Zobrazeno 1 - 10
of 245
pro vyhledávání: '"Mathieu, Robert D."'
Publikováno v:
The Astronomical Journal, 168(5), 205 (2024)
NGC 2506 is a rich, intermediate-age (2.0 Gyr), metal-poor ([Fe/H] $\sim$ -0.2) open cluster. This work presents the results of 12,157 spectroscopic radial-velocity measurements of 2,442 stars in the NGC 2506 field over 41 years, made as part of the
Externí odkaz:
http://arxiv.org/abs/2410.18189
We investigate barium (Ba) abundances in blue straggler stars (BSSs) in two open clusters, NGC 7789 (1.6 Gyr) and M67 (4 Gyr), as signatures of asymptotic-giant-branch (AGB) mass transfer. We combine our findings with previous Ba abundance analyses i
Externí odkaz:
http://arxiv.org/abs/2405.20242
Autor:
Stassun, Keivan G., Torres, Guillermo, Kounkel, Marina, Tofflemire, Benjamin M., Leiner, Emily, Feliz, Dax L., Dixon, Don M., Mathieu, Robert D., Gosnell, Natalie, Gully-Santiago, Michael
We report the discovery of 2M0056-08 as an equal-mass eclipsing binary (EB), comprising two red straggler stars (RSSs) with an orbital period of 33.9 d. Both stars have masses of 1.419 Msun, identical to within 0.2%. Both stars appear to be in the ea
Externí odkaz:
http://arxiv.org/abs/2305.00134
We present the results of our Hubble Space Telescope far-ultraviolet survey of the blue lurkers (BLs) in M67. We find evidence for two white dwarf companions among the BLs that are indicative of mass transfer from an evolved companion, one in WOCS 14
Externí odkaz:
http://arxiv.org/abs/2301.02303
Autor:
Sun, Meng, Mathieu, Robert D.
WOCS 4540 is the longest orbital period ($P_{\rm orb}=3030$ days) blue straggler (BSS) - white dwarf (WD) pair in the old open cluster NGC 188 . It also contains one of the most luminous BSS in the cluster. Prior \textit{Hubble Space Telescope} COS s
Externí odkaz:
http://arxiv.org/abs/2212.10761
Autor:
Geller, Aaron M., Mathieu, Robert D., Latham, David W., Pollack, Maxwell, Torres, Guillermo, Leiner, Emily M.
We present and analyse 120 spectroscopic binary and triple cluster members of the old (4 Gyr) open cluster M67 (NGC 2682). As a cornerstone of stellar astrophysics, M67 is a key cluster in the WIYN Open Cluster Study (WOCS); radial-velocity (RV) obse
Externí odkaz:
http://arxiv.org/abs/2101.07883
The blue-straggler binary WOCS 5379 is a member of the old (6-7 Gyr) open cluster NGC 188. WOCS 5379 comprises a blue straggler star with a white dwarf companion in a 120-day eccentric orbit. Combined with the orbital period, this helium white dwarf
Externí odkaz:
http://arxiv.org/abs/2012.08502
Autor:
Sandquist, Eric L., Latham, David W., Mathieu, Robert. D., Leiner, Emily, Vanderburg, Andrew, Stello, Dennis, Orosz, Jerome A., Bedin, Luigi R., Libralato, Mattia, Malavolta, Luca, Nardiello, Domenico
We present a study of the bright detached eclipsing main sequence binary WOCS 11028 (Sanders 617) in the open cluster M67. Although the binary has only one eclipse per orbital cycle, we show that the masses of the stars can be derived very precisely
Externí odkaz:
http://arxiv.org/abs/2011.08365
We present higher-order multiplicity results for 60 solar-type spectroscopic binaries based on 0.75 micron imaging data taken by the Robotic Adaptive Optics system (Robo-AO) at the Kitt Peak 2.1m telescope. Our contrast curves show sensitivity of up
Externí odkaz:
http://arxiv.org/abs/2009.00575
Autor:
Nine, Andrew C., Milliman, Katelyn E., Mathieu, Robert D., Geller, Aaron M., Leiner, Emily M., Platais, Imants, Tofflemire, Benjamin M.
We introduce the stellar sample of the WIYN Open Cluster Study radial-velocity survey for the rich open cluster NGC 7789 (1.6 Gyr, [Fe/H] = +0.02). This sample lies within an 18$'$ circular radius from the cluster center (10 pc in projection, or abou
Externí odkaz:
http://arxiv.org/abs/2003.09732