Results 151 to 160 of about 4,213,215 (189)

A Faint Progenitor System for the Faint Supernova 2024vjm

open access: yes
Zimmerman E   +69 more
europepmc   +1 more source

SHARP Images of Young Stellar Objects

Astrophysics and Space Science, 1995
We present high resolution infrared images of the pre-main sequence star V536 Aql and polarization maps of the reflection nebula IRN Cha observed with the SHARP camera on the ESO NTT. Extended structures are observed near V536 Aql. The polarization pattern of IRN Cha is typical of a centrally illuminated source but with a central band of anomalously ...
N. Ageorges, A. Eckart, R. Hofmann
openaire   +1 more source

Oscillations in Young Stellar Objects

International Astronomical Union Colloquium, 2002
AbstractWe report the discovery of periodicities in the light curve of the Herbig Ae star V346 Ori. We interpret these variations as the superposition of at least two signals with periods P1=42±6 min and P2=68±12 min resulting from stellar oscillations.
F.J.G. Pinheiro   +5 more
openaire   +1 more source

Chemical evolution of circumstellar matter around young stellar objects

open access: yesAstrophysics and Space Science, 1995
Recent observational studies of the chemical composition of circumstellar matter around both high- and low-mass young stellar objects are reviewed. The molecular abundances are found to be a strong function of evolutionary state, but not of system mass ...
Ewine van Dishoeck   +2 more
exaly   +2 more sources

Observations of Young Stellar Objects

1988
After a brief description of the main properties of embedded protostellar sources, I investigate in some detail the hypothesis that CO bipolar flows are pushed by winds emanating from the infrared central sources associated with the molecular outflows.
openaire   +1 more source

Evolution of Young Stellar Objects

2012
This chapter decribes the evolution of stellar objects after the PMF phase when a young stellar object forms via accretion from its circumstellar cloud. It is difficult, if not impossible, to draw a line between the process of protostellar formation and the evolution of a protostar toward a mature star on the main sequence.
openaire   +1 more source

IRAS Colours of Young Stellar Objects

Publications of the Astronomical Society of Australia, 1991
AbstractThe effects of including low quality IRAS flux data in colour-colour diagrams is investigated, with a view to identifying Young Stellar Objects from the IRAS database. Colour criteria to perform this task are derived.
M. Suters, W. Zealey
openaire   +1 more source

Infrared spectra of young stellar objects

2008
We present models of the spectral energy distributions for an evolutionary sequence of young stellar objects, from protostars to pre-main-sequence stars. The protostellar theory, characterized by a central star and disk embedded within an infalling envelope of dust and gas, can explain the observed infrared spectra of embedded IRAS sources associated ...
Fred C. Adams, Frank H. Shu
openaire   +1 more source

Young stellar objects in groups.

1994
The authors present four groups which contain several massive young objects in different evolutionary states, mainly Herbig Ae/Be stars and compact H II regions. They try to ascertain the exact nature of the components of the group, via photometry and spectroscopy. This study is illustrated by the case of AFGL 4029.
Deharveng, L.   +2 more
openaire   +1 more source

Disks around young stellar objects

Pramana, 2011
By 1939, when Chandrasekhar’s classic monograph on the theory of Stellar Structure was published, although the need for recent star formation was fully acknowledged, no one had yet recognized an object that could be called a star in the process of being born.
openaire   +1 more source

Home - About - Disclaimer - Privacy