Increasing the census of ultracool dwarfs in wide binary and multiple systems using Dark Energy Survey DR1 and Gaia DR2 data

M. Dal Ponte; B. Santiago; A. Carnero Rosell; B. Burningham; B. Yanny; J. L. Marshall; K. Bechtol; P. Martini; T. S. Li; L. De Paris; T. M.C. Abbott; M. Aguena; S. Allam; S. Avila; E. Bertin; S. Bhargava; D. Brooks; E. Buckley-Geer; M. Carrasco Kind; J. Carretero; L. N. Da Costa; J. De Vicente; H. T. Diehl; P. Doel; T. F. Eifler; S. Everett; B. Flaugher; P. Fosalba; J. Frieman; J. Garciá-Bellido; E. Gaztanaga; D. W. Gerdes; D. Gruen; R. A. Gruendl; J. Gschwend; G. Gutierrez; S. R. Hinton; D. L. Hollowood; K. Honscheid; D. J. James; K. Kuehn; N. Kuropatkin; M. A.G. Maia; M. March; F. Menanteau; R. Miquel; A. Palmese; F. Paz-Chinchón; A. A. Plazas; E. Sanchez; V. Scarpine; S. Serrano; I. Sevilla-Noarbe; M. Smith; E. Suchyta; M. E.C. Swanson; G. Tarle; D. Thomas; T. N. Varga; A. R. Walker

doi:10.1093/mnras/staa3118

Increasing the census of ultracool dwarfs in wide binary and multiple systems using Dark Energy Survey DR1 and Gaia DR2 data

M. Dal Ponte, B. Santiago, A. Carnero Rosell, B. Burningham, B. Yanny, J. L. Marshall, K. Bechtol, P. Martini, T. S. Li, L. De Paris, T. M.C. Abbott, M. Aguena, S. Allam, S. Avila, E. Bertin, S. Bhargava, D. Brooks, E. Buckley-Geer, M. Carrasco Kind, J. CarreteroL. N. Da Costa, J. De Vicente, H. T. Diehl, P. Doel, T. F. Eifler, S. Everett, B. Flaugher, P. Fosalba, J. Frieman, J. Garciá-Bellido, E. Gaztanaga, D. W. Gerdes, D. Gruen, R. A. Gruendl, J. Gschwend, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, D. J. James, K. Kuehn, N. Kuropatkin, M. A.G. Maia, M. March, F. Menanteau, R. Miquel, A. Palmese, F. Paz-Chinchón, A. A. Plazas, E. Sanchez, V. Scarpine, S. Serrano, I. Sevilla-Noarbe, M. Smith, E. Suchyta, M. E.C. Swanson, G. Tarle, D. Thomas, T. N. Varga, A. R. Walker

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Abstract

We present the discovery of 255 binary and 6 multiple system candidates with wide (> 5 arcsec) separation composed by ultracool dwarfs (UCDs) companions to stars, plus nine double ultracool dwarf systems. These systems were selected based on common distance criteria. About 90 per cent of the total sample has proper motions available and 73 per cent of the systems also satisfy a common proper motion criterion. The sample of ultracool candidates was taken from the Dark Energy Survey (DES) and the candidate stellar primaries are from Gaia DR2 and DES data. We compute chance alignment probabilities in order to assess the physical nature of each pair. We find that 174 candidate pairs with Gaia DR2 primaries and 81 pairs with a DES star as a primary have chance alignment probabilities < 5. Only nine candidate systems composed of two UCDs were identified. The sample of candidate multiple systems is made up of five triple systems and one quadruple system. The majority of the UCDs found in binaries and multiples are of early L type and the typical wide binary fraction over the L spectral types is 2-4. Our sample of candidate wide binaries with UCDs as secondaries constitutes a substantial increase over the known number of such systems, which are very useful to constrain the formation and evolution of UCDs.

Original language	English
Pages (from-to)	5302-5317
Number of pages	16
Journal	Monthly Notices of the Royal Astronomical Society
Volume	499
Issue number	4
DOIs	https://doi.org/10.1093/mnras/staa3118
State	Published - Dec 1 2020
Externally published	Yes

Funding

Funders	Funder number
Seventh Framework Programme	1138766, 240672, 306478, 291329

Keywords

binaries: general
brown dwarfs
stars: low-mass

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10.1093/mnras/staa3118

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Dal Ponte, M., Santiago, B., Carnero Rosell, A., Burningham, B., Yanny, B., Marshall, J. L., Bechtol, K., Martini, P., Li, T. S., De Paris, L., Abbott, T. M. C., Aguena, M., Allam, S., Avila, S., Bertin, E., Bhargava, S., Brooks, D., Buckley-Geer, E., Carrasco Kind, M., ... Walker, A. R. (2020). Increasing the census of ultracool dwarfs in wide binary and multiple systems using Dark Energy Survey DR1 and Gaia DR2 data. Monthly Notices of the Royal Astronomical Society, 499(4), 5302-5317. https://doi.org/10.1093/mnras/staa3118

