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View article: Q1 SLDE missed targets
Q1 SLDE missed targets Open
AstroVink-Q1: Strong gravitational lens candidates missed in Euclid Q1 This record contains newly identified strong gravitational lens candidates discovered with the AstroVink-Q1 vision-transformer network in Euclid Quick Data Release 1 (Q…
View article: Dependence of halo properties on central-satellite magnitude gaps through weak lensing measurements
Dependence of halo properties on central-satellite magnitude gaps through weak lensing measurements Open
The magnitude gap between the central and satellite galaxies encodes information about the mass accretion history of a dark matter halo, and serves as a useful observational probe for the mass distribution in a halo. In this work, we perfo…
View article: Efficacy of Galaxy Catalogues for following up gravitational wave events
Efficacy of Galaxy Catalogues for following up gravitational wave events Open
The detection of gravitational waves (GW) by the LIGO-Virgo-KAGRA (LVK) network has opened up a new era in astrophysics. The identification of the electromagnetic counterparts of GW sources is crucial for multi-messenger astronomy, one way…
View article: Discovery and dynamics of a Sedna-like object with a perihelion of 66 au
Discovery and dynamics of a Sedna-like object with a perihelion of 66 au Open
Trans-Neptunian objects (TNOs) with large perihelion distances ($q > 60$ au) and semi-major axes ($a > 200$ au) provide insights into the early evolution of the solar system and the existence of a hypothetical distant planet. These objects…
View article: Groundwater over‐extraction and associated land subsidence in Lucknow, Ganga Basin, India: Insights from space geodetic observations
Groundwater over‐extraction and associated land subsidence in Lucknow, Ganga Basin, India: Insights from space geodetic observations Open
The Gravity Recovery and Climate Experiment (GRACE & FO) satellite and in situ data from the Ganga River Basin (GRB) in India, one of the largest groundwater reservoirs, indicate a significant decline in water storage resulting from human …
View article: Modelling Galaxy Clustering and Tomographic Galaxy-Galaxy Lensing with HSC Y3 and SDSS using the Point-Mass Correction Model and Redshift Self-Calibration
Modelling Galaxy Clustering and Tomographic Galaxy-Galaxy Lensing with HSC Y3 and SDSS using the Point-Mass Correction Model and Redshift Self-Calibration Open
The combination of galaxy-galaxy weak lensing and galaxy clustering is a powerful probe of the cosmological model, and exploration of how to best model and extract this information from the signals is essential. We present the measurement …
View article: Cosmology and Source Redshift Constraints from Galaxy Clustering and Tomographic Weak Lensing with HSC Y3 and SDSS using the Point-Mass Correction Model
Cosmology and Source Redshift Constraints from Galaxy Clustering and Tomographic Weak Lensing with HSC Y3 and SDSS using the Point-Mass Correction Model Open
The combination of galaxy clustering and weak lensing is a powerful probe of the cosmology model. We present a joint analysis of galaxy clustering and weak lensing cosmology using SDSS data as the tracer of dark matter (lens sample) and th…
View article: Rapid identification of lensed type Ia supernovae with color-magnitude selection
Rapid identification of lensed type Ia supernovae with color-magnitude selection Open
Strongly lensed type Ia supernovae (SNe Ia) provide a unique cosmological probe to address the Hubble tension problem in cosmology. In addition to the sensitivity of the time delays to the value of the Hubble constant, the transient and st…
View article: Rapid identification of lensed type Ia supernovae with color-magnitude selection
Rapid identification of lensed type Ia supernovae with color-magnitude selection Open
Strongly lensed type Ia supernovae (SNe Ia) provide a unique cosmological probe to address the Hubble tension problem in cosmology. In addition to the sensitivity of the time delays to the value of the Hubble constant, the transient and st…
View article: Neural network prediction of model parameters for strong lensing samples from Hyper Suprime-Cam Survey
Neural network prediction of model parameters for strong lensing samples from Hyper Suprime-Cam Survey Open
Strong lensing of background galaxies provides important information about the matter distribution around lens galaxies. Traditional modelling of such strong lenses is both time and resource intensive. Fast and automated analysis methods a…
