Results 91 to 100 of about 3,207 (171)

Stellar Spin-down in Post-mass-transfer Binary Systems

The Astrophysical Journal
Motivated by measurements of the rotation speed of accretor stars in post-mass-transfer (post-MT) systems, we investigate how magnetic braking affects the spin-down of individual stars during binary evolution with the MESAbinary module.
Meng Sun, Seth Gossage, Emily M. Leiner, Aaron M. Geller   +3 more
doaj   +1 more source

Analysis of Two Binary Stars and a Blue Straggler in Messier 67

, 2021
We report on the detailed analysis of three candidate blue straggler stars, S277, S997, and S1031, in the old open cluster M67 (NGC 2682), based on observations made with the high resolution Immersion GRating INfrared Spectrograph (IGRINS) at the McDonald Observatory 2.7m telescope at a resolving power of R~45,000.
Christopher Sneden, Greg Mace, Natalie M. Gosnell, Kristin Brady, C. A. Pilachowski, Richard Seifert, Daniel T. Jaffe   +6 more
openaire   +2 more sources

The Impact of Stellar Rotations and Binaries on the Shape of Upper Main Sequence near Turnoff in Open Cluster NGC 6067

The Astrophysical Journal
We present the analysis of the extended main-sequence turnoff (eMSTO) in the open cluster NGC 6067. We derive the projected rotational velocity, v sin i , of the stars belonging to the eMSTO region of the main sequence (MS) utilizing Gaia-ESO spectra ...
Jayanand Maurya, Yu Zhang, Sebastian Kamann, Hubiao Niu, Yves Frémat, Kaixiang Lang, Y. C. Joshi, M. R. Samal, Peter De Cat, Ali Esamdin   +9 more
doaj   +1 more source

A new, Gaia-based, catalogue of blue straggler stars in open clusters [PDF]

, 2021
M. J. Rain, J. A. Ahumada, G. Carraro
openalex   +1 more source

Discovery of a Barium Blue Straggler Star in M67 and “Sighting” of Its White Dwarf Companion

The Astrophysical Journal Letters
We report the discovery of a barium blue straggler star (BSS) in M67, exhibiting enhancements in slow neutron-capture ( s -)process elements. Spectroscopic analysis of two BSSs (WOCS 9005 & WOCS 1020) and four stars located near the main-sequence turn ...
Harshit Pal, Annapurni Subramaniam, Arumalla B. S. Reddy, Vikrant V. Jadhav   +3 more
doaj   +1 more source

Star Formation History and Chemical Evolution of the Sextans Dwarf Spheroidal Galaxy

, 2009
We present the star formation history and chemical evolution of the Sextans dSph dwarf galaxy as a function of galactocentric distance. We derive these from the $VI$ photometry of stars in the $42' \times 28'$ field using the SMART model developed by Yuk
Carrea, Da Costa, Demarque, Dennis Zaritsky, Dolphin, Fenner, Geisler, Harbeck, Hong Soo Park, In-Soo Yuk, Irwin, Irwin, Jason Harris, Kawata, Komatsu, Lee, Matteucci, Matteucci, Myung Gyoon Lee, Ricotti, Rizzi, Shetrone, Shetrone, Sills, Tolstoy, Tolstoy, Yi, Yuk   +27 more
core   +2 more sources

Blue straggler stars in open clusters using Gaia: dependence on cluster parameters and possible formation pathways [PDF]

, 2021
Vikrant V. Jadhav, Annapurni Subramaniam
openalex   +1 more source

Blue Straggler Formation in Clusters

, 2010
Blue stragglers are thought to be formed from the merger or coalescence of two stars, but the details of their formation in clusters has been difficult to disentangle.
Sills, Alison
core   +1 more source

Could the number of blue straggler stars help to determine the age of their parent globular cluster? [PDF]

, 2023
F. Llorente de Andrés
openalex   +1 more source

Wind Roche-lobe Overflow in Low-mass Binaries: Exploring the Origin of Rapidly Rotating Blue Lurkers

The Astrophysical Journal
Wind Roche-lobe overflow (WRLOF) is a mass-transfer mechanism proposed by Mohamed and Podsiadlowski for stellar binaries wherein the wind acceleration zone of the donor star exceeds its Roche-lobe radius, allowing stellar wind material to be transferred ...
Meng Sun, Sasha Levina, Seth Gossage, Vicky Kalogera, Emily M. Leiner, Aaron M. Geller, Zoheyr Doctor   +6 more
doaj   +1 more source