44 citations · 163 across the 16 of their papers we have counts for
11 papers · 1 filter
ABYSS. IV. Identifying signatures of stellar youth in APOGEE spectra
Valentina Bonilla Villalobos, Marina Kounkel, Joseph Mullen +9
We develop a convolutional neural network classifier that performs spectroscopic identification of stellar youth (<40 Myr) in APOGEE spectra. This classifier is sensitive to severa…
The Age of the R127 & R128 Clusters: Implications for the LBV
Mojgan Aghakhanloo, Jeremiah W. Murphy, Nathan Smith +1
We infer the age of the R127 and R128 clusters in the Large Magellanic Cloud (LMC) using Strömgren photometry from the literature and the age-dating algorithm, Stellar Ages. Analys…
Quantifying Systematic Age Discrepancies in Very Young Star Clusters
Joseph Guzman, Jeremiah Murphy, Emma Beasor +5
We infer the ages of three young stellar clusters, NGC 2004, NGC 7419, and NGC 2100, using Stellar Ages, a statistical algorithm designed to infer stellar population properties fro…
Spectroscopy of AT 2016blu's recurring supernova impostor outbursts
Mojgan Aghakhanloo, Nathan Smith, Jennifer E. Andrews +7
We present spectra of the supernova (SN) impostor AT 2016blu spanning over a decade. This transient exhibits quasiperiodic outbursts with a 113 d period, likely triggered by…
Recurring outbursts of the supernova impostor AT 2016blu in NGC 4559
Mojgan Aghakhanloo, Nathan Smith, Peter Milne +8
We present the first photometric analysis of the supernova (SN) impostor AT 2016blu in NGC 4559. This transient was discovered by the Lick Observatory Supernova Search in 2012 and…
Repeating periodic eruptions of the supernova impostor SN 2000ch
Mojgan Aghakhanloo, Nathan Smith, Peter Milne +7
We analyse photometric observations of the supernova (SN) impostor SN 2000ch in NGC 3432 covering the time since its discovery. This source was previously observed to have four out…
Hubble Space Telescope Imaging Reveals That SN 2015bh Is Much Fainter than Its Progenitor
Jacob E. Jencson, David J. Sand, Jennifer E. Andrews +5
We present Hubble Space Telescope (HST) imaging of the site of SN 2015bh in the nearby spiral galaxy NGC 2770 taken between 2017 and 2019, nearly four years after the peak of the e…
Kinematics of Luminous Blue Variables in the Large Magellanic Cloud
Mojgan Aghakhanloo, Nathan Smith, Jennifer Andrews +3
We study the kinematics of luminous blue variables (LBVs) in the Large Magellanic Cloud (LMC). Using high-resolution spectra, we measure the systemic radial velocities for a sample…
Inferring the parallax of Westerlund 1 from Gaia DR2
Mojgan Aghakhanloo, Jeremiah W. Murphy, Nathan Smith +6
Westerlund 1 (Wd1) is potentially the largest star cluster in the Galaxy. That designation critically depends upon the distance to the cluster, yet the cluster is highly obscured,…
On the Gaia DR2 distances for Galactic Luminous Blue Variables
Nathan Smith, Mojgan Aghakhanloo, Jeremiah W. Murphy +3
We examine parallaxes and distances for Galactic luminous blue variables (LBVs) in Gaia DR2. The sample includes 11 LBVs and 14 LBV candidates. For about half of the sample, DR2 di…
Modelling Luminous-Blue-Variable Isolation
Mojgan Aghakhanloo, Jeremiah W. Murphy, Nathan Smith +1
Observations show that luminous blue variables (LBVs) are far more dispersed than massive O-type stars, and Smith & Tombleson suggested that these large separations are inconsisten…