View article: Subaru Hyper-Supreme Cam observations of IC 1396
Subaru Hyper-Supreme Cam observations of IC 1396 Open
Context . Identifying members of star-forming regions is an initial step to analyse the properties of a molecular cloud complex. In such a membership analysis, the sensitivity of a dataset plays a significant role in detecting stellar mass…
View article: Subaru Hyper-Supreme Cam observations of IC 1396: Source catalogue, member population, and sub-clusters of the complex
Subaru Hyper-Supreme Cam observations of IC 1396: Source catalogue, member population, and sub-clusters of the complex Open
To identify member populations of IC 1396, we employ the random forest (RF) classifier of machine learning technique. Random forest classifier is an ensemble of individual decision trees suitable for large, high-dimensional datasets. The t…
View article: Astronomy and Society: The Road Ahead
Astronomy and Society: The Road Ahead Open
Astronomy, of all the sciences, is possibly the one with the most public appeal across all age groups. This is also evidenced by the existence of a large number of planetaria and amateur astronomy societies, which is unique to the field. A…
View article: Weak-Lensing Shear-Selected Galaxy Clusters from the Hyper Suprime-Cam Subaru Strategic Program: I. Cluster Catalog, Selection Function and Mass–Observable Relation
Weak-Lensing Shear-Selected Galaxy Clusters from the Hyper Suprime-Cam Subaru Strategic Program: I. Cluster Catalog, Selection Function and Mass–Observable Relation Open
We present the first step toward deriving cosmological constraints through the abundances of galaxy clusters selected in a weak-lensing aperture mass map, constructed with the Year-Three shear catalog from the Hyper Suprime-Cam Su…
View article: Dark Matter Halos of Luminous Active Galactic Nuclei from Galaxy–Galaxy Lensing with the HSC Subaru Strategic Program
Dark Matter Halos of Luminous Active Galactic Nuclei from Galaxy–Galaxy Lensing with the HSC Subaru Strategic Program Open
We assess the dark matter halo masses of luminous active galactic nuclei (AGNs) over the redshift range 0.2–1.2 using galaxy–galaxy lensing based on imaging data from the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP). We measure the…
View article: Strong-lensing cosmography using third-generation gravitational-wave detectors
Strong-lensing cosmography using third-generation gravitational-wave detectors Open
We present a detailed exposition of a statistical method for estimating cosmological parameters from the observation of a large number of strongly lensed binary-black-hole (BBH) mergers observable by next (third) generation (XG) gravitatio…
View article: Weak-Lensing Shear-Selected Galaxy Clusters from the Hyper Suprime-Cam Subaru Strategic Program: II. Cosmological Constraints from the Cluster Abundance
Weak-Lensing Shear-Selected Galaxy Clusters from the Hyper Suprime-Cam Subaru Strategic Program: II. Cosmological Constraints from the Cluster Abundance Open
We present cosmological constraints using the abundance of weak-lensing shear-selected galaxy clusters in the Hyper Suprime-Cam (HSC) Subaru Strategic Program. The clusters are selected on the aperture-mass maps constructed using the three…
View article: Environmental dependence on galaxy-halo connections for satellites using HSC weak lensing
Environmental dependence on galaxy-halo connections for satellites using HSC weak lensing Open
We present the luminosity-halo mass relations of satellite (sLHMRs) galaxies in the SDSS redMaPPer cluster catalogue and the effects of the dense cluster environment on subhalo mass evolution. We use data from the Subaru Hyper Suprime-Cam …
View article: Probing the nature of dark matter using strongly lensed gravitational waves from binary black holes
Probing the nature of dark matter using strongly lensed gravitational waves from binary black holes Open
Next-generation ground-based gravitational-wave (GW) detectors are expected to detect millions of binary black hole mergers during their operation period. A small fraction ($\sim 0.1 - 1\%$) of them will be strongly lensed by intervening g…
View article: Galaxy-dark matter connection from weak lensing in imaging surveys: Impact of photometric redshift errors
Galaxy-dark matter connection from weak lensing in imaging surveys: Impact of photometric redshift errors Open
