Trystan S. Lambert
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View article: Nessie: A Rust-Powered, Fast, Flexible, and Generalized Friends-of-Friends Galaxy-Group Finder in R and Python
Nessie: A Rust-Powered, Fast, Flexible, and Generalized Friends-of-Friends Galaxy-Group Finder in R and Python Open
We introduce Nessie, a galaxy group finder implemented in Rust and distributed as both a Python and R package. Nessie employs the friends-of-friends (FoF) algorithm and requires only on-sky position and redshift as input, making it immedia…
View article: Deep Extragalactic VIsible Legacy Survey (DEVILS): Galaxy group catalogue for the D10-COSMOS field with 90% spectroscopic redshift completeness
Deep Extragalactic VIsible Legacy Survey (DEVILS): Galaxy group catalogue for the D10-COSMOS field with 90% spectroscopic redshift completeness Open
Large-scale galaxy redshift surveys conducted over the last couple of decades have proven crucial in deepening our understanding of structure growth in the Universe and galaxy evolution. While there have been several such surveys, until no…
View article: Group Therapy for Halos: Advancing Halo Mass Estimation for Galaxy Groups
Group Therapy for Halos: Advancing Halo Mass Estimation for Galaxy Groups Open
Accurate estimation of dark matter halo masses for galaxy groups is central to studies of galaxy evolution and for leveraging group catalogues as cosmological probes. We present a calibration and evaluation of two complementary halo mass e…
View article: The ALMA-CRISTAL survey: Extended [CII] emission in an interacting galaxy system at z ∼ 5.5
The ALMA-CRISTAL survey: Extended [CII] emission in an interacting galaxy system at z ∼ 5.5 Open
The ALMA [C II] Resolved Ism in STar-forming gALaxies (CRISTAL) survey is a Cycle 8 ALMA Large Program that studies the cold- gas component of high-redshift galaxies. Its subarcsecond-resolution observations are key to distinguishing physi…
View article: The ALMA-CRISTAL survey: Extended [CII] emission in an interacting galaxy system at z ∼ 5.5
The ALMA-CRISTAL survey: Extended [CII] emission in an interacting galaxy system at z ∼ 5.5 Open
The ALMA [C II] Resolved Ism in STar-forming gALaxies (CRISTAL) survey is a Cycle 8 ALMA Large Program that studies the cold- gas component of high-redshift galaxies. Its subarcsecond-resolution observations are key to distinguishing physi…
View article: Searching for Low-redshift Hot Dust-obscured Galaxies
Searching for Low-redshift Hot Dust-obscured Galaxies Open
Hot dust-obscured galaxies (Hot DOGs), discovered by the “W1W2 dropout” selection at high redshifts ( z ∼ 2–4), are a rare population of hyperluminous obscured quasars. Their number density is comparable to similarly luminous type 1 quasar…
View article: Searching for Low-Redshift Hot Dust-Obscured Galaxies
Searching for Low-Redshift Hot Dust-Obscured Galaxies Open
Hot Dust-Obscured Galaxies (Hot DOGs), discovered by the "W1W2 dropout" selection at high redshifts ($z\sim$ 2-4), are a rare population of hyper-luminous obscured quasars. Their number density is comparable to similarly luminous type 1 qu…
View article: Overdensity of Lyman-break galaxy candidates around hot-dust-obscured galaxies
Overdensity of Lyman-break galaxy candidates around hot-dust-obscured galaxies Open
Hot dust-obscured galaxies (hot DOGs) are a family of hyper-luminous, heavily obscured quasars. A number of studies based on the identification of companions at optical to far-infrared (FIR) wavelengths have shown that these objects reside…
View article: Overdensity of Lyman-Break Galaxy Candidates Around Hot Dust-Obscured Galaxies
Overdensity of Lyman-Break Galaxy Candidates Around Hot Dust-Obscured Galaxies Open
Hot dust-obscured galaxies (Hot DOGs), are a family of hyper-luminous, heavily obscured quasars. A number of studies have shown that these objects reside in significantly overdense regions of the Universe based on the identification of com…
