523.1
The Cosmos
Cosmology, exoplanets, black holes and gravitational waves.
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exoplanet atmosphere observations
cosmology dark energy survey
523.1
Cosmology, exoplanets, black holes and gravitational waves.
Drawer contents
Filled from
Search threads
exoplanet atmosphere observations
cosmology dark energy survey
Sasha Hinkley, David K. Sing
The James Webb Space Telescope (JWST) is providing transformative characterization capabilities for the study of both transiting and directly imaged extrasolar planets. Observations deep into the infrared in the form of both spectroscopy and coronagraphic imaging means that JWST is uniquely sensitive to most of the…
Harper Rosenthal, Lisa Kaltenegger, Ryan J. MacDonald, Rebecca Payne + 1 more
The TRAPPIST-1 system offers seven terrestrial exoplanets with tight orbits and large radii ratios to the host star. If an atmosphere exists, transmission spectroscopy can be used to detect specific atmospheric features. Predictions of the atmospheric detectability of the TRAPPIST-1 planets prior to the launch of…
M. B. Michaelis, S. Wolf
For planets in the Solar System, circular polarization measurements complement linear polarimetry by providing additional information on cloud particle properties. As the disk-integrated circular polarization is 0 for symmetric planets, observing intrinsic circular polarization of spatially unresolved exoplanets…
Jian Ge, Zhangqi Dang, Ziru Zhang, Chenxu Gao + 14 more
Answering the question "Are we alone?" requires atmospheric spectroscopy of nearby terrestrial planets. For an Earth--Sun analog, even the strongest transmission signals are expected to be of order 1 part per million (ppm). Unlike short-period planets, Earth 2.0 planets transit only about once per year, so…
Cyril Gapp, Lorena Acuña-Aguirre, Reza Ashtari, Mario Damiano + 16 more
The atmospheres of sub-Neptunes provide a window into their internal structure and history, shedding light on the origin of this common, but enigmatic, class of exoplanets. However, the physical and chemical processes that shape sub-Neptunes' transmission spectra, in particular cloud and haze formation, are not well…
Jie Zheng, Da-Chun Qiang, Zhi-Qiang You, Darshan Kumar
The Dark Energy Spectroscopic Instrument (DESI) measurements of baryon acoustic oscillations (BAO) have recently shown a mild preference for dynamical dark energy over the standard $\rm Λ$CDM model. In this paper, we analyze the $w_0w_a$CDM model using DESI BAO DR2, Pantheon+ SNe Ia, and Planck 2018 CMB distance prior…
D. Koh Cuende, G. Panotopoulos
We investigate dynamical, time-evolving dark-energy models exhibiting phantom behaviour within Einstein gravity by analysing the evolution of matter perturbations. In particular, we consider five dark-energy parameterisations that predict a slowing down of the current cosmic acceleration. We examine the evolution of…
Ayumu Kuwahara, Michiel Lambrechts
We perform 3D multifluid simulations of gas and dust to quantify how convection reshapes the spatial distribution of dust grains inside the envelopes of disk-embedded planets. Building on the first paper of this series, which explored convectively stable envelopes, we here consider envelopes in which convection is…
T. Plunkett, E. Thygesen, A. A. Cole, J. Schulte + 15 more
We present three southern transiting giant planet candidates alerted by the Transiting Exoplanet Survey Satellite (TESS) mission and investigated at the University of Tasmania Greenhill Observatory (UTGO). The candidate planets are orbiting thin disk G-dwarf main-sequence stars with roughly solar metallicity…
Takashi Hamana
We perform a joint cosmological analysis using angular power spectra of galaxy clustering, galaxy-shear cross correlation, and cosmic shear (hereafter referred to as photo-3x2-pt) measured from the Hyper Suprime-Cam year-3 (HSC-Y3) weak lensing shape catalog. We employ the pseudo-$C_\ell$ method to measure these power…
M. L. Carroll, J. Li, S. D. Guzewich, G. Villanueva + 2 more
We investigate the transferability of Earth weather foundation models to planetary atmospheres by adapting the GraphCast graph neural weather forecasting model to Mars. While GraphCast achieves state-of-the-art performance for terrestrial forecasting, its applicability to non-Earth environments remains unexplored.…
M. Klein, S. Mangla, J. Mohr, S. Chatterjee + 6 more
Context: Wide-area radio continuum surveys require reliable optical and infrared counterpart identification, but high optical source densities and extended or multi-component radio morphologies make this challenging. Aims: We present optical and infrared counterpart catalogs for MeerKLASS L-band and UHF-band on-the-fly…
Seoyoung Lyla Jung, Madalina N. Tudorache, Matt J. Jarvis, Michalina Maksymowicz-Maciata + 7 more
Cosmic filaments have been recognised as influencing galaxy evolution, but their connection to galactic cold gas reservoirs is elusive, particularly at low redshifts. We investigate the influence of filaments on neutral hydrogen (HI) detections in galaxies at $0.02<z<0.09$, using the MeerKAT International GHz Tiered…
Richard Watkins, Hume A. Feldman
Megamaser distances can be measured without using the traditional distance ladder. As such, they provide an independent probe of the local expansion rate, quantified by the Hubble constant $H_0$. We re-analyze megamaser distance and redshift data to obtain a new, more accurate, estimate of $H_0$. The main improvement…
Bibhuprasad Mishra, Kanak Saha, Divya Pandey, Ananta C. pradhan
Lyman Break Galaxies (LBGs) are actively star-forming galaxies identified through their characteristic rest-frame ultraviolet spectral break, making them powerful probes of galaxy evolution across cosmic time. We present a search for LBGs at redshifts $1.6 \leq z \leq 3.0$ in the GOODS-North field using the dropout…
Niall MacCrann, Christopher Cain, Aleksandra Kusiak, Fiona McCarthy + 4 more
We investigate the cross-correlation of the kinematic Sunyaev-Zeldovich (kSZ) effect with lensing of the cosmic microwave background (CMB) as a probe of the epoch of reionisation. During reionisation, bubbles of ionised electrons form around overdensities, generating temperature perturbations in the CMB via the kSZ…
C. R. Angus, M. Quilt, H. F. Stevance, M. Nicholl + 36 more
The Vera C. Rubin Observatory's Legacy Survey of Space and Time will discover unprecedented numbers of rare, long-lived optical transients, many of which will be too faint or too numerous for comprehensive spectroscopic follow-up. Characterising objects that span the boundaries between established transient classes is…