Results 101 to 110 of about 22,863 (213)

Infrared emission from protostars

The Astrophysical Journal, 1985
The emergent spectral energy distribution at infrared to radio wavelengths is calculated for the simplest theoretical construct of a low-mass protostar. It is shown that the emergent spectrum in the infrared is insensitive to the details assumed for the temperature profile as long as allowance is made for a transition from optically thick to optically ...
F. C. Adams, F. H. Shu
openaire   +1 more source

Protostellar Disk Formation Regimes: Angular Momentum Conservation versus Magnetic Braking

The Astrophysical Journal Letters
Protostellar disks around young protostars exhibit diverse properties, with their radii ranging from less than ten to several hundred astronomical units.
Hsi-Wei Yen, Yueh-Ning Lee
doaj   +1 more source

IPA: Class 0 Protostars Viewed in CO Emission Using JWST

The Astrophysical Journal
We investigate the bright CO fundamental emission in the central regions of five protostars in their primary mass assembly phase using new observations from JWST’s Near-Infrared Spectrograph and Mid-Infrared Instrument. CO line emission images and fluxes
Adam E. Rubinstein, Neal J. Evans II, Himanshu Tyagi, Mayank Narang, Pooneh Nazari, Robert Gutermuth, Samuel Federman, P. Manoj, Joel D. Green, Dan M. Watson, S. Thomas Megeath, Will R. M. Rocha, Nashanty G. C. Brunken, Katerina Slavicinska, Ewine F. van Dishoeck, Henrik Beuther, Tyler L. Bourke, Alessio Caratti o Garatti, Lee Hartmann, Pamela Klaassen, Hendrik Linz, Leslie W. Looney, James Muzerolle, Thomas Stanke, John J. Tobin, Scott J. Wolk, Yao-Lun Yang   +26 more
doaj   +1 more source

Theory of Disk Accretion onto Magnetic Stars

EPJ Web of Conferences, 2014
Disk accretion onto magnetic stars occurs in a variety of systems, including accreting neutron stars (with both high and low magnetic fields), white dwarfs, and protostars.
Lai Dong
doaj   +1 more source

CORINOS. II. JWST-MIRI Detection of Warm Molecular Gas from an Embedded, Disk-bearing Protostar

The Astrophysical Journal
We present James Webb Space Telescope (JWST) Mid-InfraRed Instrument (MIRI) observations of warm CO and H _2 O gas in emission toward the low-mass protostar IRAS 15398-3359, observed as part of the CORINOS program.
Colette Salyk, Yao-Lun Yang, Klaus M. Pontoppidan, Jennifer B. Bergner, Yuki Okoda, Jaeyeong Kim, Neal J. Evans II, Ilsedore Cleeves, Ewine F. van Dishoeck, Robin T. Garrod, Joel D. Green   +10 more
doaj   +1 more source

Search for Binary Protostars

, 2000
In an effort to shed more light on the formation process of binary stars, we have started a program to study multiplicity among nearby low- and intermediate-mass protostars using the OVRO Millimeter Array. Here, we describe the project and present the first results on the protostellar core in the Bok globule CB230 (L1177).
Launhardt, R., Sargent, A. I., Zinnecker, H.   +2 more
openaire   +2 more sources

First Detection of CH3OD in Prestellar Cores

The Astrophysical Journal
The isotopic ratios of deuterated methanol derived around protostars are commonly used to infer the physical conditions under which they formed in the earlier prestellar stage.
Beatrice M. Kulterer, Asunción Fuente, Maria N. Drozdovskaya, Silvia Spezzano, Gisela Esplugues, David Navarro-Almaida, Marina Rodríguez Baras, Angèle Taillard, Karin Öberg   +8 more
doaj   +1 more source

Identification of solid N2O in interstellar ices using open JWST data

Astronomy & Astrophysics
Context. Only six molecules containing an N-O bond are detected in the gaseous phase of the interstellar medium. One of them is nitrous oxide (N2O), which was unsuccessfully searched for in solid form since the launch of the Infrared Space Observatory ...
Karteyeva V., Nakibov R., Petrashkevich I., Medvedev M., Vasyunin A.   +4 more
doaj   +1 more source

Effect of Magnetic Field on the Accretion Phase of Population III Star Formation

The Astrophysical Journal
We examine the impact of the magnetic field on Population III star formation by varying its strength. We perform simulations with magnetic field strengths ranging from 10 ^−20 G to 10 ^−4 G, in addition to a model without a magnetic field.
Masahiro N. Machida, Shingo Hirano, Shantanu Basu   +2 more
doaj   +1 more source

A Comparison of Presolar Isotopic Signatures in Laboratory-Studied Primitive Solar System Materials and Comet 67P/Churyumov-Gerasimenko: New Insights from Light Elements, Halogens, and Noble Gases. [PDF]

Space Sci Rev, 2023
Hoppe P, Rubin M, Altwegg K.
europepmc   +1 more source