View article: A lack of Lyman <i>α</i> emitters within 5 Mpc of a luminous quasar in an overdensity at <i>z</i> = 6.9: Potential evidence of negative quasar feedback at protocluster scales
A lack of Lyman <i>α</i> emitters within 5 Mpc of a luminous quasar in an overdensity at <i>z</i> = 6.9: Potential evidence of negative quasar feedback at protocluster scales Open
High-redshift quasars are thought to live in the densest regions of space, which should be made evident by an overdensity of galaxies around them. However, campaigns to identify these overdensities by searching for Lyman-break galaxies (LB…
View article: A comprehensive investigation of environmental influences on galaxies in group environments
A comprehensive investigation of environmental influences on galaxies in group environments Open
Environment has long been known to have an impact on the evolution of galaxies, but disentangling its impact from mass evolution requires the careful analysis of statistically significant samples. By implementing cutting-edge visualisation…
View article: A Nearby Isolated Dwarf: Star Formation and Structure of ESO 006–001
A Nearby Isolated Dwarf: Star Formation and Structure of ESO 006–001 Open
Observations with the Hubble Space Telescope unexpectedly revealed that the dwarf galaxy ESO 006–001 is a near neighbor to the Local Group at a distance of 2.70 ± 0.11 Mpc. The stellar population in the galaxy is well resolved into individ…
View article: A nearby isolated dwarf: star formation and structure of ESO 006-001
A nearby isolated dwarf: star formation and structure of ESO 006-001 Open
Observations with the Hubble Space Telescope unexpectedly revealed that the dwarf galaxy ESO 006-001 is a near neighbor to the Local Group at a distance of 2.70 +- 0.11 Mpc. The stellar population in the galaxy is well resolved into indivi…
View article: Structure and kinematics of a massive galaxy at <i>z</i> ∼ 7
Structure and kinematics of a massive galaxy at <i>z</i> ∼ 7 Open
Context. Observations of the rest-frame UV emission of high-redshift galaxies suggest that the early stages of galaxy formation involve disturbed structures. Imaging the cold interstellar medium (ISM) can provide a unique view of the kinem…
View article: <i>TESS</i> cycle 1 observations of roAp stars with 2-min cadence data
<i>TESS</i> cycle 1 observations of roAp stars with 2-min cadence data Open
We present the results of a systematic search for new rapidly oscillating Ap (roAp) stars using the 2-min cadence data collected by the Transiting Exoplanet Survey Satellite (TESS) during its Cycle 1 observations. We identify 12 new roAp s…
View article: The 2MASS redshift survey galaxy group catalogue derived from a graph-theory based friends-of-friends algorithm
The 2MASS redshift survey galaxy group catalogue derived from a graph-theory based friends-of-friends algorithm Open
We present the galaxy group catalogue for the recently completed 2MASS Redshift Survey (2MRS; Macri et al. 2019) which consists of 44 572 redshifts, including 1041 new measurements for galaxies mostly located within the Zone of Avoidance. …
View article: Galaxy groups in the updated 2MRS using a graph-theory based friends-of-friends algorithm
Galaxy groups in the updated 2MRS using a graph-theory based friends-of-friends algorithm Open
A galaxy group catalogue for the recently-completed 2MASS Redshift Survey (2MRS, Macri et al., 2019) is presented which consists of 44572 redshifts, including 1041 new measurements for galaxies mostly located within the Zone of Avoidance. …
View article: Suppressed phase variations in a high amplitude rapidly oscillating Ap star pulsating in a distorted quadrupole mode
Suppressed phase variations in a high amplitude rapidly oscillating Ap star pulsating in a distorted quadrupole mode Open
We present the results of a multisite photometric observing campaign on the rapidly oscillating Ap (roAp) star 2MASS 16400299-0737293 (J1640; V = 12.7). We analyse photometric B data to show the star pulsates at a frequency of 151.93 d−1 (…