D. M. Rowan

Spectroscopic follow-up of compact object binary candidates from Gaia DR3: White dwarfs, neutron stars, black holes, and the parallax zeropoint

Kareem El-Badry, David W. Latham, Hans-Walter Rix, Allyson Bieryla et autres

Astrometry and radial velocities (RVs) from Gaia DR3 yielded orbits for hundreds of thousands of binary systems, including several samples proposed to contain black holes (BHs), neutron stars (NSs), and white dwarfs (WDs). We present results of a systematic spectroscopic follow-up program …

Spectroscopic follow-up of compact object binary candidates from Gaia DR3: White dwarfs, neutron stars, black holes, and the parallax zeropoint

Kareem El-Badry, David W. Latham, Hans-Walter Rix, Allyson Bieryla et autres

Astrometry and radial velocities (RVs) from Gaia DR3 yielded orbits for hundreds of thousands of binary systems, including several samples proposed to contain black holes (BHs), neutron stars (NSs), and white dwarfs (WDs). We present results of a systematic spectroscopic follow-up program …

us, dk, de, il (code pays fourni par la source)

Young High-alpha dwarf stars

Yuxi Lu, Catherine Manea, McKenzie Madeleine, Maryum Sayeed et autres

us, de, au (code pays fourni par la source)

Young High-alpha dwarf stars

Yuxi Lu, Catherine Manea, McKenzie Madeleine, Maryum Sayeed et autres

us, de, au (code pays fourni par la source)

Hidden in Plain Sight: Searching for Dark Companions to Bright Stars with the Large Binocular Telescope and SHARK-VIS

D. M. Rowan, Todd A. Thompson, C. S. Kochanek, Gianluca Li Causi et autres

We report the results from a pilot study to search for black holes and other dark companions in binary systems using direct imaging with SHARK-VIS and the iLocater pathfinder "Lili" on the Large Binocular Telescope. Starting from known single-lined spectroscopic binaries, we …

The Galactic Center with Roman

Sean K. Terry, Matthew W. Hosek, Jessica R. Lu, Casey Y. Lam et autres

We advocate for a Galactic center (GC) field to be added to the Galactic Bulge Time Domain Survey (GBTDS). The new field would yield high-cadence photometric and astrometric measurements of an unprecedented ${\sim}$3.3 million stars toward the GC. This would enable a …

fr (code pays fourni par la source)

Roman CCS White Paper: Characterizing the Galactic population of isolated black holes

Casey Y. Lam, Natasha S. Abrams, Jeff J. Andrews, E. Bachelet et autres

Although there are estimated to be 100 million isolated black holes (BHs) in the Milky Way, only one has been found so far, resulting in significant uncertainty about their properties. The Galactic Bulge Time Domain Survey provides the only opportunity in the …

us, de, ua, it, ca, au, gb, jp, pl, fr, nl (code pays fourni par la source)

The Value-Added Catalog of ASAS-SN Eclipsing Binaries III: Masses and Radii of Gaia Spectroscopic Binaries

D. M. Rowan, T. Jayasinghe, K. Z. Stanek, C. S. Kochanek et autres

Masses and radii of stars can be derived by combining eclipsing binary light curves with spectroscopic orbits. In our previous work, we modeled the All-Sky Automated Survey for Supernovae (ASAS-SN) light curves of more than 30,000 detached eclipsing binaries using PHOEBE. Here …

The Value-Added Catalog of ASAS-SN Eclipsing Binaries II: Properties of Extra-Physics Systems

D. M. Rowan, T. Jayasinghe, K. Z. Stanek, C. S. Kochanek et autres

Detached eclipsing binaries are the primary tool used to measure precise masses and radii of stars. In our previous paper estimating the parameters of more than 30,000 detached eclipsing binaries, we identified 766 eclipsing binaries with additional features in their All-Sky Automated …