Search Publications
Preparing for LSST data. Estimating the physical properties of z < 2.5 main-sequence galaxies
Shirley, R.; Buat, V.; Boquien, M. +8 more
Aims: We study how the upcoming Legacy Survey of Space and Time (LSST) data from the Vera C. Rubin Observatory can be employed to constrain the physical properties of normal star-forming galaxies (main-sequence galaxies). Because the majority of the observed LSST objects will have no auxiliary data, we use simulated LSST data and existing rea…
Interstellar Extinction, Polarization, and Grain Alignment in the Sh 2-185 (IC 59 and IC 63) Region
Soam, Archana; Andersson, B. -G.; Acosta-Pulido, J. A. +6 more
Optical and infrared continuum polarization from the interstellar medium is driven by radiative processes aligning the grains with the magnetic field. While a quantitative, predictive theory of radiative alignment torques (RATs) exists and has been extensively tested, several parameters of the theory remain to be fully constrained. In a recent pap…
Electron temperature fluctuations in Seyfert galaxies
Riffel, Rogemar A.; Esteban, César; Dors, Oli L. +1 more
We use Gemini GMOS-IFU observations of three luminous nearby Seyfert galaxies (Mrk 79, Mrk 348, and Mrk 607) to estimate the electron temperature (Te) fluctuations in the inner 0.4-1.1 kpc region of these galaxies. Based on Te determinations through the [O III]λ5007/λ4363 emission line ratio of each spaxel, temperature variat…
Highly Structured Inner Planetary System Debris around the Intermediate Age Sun-like Star TYC 8830 410 1
Weinberger, Alycia J.; Song, Inseok; Olofsson, Johan +4 more
We present a detailed characterization of the extremely dusty main-sequence star TYC 8830 410 1. This system hosts inner planetary system dust (T dust ≈ 300 K) with a fractional infrared luminosity of ~1%. Mid-infrared spectroscopy reveals a strong, mildly crystalline solid-state emission feature. TYC 8830 410 1 (spectral type G9 V) has…
Past, present and future stars that can see Earth as a transiting exoplanet
Kaltenegger, L.; Faherty, J. K.
In the search for life in the cosmos, transiting exoplanets are currently our best targets. With thousands already detected, our search is entering a new era of discovery with upcoming large telescopes that will look for signs of `life' in the atmospheres of transiting worlds. Previous work has explored the zone from which Earth would be visible w…
Search for dormant black holes in ellipsoidal variables - III. The OGLE BULGE short-period sample
Gomel, Roy; Faigler, Simchon; Mazeh, Tsevi +1 more
This is the third of a series of papers that presents an algorithm to search for close binaries with massive, possibly compact, unseen secondaries. The detection of such a binary is based on identifying a star that displays a large ellipsoidal periodic modulation, induced by tidal interaction with its companion. In the second paper of the series, …
Vibrationally excited HC3N emission in NGC 1068: tracing the recent star formation in the starburst ring
Martín-Pintado, J.; García-Burillo, S.; González-Alfonso, E. +5 more
Using the ALMA data, we have studied the HC3N and continuum emission in the starburst pseudo-ring (SB pseudo-ring) and the circumnuclear disc (CND) of the SB/active galactic nucleus (AGN) composite galaxy NGC 1068. We have detected emission from vibrationally excited HC3N (HC3N*) only towards one star-forming regio…
APOGEE-2 Discovery of a Large Population of Relatively High-metallicity Globular Cluster Debris
Bizyaev, Dmitry; Pan, Kaike; Majewski, Steven R. +13 more
We report the discovery of a new, chemically distinct population of relatively high-metallicity ([Fe/H] > -0.7) red giant stars with super-solar [N/Fe] (≳+0.75) identified within the bulge, disk, and halo of the Milky Way. This sample of stars was observed during the second phase of the Apache Point Observatory Galactic Evolution Experiment (AP…
Large closed-field corona of WX Ursae Majoris evidenced from radio observations
Ray, T. P.; Vidotto, A. A.; Callingham, J. R. +5 more
The space-weather conditions that result from stellar winds significantly impact the habitability of exoplanets. The conditions can be calculated from first principles if the necessary boundary conditions are specified, namely the plasma density in the outer corona and the radial distance at which the plasma forces the closed magnetic field into a…
Canis Major OB1 stellar group contents revealed by Gaia
Mendes de Oliveira, C.; Borges Fernandes, M.; Bonatto, C. +15 more
Canis Major OB1 (CMa OB1) is a Galactic stellar association with a very intriguing star-formation scenario. There are more than two dozen known star clusters in its line of sight, but it is not clear which ones are physically associated with CMa OB1. We use a clustering code that employs five-dimensional data from the Gaia DR2 catalogue to identif…