Y dwarfs
Sub-stellar objects with habitable-zone temperatures: A new search for Y dwarfs in WISE
... Abstract. A method is defined for using the maximum sensitivity of WISE to find late T and Y dwarfs. This requires a WISE detection only in the W2-band and uses the statistical properties of the WISE ...
6
Atmospheres of brown dwarfs
... Brown dwarfs become increasingly dimmer as they age because their mass is too small to sustain continuous hydrogen ...brown dwarfs fuse some helium and maybe ...brown dwarfs comprises members that ...
53
Ionization in atmospheres of brown dwarfs and giant gas planets
... ’Brown dwarfs’ was introduced by Tarter ...’black dwarfs’ (the last stage of white dwarf cooling) and ’red dwarfs’ (bright in ...Brown dwarfs likely were formed like stars, however, very low ...
113
The spatial experiences of dwarfs in public spaces
... for dwarfs but this is dependent on how they have been constructed and for ...that dwarfs could be accommodated for through providing multiple or adjustable facilities, but may be overlooked by planners or ...
13
Two white dwarfs with oxygen rich atmospheres
... tures to proceed to carbon burning, and produce either oxygen-neon (ONe) core white dwarfs, or undergo a core-collapse supernova (SN II) via electron capture on the products of carbon burning (1). The exact ...
18
Observations of remnant planetary systems at white dwarfs
... white dwarfs, a hypothesis strengthened by the second detection of an infrared excess consistent with a dusty disc (Kilic et ...white dwarfs with dusty discs are known at the time of writing (Farihi, ...
146
Infrared variability of two dusty white dwarfs
... 11,015 K ) , we are able to obtain a very good match in the 10 μ m feature for the 2004 epoch, and a reasonable fi t in the midinfrared SED; however, the fi t in the 20 μ m region is less good, as shown in the left ...
13
Periodic variability of spotted M dwarfs in WTS
... From a sub-sample of variable objects are selected using a Lomb-Scargle periodogram, 71 variable rotating MV stars are found with a range of periods from 0.16 to 90.3 days and amplitudes from 0.009 to 0.115 in the J ...
5
Pulsations in white dwarfs: Selected topics
... Abstract. This paper presents a very brief overview of the observed properties of g-mode pulsations in variable white dwarfs. We then discuss a few selected topics: Excitation mechanisms (kappa- and convection- ...
10
The GALAH survey: lithium-strong KM dwarfs
... At a given abundance, the line strength increases with increasing colour (tracing a decreasing effective temperature) as shown in Fig. 6. This is mainly due to the population of the ground state increasing caused by a ...
10
New planets around three G Dwarfs
... The physical parameters for the planet-bearing stars reported in this paper are listed in Table 1. All three of these stars are clas- sified as G dwarfs in the Michigan Catalog (Houk & Cowley 1975, 1978, ...
6
CARMENES: Blue planets orbiting red dwarfs
... occurrence and architecture for these stars is of great importance to understand the physics of planet formation and evolution in general, and its dependence on stellar host mass. Radial-velocity searches for planets ...
9
The Gaia DR1 mass–radius relation for white dwarfs
... white dwarfs had no parallax measurements until now and were not known to be double ...white dwarfs can almost perfectly mimic a single DA in spectroscopic and photometric ...
14
The gaseous component to planetary debris discs at white dwarfs
... white dwarfs accrete from low- mass main-sequence stars (Manser and Gänsicke, ...white dwarfs accreting from hydrogen-depleted degenerate companions, some of them with extreme mass ratios (Kupfer et ...
189
Brown dwarfs forming in discs: Where to look for them?
... brown dwarfs may form by gravitational fragmentation of unstable ...brown dwarfs loosely bound on wide orbits (100–5000 AU) around Sun-like stars that surveys of brown dwarf companions should ...
6
Observations of ultracool dwarfs with ULTRACAM on the VLT: a search for weather
... A better approach may be to use time-resolved photometry, taken simultaneously in a narrow band centred on dust-centred features and a continuum filter. Photometry does not suffer from slit-loss errors, as other stars in ...
6
Ultracool dwarfs in open clusters and star-forming regions
... For all the aforementioned clusters, we derived the luminosity and mass functions using the NextGen and DUSTY models from the Lyon group for consistency [31, 32]. The range of masses studied by the GCS vary from one ...
7
The Dynamics of White Dwarfs, Black Holes and Stellar Cusps
... white dwarfs using proper ...white dwarfs with high mass have a reduced scale height, and hence their local density is enhanced over their less-massive ...white dwarfs (> ...
193
A universal spin mass relation for brown dwarfs and planets
... brown dwarfs show similarities to stars early in their lives, their spin evolutions are much more akin to those of ...brown dwarfs in the Taurus star-forming ...brown dwarfs with disks is twice as ...
10
The distribution of ejected brown dwarfs in clusters
... brown dwarfs and stars are different or if the veloc- ity dispersion between cores effectively conceals the ejection of brown dwarfs and low-mass ...
5