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title = "Increasing the census of ultracool dwarfs in wide binary and multiple systems using Dark Energy Survey DR1 and Gaia DR2 data",

abstract = "We present the discovery of 255 binary and 6 multiple system candidates with wide (> 5 arcsec) separation composed by ultracool dwarfs (UCDs) companions to stars, plus nine double ultracool dwarf systems. These systems were selected based on common distance criteria. About 90 per cent of the total sample has proper motions available and 73 per cent of the systems also satisfy a common proper motion criterion. The sample of ultracool candidates was taken from the Dark Energy Survey (DES) and the candidate stellar primaries are from Gaia DR2 and DES data. We compute chance alignment probabilities in order to assess the physical nature of each pair. We find that 174 candidate pairs with Gaia DR2 primaries and 81 pairs with a DES star as a primary have chance alignment probabilities < 5. Only nine candidate systems composed of two UCDs were identified. The sample of candidate multiple systems is made up of five triple systems and one quadruple system. The majority of the UCDs found in binaries and multiples are of early L type and the typical wide binary fraction over the L spectral types is 2-4. Our sample of candidate wide binaries with UCDs as secondaries constitutes a substantial increase over the known number of such systems, which are very useful to constrain the formation and evolution of UCDs.",

keywords = "binaries: general, brown dwarfs, stars: low-mass",

author = "{Dal Ponte}, M. and B. Santiago and {Carnero Rosell}, A. and B. Burningham and B. Yanny and Marshall, {J. L.} and K. Bechtol and P. Martini and Li, {T. S.} and {De Paris}, L. and Abbott, {T. M.C.} and M. Aguena and S. Allam and S. Avila and E. Bertin and S. Bhargava and D. Brooks and E. Buckley-Geer and {Carrasco Kind}, M. and J. Carretero and {Da Costa}, {L. N.} and {De Vicente}, J. and Diehl, {H. T.} and P. Doel and Eifler, {T. F.} and S. Everett and B. Flaugher and P. Fosalba and J. Frieman and J. Garci{\'a}-Bellido and E. Gaztanaga and Gerdes, {D. W.} and D. Gruen and Gruendl, {R. A.} and J. Gschwend and G. Gutierrez and Hinton, {S. R.} and Hollowood, {D. L.} and K. Honscheid and James, {D. J.} and K. Kuehn and N. Kuropatkin and Maia, {M. A.G.} and M. March and F. Menanteau and R. Miquel and A. Palmese and F. Paz-Chinch{\'o}n and Plazas, {A. A.} and E. Sanchez and V. Scarpine and S. Serrano and I. Sevilla-Noarbe and M. Smith and E. Suchyta and Swanson, {M. E.C.} and G. Tarle and D. Thomas and Varga, {T. N.} and Walker, {A. R.}",

note = "Publisher Copyright: {\textcopyright} 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.",

year = "2020",

month = dec,

day = "1",

doi = "10.1093/mnras/staa3118",

language = "English",

volume = "499",

pages = "5302--5317",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "4",

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Dal Ponte, M, Santiago, B, Carnero Rosell, A, Burningham, B, Yanny, B, Marshall, JL, Bechtol, K, Martini, P, Li, TS, De Paris, L, Abbott, TMC, Aguena, M, Allam, S, Avila, S, Bertin, E, Bhargava, S, Brooks, D, Buckley-Geer, E, Carrasco Kind, M, Carretero, J, Da Costa, LN, De Vicente, J, Diehl, HT, Doel, P, Eifler, TF, Everett, S, Flaugher, B, Fosalba, P, Frieman, J, Garciá-Bellido, J, Gaztanaga, E, Gerdes, DW, Gruen, D, Gruendl, RA, Gschwend, J, Gutierrez, G, Hinton, SR, Hollowood, DL, Honscheid, K, James, DJ, Kuehn, K, Kuropatkin, N, Maia, MAG, March, M, Menanteau, F, Miquel, R, Palmese, A, Paz-Chinchón, F, Plazas, AA, Sanchez, E, Scarpine, V, Serrano, S, Sevilla-Noarbe, I, Smith, M, Suchyta, E, Swanson, MEC, Tarle, G, Thomas, D, Varga, TN & Walker, AR 2020, 'Increasing the census of ultracool dwarfs in wide binary and multiple systems using Dark Energy Survey DR1 and Gaia DR2 data', Monthly Notices of the Royal Astronomical Society, vol. 499, no. 4, pp. 5302-5317. https://doi.org/10.1093/mnras/staa3118

TY - JOUR

T1 - Increasing the census of ultracool dwarfs in wide binary and multiple systems using Dark Energy Survey DR1 and Gaia DR2 data

AU - Dal Ponte, M.

