Results 31 to 40 of about 40,509 (299)

A Census of the Taurus Star-forming Region and Neighboring Associations with Gaia

The Astronomical Journal, 2023
I have used high-precision photometry and astrometry from the third data release of Gaia to perform a survey for members of the Taurus star-forming region and young associations in its vicinity. This work has produced a new catalog of 532 adopted members
K. L. Luhman
doaj   +1 more source

Mapping the Recent Star Formation History of the Disk of M51

, 2010
Using data acquired as part of a unique Hubble Heritage imaging program of broadband colors of the interacting spiral system M51/NGC 5195, we have conducted a photometric study of the stellar associations across the entire disk of the galaxy in order to ...
Brown, Catherine Kaleida, de Vaucouleurs, Elmegreen, Feldmeier, Hernquist, Hwang, Lamers, Lee, Mink, Mink, Mutchler, Papovich, Paul A. Scowen, Rey, Sandage, Schlegel, Scoville, Whitmore, Úbeda   +19 more
core   +1 more source

Feedback from massive stars and gas expulsion from proto-globular clusters [PDF]

, 2015
© 2015. The American Astronomical Society. All rights reserved. Globular clusters (GCs) are considerably more complex structures than previously thought, harboring at least two stellar generations that present clearly distinct chemical abundances ...
Calura, F., D'Ercole, A., Few, C. G., Romano, D.   +3 more
core   +3 more sources

The distinction between star clusters and associations

, 2010
In Galactic studies a distinction is made between (open) star clusters and associations. For barely resolved objects at a distance of several Mpc this distinction is not trivial to make. Here we provide an objective definition by comparing the age of the
Ambartsumian, Blaauw, Bressert, Elmegreen, Gieles, Gieles, Kroupa, Lada, Mark Gieles, Portegies Zwart, Simon F. Portegies Zwart   +10 more
core   +1 more source

Kinematic Age of the β-Pictoris Moving Group

The Astrophysical Journal
Accurate age estimation of nearby young moving groups (NYMGs) is important as they serve as crucial testbeds in various fields of astrophysics, including the formation and evolution of stars and planets, as well as loose stellar associations.
Jinhee Lee, Inseok Song
doaj   +1 more source

The Power of Asteroseismology for Early Stellar Evolution

Frontiers in Astronomy and Space Sciences, 2019
Stars are the building blocks of planetary systems, clusters, associations, and galaxies. The evolution of stars is driven by physical processes in their interiors making theory of stellar interior structure and evolution an important ingredient of ...
Konstanze Zwintz
doaj   +1 more source

A Critical Examination of Hypernova Remnant Candidates in M101. II. NGC 5471B [PDF]

, 2002
NGC 5471B has been suggested to contain a hypernova remnant because of its extraordinarily bright X-ray emission. To assess its true nature, we have obtained high-resolution images in continuum bands and nebular lines with the Hubble Space Telescope, and
C.-H. Rosie Chen, Chu Y.-H., Q. Daniel Wang, Robert Gruendl, Schaerer D., Shih-Ping Lai, You-Hua Chu   +6 more
core   +4 more sources

Mass Outflows Associated with Young Stellar Objects [PDF]

Symposium - International Astronomical Union, 1987
The fundamental properties of optical and molecular outflows associated with young stellar objects are reviewed. Particular emphasis is placed on a discussion of new results concerning outflow energetics, collimating structures and the relationship between outflow properties and the magnetic field geometry characterizing their host molecular clouds ...
Stephen E. Strom, Karen M. Strom
openaire   +1 more source

A Quality Improvement Initiative to Standardize Pneumocystis jirovecii Pneumonia Prophylaxis in Pediatric Patients With Solid Tumors

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Pediatric patients with extracranial solid tumors (ST) receiving chemotherapy are at an increased risk for Pneumocystis jirovecii pneumonia (PJP). However, evidence guiding prophylaxis practices in this population is limited. A PJP‐related fatality at our institution highlighted inconsistent prescribing approaches and concerns about
Kriti Kumar, Denise M. Connolly, Ellen Kellington, Elyse Zelunka, Karla Kerrigan, Furqan Shaikh, Paul C. Nathan, Meredith S. Irwin, Sarah Cohen‐Gogo   +8 more
wiley   +1 more source

Kinematic Ages of the Tucana–Horologium, Columba, and Carina Associations

The Astrophysical Journal
The traceback method allows the computation of the kinematic age of nearby young associations from astrometric and kinematic data alone, circumventing the need for stellar evolution models.
Dominic Couture, Jonathan Gagné, René Doyon   +2 more
doaj   +1 more source