Embedded binaries and their dense cores

@article{Sadavoy2017EmbeddedBA,
  title={Embedded binaries and their dense cores},
  author={Sarah I. Sadavoy and Steven William Stahler},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2017},
  volume={469},
  pages={3881-3900}
}
  • S. SadavoyS. Stahler
  • Published 28 April 2017
  • Physics
  • Monthly Notices of the Royal Astronomical Society
We explore the relationship between young, embedded binaries and their parent cores, using observations within the Perseus Molecular Cloud. We combine recently published VLA observations of young stars with core properties obtained from SCUBA-2 observations at 850 um. Most embedded binary systems are found toward the centres of their parent cores, although several systems have components closer to the core edge. Wide binaries, defined as those systems with physical separations greater than 500… 

The bridge: a transient phenomenon of forming stellar multiples

Context. Observations with modern instruments such as Herschel reveal that stars form clustered inside filamentary arms of ~1 pc length embedded in giant molecular clouds (GMCs). On smaller scales of

Characterizing young protostellar disks with the CALYPSO IRAM-PdBI survey: large Class 0 disks are rare

Context. Understanding the formation mechanisms of protoplanetary disks and multiple systems and also their pristine properties are key questions for modern astrophysics. The properties of the

On the initial binary population for star cluster simulations

Colour–magnitude diagrams (CMDs) are powerful tools that might be used to infer stellar properties in globular clusters (GCs), for example, the binary fraction and their mass ratio (q) distribution.

Multiplicity and clustering in Taurus star forming region

Context. Multiplicity and clustering of young pre-main sequence stars appear as critical clues to understand and constrain the star formation process. Taurus is the archetypical example of the most

The VLA/ALMA Nascent Disk and Multiplicity (VANDAM) Survey of Perseus Protostars. VI. Characterizing the Formation Mechanism for Close Multiple Systems

We present Atacama Large Millimeter/submillimeter Array observations of multiple protostar systems in the Perseus molecular cloud, previously detected by the Karl G. Jansky Very Large Array. We

The Case for an Early Solar Binary Companion

We show that an equal-mass, temporary binary companion to the Sun in the solar birth cluster at a separation of ∼103 au would have increased the likelihood of forming the observed population of outer

Architecture of Hierarchical Stellar Systems and Their Formation

Accumulation of new data on stellar hierarchical systems and the progress in numerical simulations of their formation open the door to genetic classification of these systems, where properties of a

The VLA/ALMA Nascent Disk And Multiplicity (VANDAM) Survey of Orion Protostars. V. A Characterization of Protostellar Multiplicity

We characterize protostellar multiplicity in 20 Current address: Niels Bohr Institute, University of Copenhagen, Øster Voldgade 5–7, DK-1350, Copenhagen K, Denmark. the Orion molecular clouds using

Dust Polarization toward Embedded Protostars in Ophiuchus with ALMA. III. Survey Overview

We present 0.″25 resolution (35 au) ALMA 1.3 mm dust polarization observations for 37 young stellar objects (YSOs) in the Ophiuchus molecular cloud. These data encompass all the embedded protostars

Role of environment and gas temperature in the formation of multiple protostellar systems: molecular tracers

Context. Simulations suggest that gas heating due to radiative feedback is a key factor in whether or not multiple protostellar systems will form. Chemistry is a good tracer of the physical structure

References

SHOWING 1-10 OF 90 REFERENCES

PRIMORDIAL CIRCUMSTELLAR DISKS IN BINARY SYSTEMS: EVIDENCE FOR REDUCED LIFETIMES

We combine the results from several multiplicity surveys of pre-main-sequence stars located in four nearby star-forming regions with Spitzer data from three different Legacy Projects. This allows us

Inverse dynamical population synthesis: Constraining the initial conditions of young stellar clusters by studying their binary populations

Binary populations in young star clusters show multiplicit y fractions both lower and up to twice as high as those observed in the Galactic field. We follow the evolution of a population of bin ary

Do binaries in clusters form in the same way as in the field

We examine the dynamical destruction of binary systems in star clusters of different densities. We find that at high densities (10 4 -10 5 M ⊙ pc -3 ) almost all binaries with separations > 10 3 au

THE EVOLUTION OF THE MULTIPLICITY OF EMBEDDED PROTOSTARS. I. SAMPLE PROPERTIES AND BINARY DETECTIONS

We present the observational results of a near-infrared survey of a large sample of Class I protostars designed to determine the Class I binary separation distribution from ∼100 AU to ∼5000 AU. We

The formation of close binary systems by dynamical interactions and orbital decay

We present results from the first hydrodynamical star formation calculation to demonstrate that close binary stellar systems (separations 10 au) need not be formed directly by fragmentation. Instead,

Current Star Formation in the Perseus Molecular Cloud: Constraints from Unbiased Submillimeter and Mid-Infrared Surveys

We present a census of the population of deeply embedded young stellar objects (YSOs) in the Perseus molecular cloud complex based on a combination of Spitzer Space Telescope mid-infrared data from

Shapes of Molecular Cloud Cores and the Filamentary Mode of Star Formation

Using recent dust continuum data, we generate the intrinsic ellipticity distribution of dense, starless molecular cloud cores. Under the hypothesis that the cores are all either oblate or prolate

The orbital decay of embedded binary stars

Young binaries within dense molecular clouds are subject to dynamical friction from ambient gas. Consequently, their orbits decay, with both the separation and period decreasing in time. A simple

Physical properties of dense cores in Orion B9

Aims. We aim to determine the physical and chemical properties of the starless and protostellar cores in Orion B9, which represents a relatively quiescent star-forming region in Orion B. Methods. We
...