Kavli Affiliate: Mark Vogelsberger | First 5 Authors: Aidan Leonard, Stephanie O’Neil, Xuejian Shen, Mark Vogelsberger, Olivia Rosenstein | Summary: Self-interacting dark matter (SIDM) is increasingly studied as a potential solution to small-scale discrepancies between simulations of cold dark matter (CDM) and observations. We examine a physically motivated two-state SIDM model with both elastic and […]

Kavli Affiliate: Herman L. Marshall | First 5 Authors: Anna Bobrikova, Sofia V. Forsblom, Alessandro Di Marco, Fabio La Monaca, Juri Poutanen | Summary: Weakly magnetized neutron stars in X-ray binaries show complex phenomenology with several spectral components that can be associated with the accretion disk, boundary and/or spreading layer, a corona, and a wind. […]

Kavli Affiliate: Dheeraj R. Pasham | First 5 Authors: Yukta Ajay, Dheeraj R. Pasham, Thomas Wevers, Eric R. Coughlin, Francesco Tombesi | Summary: ASASSN-14li is a low-redshift ($z= 0.0206$) tidal disruption event (TDE) that has been studied extensively across the entire electromagnetic spectrum, and has provided one of the most sensitive measurements of a TDE […]

Kavli Affiliate: Anna Frebel | First 5 Authors: Shivani P. Shah, Rana Ezzeddine, Ian U. Roederer, Terese T. Hansen, Vinicius M. Placco | Summary: We present a detailed chemical-abundance analysis of a highly $r$-process enhanced (RPE) star, 2MASS J00512646-1053170, using high-resolution spectroscopic observations with $Hubble Space Telescope$/STIS in the UV and Magellan/MIKE in the optical. […]

Kavli Affiliate: Andrew Vanderburg | First 5 Authors: Zoë L. de Beurs, Andrew Vanderburg, Erica Thygesen, Joseph E. Rodriguez, Xavier Dumusque | Summary: We report precise radial velocity (RV) observations of HD 212657 (= K2-167), a star shown by K2 to host a transiting sub-Neptune-sized planet in a 10 day orbit. Using Transiting Exoplanet Survey […]

Kavli Affiliate: Anna Frebel | First 5 Authors: Anirudh Chiti, Mohammad Mardini, Guilherme Limberg, Anna Frebel, Alexander P. Ji | Summary: The Large Magellanic Cloud (LMC) is the Milky Way’s most massive satellite galaxy, which only recently (~2 billion years ago) fell into our Galaxy. Since stellar atmospheres preserve their natal cloud’s composition, the LMC’s […]

Kavli Affiliate: Anna Frebel | First 5 Authors: Anirudh Chiti, Mohammad Mardini, Guilherme Limberg, Anna Frebel, Alexander P. Ji | Summary: The Large Magellanic Cloud (LMC) is the Milky Way’s most massive satellite galaxy, which only recently (~2 billion years ago) fell into our Galaxy. Since stellar atmospheres preserve their natal cloud’s composition, the LMC’s […]

Kavli Affiliate: Anna Frebel | First 5 Authors: Anirudh Chiti, Mohammad Mardini, Guilherme Limberg, Anna Frebel, Alexander P. Ji | Summary: The Large Magellanic Cloud (LMC) is the Milky Way’s most massive satellite galaxy, which only recently (~2 billion years ago) fell into our Galaxy. Since stellar atmospheres preserve their natal cloud’s composition, the LMC’s […]

Kavli Affiliate: Robert A. Simcoe | First 5 Authors: Dominika Ďurovčíková, Anna-Christina Eilers, Huanqing Chen, Sindhu Satyavolu, Girish Kulkarni | Summary: The spectra of high-redshift ($zgtrsim 6$) quasars contain valuable information on the progression of the Epoch of Reionization (EoR). At redshifts $z<6$, the observed Lyman-series forest shows that the intergalactic medium (IGM) is nearly […]

Kavli Affiliate: Erin Kara | First 5 Authors: Jingyi Wang, Erin Kara, Jeroen Homan, James F. Steiner, Diego Altamirano | Summary: IGR J17091-3624 is a black hole X-ray binary (BHXB), often referred to as the ‘twin’ of GRS 1915+105 because it is the only other known BHXB that can show exotic ‘heartbeat’-like variability that is […]