : MUSE binaries in NGC 3201 (Giesers+, 2019)
J/A+A/649/A3 : Gaia ED3 photometric passbands (Riello+, 2021)
J/A+A/660/A122 : O stars companion mass function (Reggiani+, 2022)
J/A+A/664/A159 : Radial velocities of Galactic SB1s (Mahy+, 2022)
J/A+A/674/A10 : Gaia DR3 systems with companions (Holl+, 2023)
J/A+AS/125/229 : A standard stellar library (Lejeune+ 1997)
J/A+AS/130/65 : A standard stellar library. II. (Lejeune+ 1998)
J/AJ/126/2048 : NStars project; the Northern Sample. I. (Gray+, 2003)
J/AJ/162/285 : 37 binaries in NGC2516 and NGC2422 (Lipartito+, 2021)
J/AJ/163/159 : Species abundances in WASP-77A (Reggiani+, 2022)
J/AJ/163/252 : abundances for 15 extreme-velocity stars (Reggiani+, 2022)
J/ApJ/805/175 : Keck and APF radial velocities of HD7924 (Fulton+, 2015)
J/ApJ/889/27 : Abundances of 11 stars in Carina II and III (Ji+, 2020)
J/ApJ/893/96 : CHAOS IV NGC3184 LBT obs. & 3 other gal. abund (Berg+, 2020)
J/ApJ/907/17 : HMXB-dominant galaxy sample and properties (Lehmer+, 2021)
J/ApJS/224/4 : GOSSS III. 142 add O-type systems (Maiz Apellaniz+, 2016)
J/ApJS/225/32 : Extended abundance analysis of cool stars (Brewer+, 2016)
J/ApJS/239/32 : APOKASC-2 Kepler evolved stars (Pinsonneault+, 2018)
J/MNRAS/400/1479 : RV catalogue of O-type stars in NGC 6611 (Sana+, 2009)
J/MNRAS/448/946 : Kepler eclipse timing variation analyses (Borkovits+, 2015)
J/other/Sci/337.444 : RV curves of Galactic massive O stars (Sana+, 2012)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 8 F8.3 0.1nm Wave [4082/8774] Wavelength; Angstroms
10- 13 A4 --- Species Species identifier
15- 19 F5.3 eV ExPot [0/10] Excitation potential
21- 26 F6.3 [-] loggf [-5.63/0.52] log oscillator strength
28- 33 F6.2 10-13m EW [7.28/139] Equivalent width; milliAngstroms
35- 39 F5.3 [-] logX [1.54/8.71] log abundance
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 29-Jan-2024