The poorly-studied, faint (18<m_pg<19.5) variable star CC Bootis has been noted in the literature as a candidate for a halo red giant. It proves instead to be a quasi-stellar object of redshift z=0.172, and is detected as an X-ray source by ROSAT....
Detailed analysis of the spectral lines from two low redshift damped Lyman alpha absorbers (DLA) confirms that they are a heterogeneous population. Both systems have low metal abundances of approximately 0.05 to 0.1 solar. The abundance pattern of...
I've made friends at bars that have been involved in harder stuff like coke. This crowd was into the same music/scene I wanted to be a part of. And I've participated but it seemed like they were alway...
My whole life I feel like I’ve been getting vague messaging that they suck or are overrated or something. I’m sitting here listening with relatively fresh ears and I’m pretty mind blown. And the...
We are undertaking a program to measure emission line ratios in a selected sample of $0.5 < z < 1.0$ CFRS starforming galaxies in order to compute their Interstellar Medium metallicities. The latter are derived by means of the empirically-calibrate...
I truly do not understand it. I don’t get how people can identify *outside* of the binary of male and female. I understand Trans. That makes sense to me. If you transition, you’re still adhering...
When we met in college she was cool and smart and I respected her even looked up to her but I think too many years being single and living in California exposed to the potent west coast brand of libta...
Should have added an image of the three men frolicking scene...
I guess you could say I too was a victim of Epstein I miss pre-/pol/ tourist invasion 4chan...
Mod for Minetest that adds digital circuitry [=Minecraft redstone] (⭐ 216)
Recent redshift surveys have shown that the excess galaxies seen in faint galaxy number counts (above those expected given the local galaxy luminosity function) are not evolved giants at high redshifts, but low to moderate luminosity objects at mor...
The cosmic "Dark Ages" is the period between the last scattering of the Cosmic Microwave Background (CMB) and the appearance of the first luminous sources, spanning redshifts $1100\gtrsim z\gtrsim 30$. The only way to observe this period is by examin...
Recent observations of Stephan's Quintet gave new indications on its formation scenario. Older formation and a role of NCG 7317 should be considered in revised numerical models of the compact group. Velocities of group members to recreate are estimat...
We present CARMA observations of a massive galaxy cluster discovered in the AMI blind SZ survey. Without knowledge of the cluster redshift a Bayesian analysis of the AMI, CARMA and joint AMI & CARMA uv-data is used to quantify the detection significa...
We present the COMBO-17 object catalogue of the Chandra Deep Field South for public use, covering a field which is 31.5' x 30' in size. This catalogue lists astrometry, photometry in 17 passbands from 350 to 930 nm, and ground-based morphological d...
We present a formalism describing the physical content of cross-correlation functions between a diffuse background and a population of discrete sources. The formalism is used to interpret cross-correlation signals between the unresolved X-ray backg...
...
Quasars at the redshift frontier (z > 7.0) are fundamental probes of black hole (BH) growth and evolution but notoriously difficult to identify. At these redshifts, machine learning-based selection methods have proven to be efficient, but require app...
The emission line survey within the Calar Alto Deep Imaging Survey (CADIS) detects galaxies with very low continuum brightness by using an imaging Fabry-Perot interferometer. With spectroscopic follow-up observations of MB>~-19 CADIS galaxies using...
...