The ELM Survey. II. Twelve Binary White Dwarf Merger Systems
We describe new radial velocity and X-ray observations of extremely low-mass white dwarfs (ELM WDs, ~0.2 M sun) in the Sloan Digital Sky Survey Data Release 4...
The ELM Survey. III. A Successful Targeted Survey for Extremely Low Mass White Dwarfs
Extremely low mass (ELM) white dwarfs (WDs) with masses 0.25 M &sun; are rare objects that result from compact binary evolution. Here, we present a targeted...
We present new radial velocity and X-ray observations of extremely low mass (ELM, ~0.2 M &sun;) white dwarf (WD) candidates in the Sloan Digital Sky Survey Data...
The ELM Survey. VII. Orbital Properties of Low-Mass White Dwarf Binaries
We present the discovery of 15 extremely low-mass (5\lt {log}g\lt 7) white dwarf (WD) candidates, 9 of which are in ultra-compact double-degenerate binaries...
The elusive atmosphere of WASP-12 b. High-resolution transmission spectroscopy with CARMENES
To date, the hot Jupiter WASP-12 b has been the only planet with confirmed orbital decay. The late F-type host star has been hypothesized to be surrounded by a...
The emergence of a neutral Herbig-Haro jet into a photoionized nebula
Recent observations show the existence of an increasing number of collimated outflows ejected by young, low-mass stars which are embedded in Hii regions. At...
The emergence of toroidal flux tubes from beneath the solar photosphere
Context: Models of flux emergence frequently use a twisted cylindrical loop as the initial starting configuration and ignore the coupling between the radiation...