AU - Santiago, B.

AU - Carnero Rosell, A.

AU - Burningham, B.

AU - Yanny, B.

AU - Marshall, J. L.

AU - Bechtol, K.

AU - Martini, P.

AU - Li, T. S.

AU - De Paris, L.

AU - Abbott, T. M.C.

AU - Aguena, M.

AU - Allam, S.

AU - Avila, S.

AU - Bertin, E.

AU - Bhargava, S.

AU - Brooks, D.

AU - Buckley-Geer, E.

AU - Carrasco Kind, M.

AU - Carretero, J.

AU - Da Costa, L. N.

AU - De Vicente, J.

AU - Diehl, H. T.

AU - Doel, P.

AU - Eifler, T. F.

AU - Everett, S.

AU - Flaugher, B.

AU - Fosalba, P.

AU - Frieman, J.

AU - Garciá-Bellido, J.

AU - Gaztanaga, E.

AU - Gerdes, D. W.

AU - Gruen, D.

AU - Gruendl, R. A.

AU - Gschwend, J.

AU - Gutierrez, G.

AU - Hinton, S. R.

AU - Hollowood, D. L.

AU - Honscheid, K.

AU - James, D. J.

AU - Kuehn, K.

AU - Kuropatkin, N.

AU - Maia, M. A.G.

AU - March, M.

AU - Menanteau, F.

AU - Miquel, R.

AU - Palmese, A.

AU - Paz-Chinchón, F.

AU - Plazas, A. A.

AU - Sanchez, E.

AU - Scarpine, V.

AU - Serrano, S.

AU - Sevilla-Noarbe, I.

AU - Smith, M.

AU - Suchyta, E.

AU - Swanson, M. E.C.

AU - Tarle, G.

AU - Thomas, D.

AU - Varga, T. N.

AU - Walker, A. R.

PY - 2020/12/1

Y1 - 2020/12/1

N2 - We present the discovery of 255 binary and 6 multiple system candidates with wide (> 5 arcsec) separation composed by ultracool dwarfs (UCDs) companions to stars, plus nine double ultracool dwarf systems. These systems were selected based on common distance criteria. About 90 per cent of the total sample has proper motions available and 73 per cent of the systems also satisfy a common proper motion criterion. The sample of ultracool candidates was taken from the Dark Energy Survey (DES) and the candidate stellar primaries are from Gaia DR2 and DES data. We compute chance alignment probabilities in order to assess the physical nature of each pair. We find that 174 candidate pairs with Gaia DR2 primaries and 81 pairs with a DES star as a primary have chance alignment probabilities < 5. Only nine candidate systems composed of two UCDs were identified. The sample of candidate multiple systems is made up of five triple systems and one quadruple system. The majority of the UCDs found in binaries and multiples are of early L type and the typical wide binary fraction over the L spectral types is 2-4. Our sample of candidate wide binaries with UCDs as secondaries constitutes a substantial increase over the known number of such systems, which are very useful to constrain the formation and evolution of UCDs.

AB - We present the discovery of 255 binary and 6 multiple system candidates with wide (> 5 arcsec) separation composed by ultracool dwarfs (UCDs) companions to stars, plus nine double ultracool dwarf systems. These systems were selected based on common distance criteria. About 90 per cent of the total sample has proper motions available and 73 per cent of the systems also satisfy a common proper motion criterion. The sample of ultracool candidates was taken from the Dark Energy Survey (DES) and the candidate stellar primaries are from Gaia DR2 and DES data. We compute chance alignment probabilities in order to assess the physical nature of each pair. We find that 174 candidate pairs with Gaia DR2 primaries and 81 pairs with a DES star as a primary have chance alignment probabilities < 5. Only nine candidate systems composed of two UCDs were identified. The sample of candidate multiple systems is made up of five triple systems and one quadruple system. The majority of the UCDs found in binaries and multiples are of early L type and the typical wide binary fraction over the L spectral types is 2-4. Our sample of candidate wide binaries with UCDs as secondaries constitutes a substantial increase over the known number of such systems, which are very useful to constrain the formation and evolution of UCDs.

KW - binaries: general

KW - brown dwarfs

KW - stars: low-mass

UR - http://www.scopus.com/inward/record.url?scp=85096902937&partnerID=8YFLogxK

U2 - 10.1093/mnras/staa3118

DO - 10.1093/mnras/staa3118

M3 - Article

AN - SCOPUS:85096902937

SN - 0035-8711

VL - 499

SP - 5302

EP - 5317

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

Increasing the census of ultracool dwarfs in wide binary and multiple systems using Dark Energy Survey DR1 and Gaia DR2 data

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