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New Constraints on the Future Evaporation of the Young Exoplanets in the V1298 Tau System
Sozzetti, A.; Micela, G.; Damasso, M. +7 more
Transiting planets at young ages are key targets for improving our understanding of the evolution of exo-atmospheres. We present results of a new X-ray observation of V 1298 Tau with XMM-Newton, aimed to determine more accurately the high-energy irradiation of the four planets orbiting this pre-main-sequence star, and the possible variability due …
Stellar mass segregation as separating classifier between globular clusters and ultrafaint dwarf galaxies
Hilker, M.; Baumgardt, H.; Faller, J. +2 more
We have determined the amount of stellar mass segregation in over 50 globular clusters and ultrafaint dwarf galaxy candidates based on deep HST- and ground-based photometry. We find that the amount of mass segregation in globular clusters is strongly correlated with their relaxation time and that all clusters with relaxation times of the order of …
Identifying blue large amplitude pulsators from Gaia DR2 and ZTF DR3
Lam, Marco C.; McWhirter, Paul Ross
Blue large amplitude pulsators (BLAPs) are hot, subluminous stars undergoing rapid variability with periods of under 60 min. They have been linked with the early stages of pre-white dwarfs and hot subdwarfs. They are a rare class of variable star due to their evolutionary history within interacting binary systems and the short time-scales relative…
The Star-forming Main Sequence of the Host Galaxies of Low-redshift Quasars
Ho, Luis C.; Zhuang, Ming-Yang
We investigate the star-forming main sequence of the host galaxies of a large, well-defined sample of 453 redshift ~0.3 quasars with previously available star formation rates by deriving stellar masses from modeling their broadband (grizy) spectral energy distribution. We perform two-dimensional, simultaneous, multi-filter decomposition of Pan-STA…
Inhomogeneity in the Local ISM and Its Relation to the Heliosphere
Redfield, Seth; Linsky, Jeffrey; Ryder, Diana +1 more
This paper reviews past research and new studies underway of the local interstellar environment and its changing influence on the heliosphere. The size, shape, and physical properties of the heliosphere outside of the heliopause are determined by the surrounding environment - now the outer region of the Local Interstellar Cloud (LIC). The temperat…
Blanco DECam Bulge Survey (BDBS) IV: Metallicity distributions and bulge structure from 2.6 million red clump stars
Clarkson, William I.; Rich, R. Michael; Kunder, Andrea +12 more
We present photometric metallicity measurements for a sample of 2.6 million bulge red clump stars extracted from the Blanco DECam Bulge Survey (BDBS). Similar to previous studies, we find that the bulge exhibits a strong vertical metallicity gradient, and that at least two peaks in the metallicity distribution functions appear at b < -5°. We ca…
A 62-minute orbital period black widow binary in a wide hierarchical triple
Kulkarni, S. R.; Duev, Dmitry A.; Riddle, Reed +30 more
Over a dozen millisecond pulsars are ablating low-mass companions in close binary systems. In the original `black widow', the eight-hour orbital period eclipsing pulsar PSR J1959+2048 (PSR B1957+20)1, high-energy emission originating from the pulsar2 is irradiating and may eventually destroy3 a low-mass companion. …
Zodiacal exoplanets in time - XIII. Planet orbits and atmospheres in the V1298 Tau system, a keystone in studies of early planetary evolution
Kuzuhara, M.; Tamura, M.; Kudo, T. +16 more
Studies of planetary systems of stars in star-forming regions and young clusters open a window on the formative stages of planetary evolution. We obtained high-cadence high-resolution infrared spectroscopy of the solar-mass Taurus association-member V1298 Tau during a transit of its 10R⊕-size 'b' planet. We measured the systemic radial …
CLEAR: Boosted Lyα Transmission of the Intergalactic Medium in UV-bright Galaxies
Papovich, Casey; Finkelstein, Steven L.; Cleri, Nikko J. +11 more
Reionization is an inhomogeneous process, thought to begin in small ionized bubbles of the intergalactic medium (IGM) around overdense regions of galaxies. Recent Lyα studies during the epoch of reionization show evidence that ionized bubbles formed earlier around brighter galaxies, suggesting higher IGM transmission of Lyα from these galaxies. We…
Kinematics beats dust: unveiling nested substructure in the perturbed outer disc of the Milky Way
Laporte, Chervin F. P.; Belokurov, Vasily; Koposov, Sergey E.
We use the Gaia eDR3 data and legacy spectroscopic surveys to map the Milky Way disc substructure towards the Galactic Anticentre at heliocentric distances $d\ge 10\, \rm {kpc}$. We report the discovery of multiple previously undetected new filaments embedded in the outer disc in highly extincted regions. Stars in these overdensities have distance…