Proper Motion of the Faint Star near KIC 8462852 (Boyajian's Star) - Not a Binary System

Dan P. Clemens; Kush Maheshwari; Roshan Jagani; J. Montgomery; A. M.El Batal; T. G. Ellis; J. T. Wright

doi:10.3847/2041-8213/aab492

Proper Motion of the Faint Star near KIC 8462852 (Boyajian's Star) - Not a Binary System

Dan P. Clemens, Kush Maheshwari, Roshan Jagani, J. Montgomery, A. M.El Batal, T. G. Ellis, J. T. Wright

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

A faint star located 2 arcsec from KIC 8462852 was discovered in Keck 10 m adaptive optics imaging in the JHK near-infrared (NIR) in 2014 by Boyajian et al. (2016). The closeness of the star to KIC 8462852 suggested that the two could constitute a binary, which might have implications for the cause of the brightness dips seen by Kepler and in ground-based optical studies. Here, NIR imaging in 2017 using the Mimir instrument resolved the pair and enabled measuring their separation. The faint star had moved 67 ± 7 milliarcsec (mas) relative to KIC 8462852 since 2014. The relative proper motion of the faint star is 23.9 ± 2.6 mas yr^-1, for a tangential velocity of 45 ± 5 km s^-1 if it is at the same 390 pc distance as KIC 8462852. Circular velocity at the 750 au current projected separation is 1.5 km s^-1, hence the star pair cannot be bound.

Original language	English (US)
Article number	L8
Journal	Astrophysical Journal Letters
Volume	856
Issue number	1
DOIs	https://doi.org/10.3847/2041-8213/aab492
State	Published - Mar 20 2018

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.3847/2041-8213/aab492

Cite this

@article{614b37cf7d2a498eb9745c2d12ab0714,

title = "Proper Motion of the Faint Star near KIC 8462852 (Boyajian's Star) - Not a Binary System",

abstract = "A faint star located 2 arcsec from KIC 8462852 was discovered in Keck 10 m adaptive optics imaging in the JHK near-infrared (NIR) in 2014 by Boyajian et al. (2016). The closeness of the star to KIC 8462852 suggested that the two could constitute a binary, which might have implications for the cause of the brightness dips seen by Kepler and in ground-based optical studies. Here, NIR imaging in 2017 using the Mimir instrument resolved the pair and enabled measuring their separation. The faint star had moved 67 ± 7 milliarcsec (mas) relative to KIC 8462852 since 2014. The relative proper motion of the faint star is 23.9 ± 2.6 mas yr-1, for a tangential velocity of 45 ± 5 km s-1 if it is at the same 390 pc distance as KIC 8462852. Circular velocity at the 750 au current projected separation is 1.5 km s-1, hence the star pair cannot be bound.",

author = "Clemens, {Dan P.} and Kush Maheshwari and Roshan Jagani and J. Montgomery and Batal, {A. M.El} and Ellis, {T. G.} and Wright, {J. T.}",

year = "2018",

month = mar,

day = "20",

doi = "10.3847/2041-8213/aab492",

language = "English (US)",

volume = "856",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "American Astronomical Society",

number = "1",

}

TY - JOUR

T1 - Proper Motion of the Faint Star near KIC 8462852 (Boyajian's Star) - Not a Binary System

AU - Clemens, Dan P.

AU - Maheshwari, Kush

AU - Jagani, Roshan

AU - Montgomery, J.

AU - Batal, A. M.El

AU - Ellis, T. G.

AU - Wright, J. T.

PY - 2018/3/20

Y1 - 2018/3/20

N2 - A faint star located 2 arcsec from KIC 8462852 was discovered in Keck 10 m adaptive optics imaging in the JHK near-infrared (NIR) in 2014 by Boyajian et al. (2016). The closeness of the star to KIC 8462852 suggested that the two could constitute a binary, which might have implications for the cause of the brightness dips seen by Kepler and in ground-based optical studies. Here, NIR imaging in 2017 using the Mimir instrument resolved the pair and enabled measuring their separation. The faint star had moved 67 ± 7 milliarcsec (mas) relative to KIC 8462852 since 2014. The relative proper motion of the faint star is 23.9 ± 2.6 mas yr-1, for a tangential velocity of 45 ± 5 km s-1 if it is at the same 390 pc distance as KIC 8462852. Circular velocity at the 750 au current projected separation is 1.5 km s-1, hence the star pair cannot be bound.

AB - A faint star located 2 arcsec from KIC 8462852 was discovered in Keck 10 m adaptive optics imaging in the JHK near-infrared (NIR) in 2014 by Boyajian et al. (2016). The closeness of the star to KIC 8462852 suggested that the two could constitute a binary, which might have implications for the cause of the brightness dips seen by Kepler and in ground-based optical studies. Here, NIR imaging in 2017 using the Mimir instrument resolved the pair and enabled measuring their separation. The faint star had moved 67 ± 7 milliarcsec (mas) relative to KIC 8462852 since 2014. The relative proper motion of the faint star is 23.9 ± 2.6 mas yr-1, for a tangential velocity of 45 ± 5 km s-1 if it is at the same 390 pc distance as KIC 8462852. Circular velocity at the 750 au current projected separation is 1.5 km s-1, hence the star pair cannot be bound.

UR - http://www.scopus.com/inward/record.url?scp=85044746293&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85044746293&partnerID=8YFLogxK

U2 - 10.3847/2041-8213/aab492

DO - 10.3847/2041-8213/aab492

M3 - Article

AN - SCOPUS:85044746293

SN - 2041-8205

VL - 856

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L8

ER -

Proper Motion of the Faint Star near KIC 8462852 (Boyajian's Star) - Not a Binary System

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this