The uncertainties in photometric redshifts and stellar masses from imaging surveys affect galaxy sample selection, their abundance measurements, as well as the measured weak lensing signals. We develop a framework to assess the systematic …
View article: Status of Astronomy Education in India: A Baseline Survey
Status of Astronomy Education in India: A Baseline Survey Open
We present the results of a nation-wide baseline survey, conducted by us, for the status of Astronomy education among secondary school students in India. The survey was administered in 10 different languages to over 2000 students from dive…
View article: Weak-Lensing Shear-Selected Galaxy Clusters from the Hyper Suprime-Cam Subaru Strategic Program: II. Cosmological Constraints from the Cluster Abundance
Weak-Lensing Shear-Selected Galaxy Clusters from the Hyper Suprime-Cam Subaru Strategic Program: II. Cosmological Constraints from the Cluster Abundance Open
We present cosmological constraints using the abundance of weak-lensing shear-selected galaxy clusters in the Hyper Suprime-Cam (HSC) Subaru Strategic Program. The clusters are selected on the mass maps constructed using the three-year (Y3…
View article: Correction to: Subaru HSC weak lensing of SDSS redMaPPer cluster satellite galaxies: empirical upper limit on orphan fractions
Correction to: Subaru HSC weak lensing of SDSS redMaPPer cluster satellite galaxies: empirical upper limit on orphan fractions Open
This is an erratum to the paper 'Subaru HSC weak lensing of SDSS redMaPPer cluster satellite galaxies: empirical upper limit on orphan fractions ', published as MNRAS 517, 4389-4404 (2022) with
View article: Neural network prediction of model parameters for strong lensing samples from Hyper Suprime-Cam Survey
Neural network prediction of model parameters for strong lensing samples from Hyper Suprime-Cam Survey Open
Strong lensing of background galaxies provides important information about the matter distribution around lens galaxies. Traditional modelling of such strong lenses is both time and resource intensive. Fast and automated analysis methods a…
View article: Exploring the baryonic effect signature in the Hyper Suprime-Cam Year 3 cosmic shear two-point correlations on small scales: the $S_8$ tension remains present
Exploring the baryonic effect signature in the Hyper Suprime-Cam Year 3 cosmic shear two-point correlations on small scales: the $S_8$ tension remains present Open
The baryonic feedback effect is considered as a possible solution to the so-called $S_8$ tension indicated in cosmic shear cosmology. The baryonic effect is more significant on smaller scales, and affects the cosmic shear two-point correla…
View article: Overabundance of orphan galaxies in the <scp>UniverseMachine</scp> empirical galaxy formation model
Overabundance of orphan galaxies in the <span>UniverseMachine</span> empirical galaxy formation model Open
Orphan galaxies that have lost a large fraction of the dark matter subhaloes have often been invoked in semi-analytical as well as empirical models of galaxy formation. However, observations have not yet constrained the distribution of orp…
View article: The intrinsic alignment of galaxy clusters and impact of projection effects
The intrinsic alignment of galaxy clusters and impact of projection effects Open
Galaxy clusters, being the most massive objects in the Universe, exhibit the strongest alignment with the large-scale structure. However, mis-identification of members due to projection effects from the large-scale structure can occur. We …
View article: Bayesian framework to infer the Hubble constant from the cross-correlation of individual gravitational wave events with galaxies
Bayesian framework to infer the Hubble constant from the cross-correlation of individual gravitational wave events with galaxies Open
Gravitational waves (GWs) from the inspiral of binary compact objects offer a one-step measurement of the luminosity distance to the event, which is essential for the measurement of the Hubble constant, $H_0$, which characterizes the expan…
View article: Hyper Suprime-Cam Year 3 results: Cosmology from galaxy clustering and weak lensing with HSC and SDSS using the minimal bias model
Hyper Suprime-Cam Year 3 results: Cosmology from galaxy clustering and weak lensing with HSC and SDSS using the minimal bias model Open
We present cosmological parameter constraints from a blind joint analysis of three two-point correlation functions measured from the Year 3 Hyper Suprime-Cam (HSC-Y3) imaging data, covering about 416 deg2, and the SDSS DR11 spectroscopic g…