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Title: DISCOVERY AND CHARACTERIZATION OF WIDE BINARY SYSTEMS WITH A VERY LOW MASS COMPONENT

Abstract

We report the discovery of 14 low-mass binary systems containing mid-M to mid-L dwarf companions with separations larger than 250 AU. We also report the independent discovery of nine other systems with similar characteristics that were recently discovered in other studies. We have identified these systems by searching for common proper motion sources in the vicinity of known high proper motion stars, based on a cross-correlation of wide area near-infrared surveys (2MASS, SDSS, and SIMP). An astrometric follow-up, for common proper motion confirmation, was made with SIMON and/or CPAPIR at the Observatoire du Mont Mégantic 1.6 m and CTIO 1.5 m telescopes for all the candidates identified. A spectroscopic follow-up was also made with GMOS or GNIRS at Gemini to determine the spectral types of 11 of our newly identified companions and 10 of our primaries. Statistical arguments are provided to show that all of the systems we report here are very likely to be physical binaries. One of the new systems reported features a brown dwarf companion: LSPM J1259+1001 (M5) has an L4.5 (2M1259+1001) companion at ∼340 AU. This brown dwarf was previously unknown. Seven other systems have a companion of spectral type L0–L1 at a separation in themore » 250–7500 AU range. Our sample includes 14 systems with a mass ratio below 0.3.« less

Authors:
; ; ; ; ; ;  [1];  [2];  [3];  [4]
  1. Département de Physique, Université de Montréal, C.P. 6128 Succ. Centre-ville, Montréal, Qc H3C 3J7 (Canada)
  2. Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30303 (United States)
  3. Canada-France-Hawaii Telescope, 65–1238 Mamalahoa Hwy, Kamuela, HI 96743 (United States)
  4. Institut Utinam, CNRS UMR6213, Université de Franche-Comté, OSU THETA Franche-Comté-Bourgogne, Observatoire de Besançon, BP 1615, F-25010 Besançon Cedex (France)
Publication Date:
OSTI Identifier:
22522026
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 802; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BINARY STARS; CORRELATIONS; DWARF STARS; INFRARED SURVEYS; MASS; NEAR INFRARED RADIATION; PROPER MOTION; TELESCOPES

Citation Formats

Baron, Frédérique, Lafrenière, David, Artigau, Étienne, Doyon, René, Gagné, Jonathan, Robert, Jasmin, Nadeau, Daniel, Davison, Cassy L., Malo, Lison, and Reylé, Céline, E-mail: baron@astro.umontreal.ca. DISCOVERY AND CHARACTERIZATION OF WIDE BINARY SYSTEMS WITH A VERY LOW MASS COMPONENT. United States: N. p., 2015. Web. doi:10.1088/0004-637X/802/1/37.
Baron, Frédérique, Lafrenière, David, Artigau, Étienne, Doyon, René, Gagné, Jonathan, Robert, Jasmin, Nadeau, Daniel, Davison, Cassy L., Malo, Lison, & Reylé, Céline, E-mail: baron@astro.umontreal.ca. DISCOVERY AND CHARACTERIZATION OF WIDE BINARY SYSTEMS WITH A VERY LOW MASS COMPONENT. United States. doi:10.1088/0004-637X/802/1/37.
Baron, Frédérique, Lafrenière, David, Artigau, Étienne, Doyon, René, Gagné, Jonathan, Robert, Jasmin, Nadeau, Daniel, Davison, Cassy L., Malo, Lison, and Reylé, Céline, E-mail: baron@astro.umontreal.ca. Fri . "DISCOVERY AND CHARACTERIZATION OF WIDE BINARY SYSTEMS WITH A VERY LOW MASS COMPONENT". United States. doi:10.1088/0004-637X/802/1/37.
@article{osti_22522026,
title = {DISCOVERY AND CHARACTERIZATION OF WIDE BINARY SYSTEMS WITH A VERY LOW MASS COMPONENT},
author = {Baron, Frédérique and Lafrenière, David and Artigau, Étienne and Doyon, René and Gagné, Jonathan and Robert, Jasmin and Nadeau, Daniel and Davison, Cassy L. and Malo, Lison and Reylé, Céline, E-mail: baron@astro.umontreal.ca},
abstractNote = {We report the discovery of 14 low-mass binary systems containing mid-M to mid-L dwarf companions with separations larger than 250 AU. We also report the independent discovery of nine other systems with similar characteristics that were recently discovered in other studies. We have identified these systems by searching for common proper motion sources in the vicinity of known high proper motion stars, based on a cross-correlation of wide area near-infrared surveys (2MASS, SDSS, and SIMP). An astrometric follow-up, for common proper motion confirmation, was made with SIMON and/or CPAPIR at the Observatoire du Mont Mégantic 1.6 m and CTIO 1.5 m telescopes for all the candidates identified. A spectroscopic follow-up was also made with GMOS or GNIRS at Gemini to determine the spectral types of 11 of our newly identified companions and 10 of our primaries. Statistical arguments are provided to show that all of the systems we report here are very likely to be physical binaries. One of the new systems reported features a brown dwarf companion: LSPM J1259+1001 (M5) has an L4.5 (2M1259+1001) companion at ∼340 AU. This brown dwarf was previously unknown. Seven other systems have a companion of spectral type L0–L1 at a separation in the 250–7500 AU range. Our sample includes 14 systems with a mass ratio below 0.3.},
doi = {10.1088/0004-637X/802/1/37},
journal = {Astrophysical Journal},
number = 1,
volume = 802,
place = {United States},
year = {Fri Mar 20 00:00:00 EDT 2015},
month = {Fri Mar 20 00:00:00 EDT 2015}
}