AAS NOVA — Research Highlights 2017

Find out the latest thinking about our universe.
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Have Two Lonely Trans-Neptunian Objects Found Each Other?

Postby bystander » Tue Aug 15, 2017 2:24 pm

Have Two Lonely Trans-Neptunian Objects Found Each Other?
NOVA | American Astronomical Society | 2017 Aug 11

Who says there’s no romance in the outer solar system? A new study has identified 2004 TT357 as a body that may be made up of two separate objects in contact with each other.

2004 TT357: A Potential Contact Binary in the Trans-Neptunian Belt - Audrey Thirouin, Scott S. Sheppard, Keith S. Noll
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Can Radio Telescopes Find Axions?

Postby bystander » Tue Aug 22, 2017 4:19 pm

Can Radio Telescopes Find Axions?
NOVA | American Astronomical Society | 2017 Aug 16

In the search for dark matter, the most commonly accepted candidates are invisible, massive particles commonly referred to as WIMPs. But as time passes and we still haven’t detected WIMPs, alternative scenarios are becoming more and more appealing. Prime among these is the idea of axions. ...

A Radio Astronomy Search for Cold Dark Matter Axions - Katharine Kelley, P.J. Quinn
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Re: AAS NOVA — Research Highlights 2017

Postby MargaritaMc » Mon Aug 28, 2017 7:22 pm

16th Meeting of AAS High Energy Astrophysics Division (HEAD).

AAS Nova Editor’s note: This week [ the week beginning 21 August 2017] we’re in Sun Valley, Idaho at the 16th meeting of the AAS High Energy Astrophysics Division (HEAD). Follow along to catch some of the latest news from the field of high energy astro!

http://aasnova.org/2017/08/21/2017-head-welcome/
Greetings from the 16th meeting of the High Energy Astrophysics Division (HEAD) of the American Astronomical Society in Sun Valley, Idaho! This week, I will be writing updates on just a few of the events at the meeting and posting each morning. The usual posting schedule for AAS Nova will resume next week.

http://aasnova.org/2017/08/22/2017-head-day-1/

http://aasnova.org/2017/08/23/2017-head-day-2/

http://aasnova.org/2017/08/24/2017-head-day-3/


"In those rare moments of total quiet with a dark sky, I again feel the awe that struck me as a child. The feeling is utterly overwhelming as my mind races out across the stars. I feel peaceful and serene."
— Dr Debra M. Elmegreen, Fellow of the AAAS

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Discovery of a Metal-Poor Little Cub

Postby bystander » Fri Sep 01, 2017 2:14 pm

Discovery of a Metal-Poor Little Cub
NOVA | American Astronomical Society | 2017 Aug 30
The discovery of an extremely metal-poor star-forming galaxy in our local universe, dubbed Little Cub, is providing astronomers with front-row seats to the quenching of a near-pristine galaxy. ...

The Little Cub: Discovery of an Extremely Metal-poor Star-forming Galaxy in the Local Universe - Tiffany Hsyu et al

viewtopic.php?t=37359#p272646
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How a Black Widow Consumes Its Companion

Postby bystander » Mon Sep 04, 2017 8:34 pm

How a Black Widow Consumes Its Companion
NOVA | American Astronomical Society | 2017 Sep 01
Hanging out in a binary system with a hot millisecond pulsar can be hazardous to your health! A new study has examined how these perilous objects can heat and evaporate away their companions. ...

B-ducted Heating of Black Widow Companions - Nicholas Sanchez, Roger W. Romani
Know the quiet place within your heart and touch the rainbow of possibility; be
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ALMA Finds Hints of Early Black-Hole Growth

Postby bystander » Sun Sep 10, 2017 4:04 pm

ALMA Finds Hints of Early Black-Hole Growth
NOVA | American Astronomical Society | 2017 Sep 06

How did the first supermassive black holes grow alongside their host galaxies in the early universe? New observations from the Atacama Millimeter/Submillimeter Array (ALMA) have provided us with a detailed look at one quasar, which may help us to answer this question. ...

Gas Dynamics of a Luminous z = 6.13 Quasar ULAS J1319+0950
Revealed by ALMA High-Resolution Observations
- Yali Shao et al
Know the quiet place within your heart and touch the rainbow of possibility; be
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The Total Solar Eclipse of 1854

Postby bystander » Fri Sep 15, 2017 6:07 pm

The Total Solar Eclipse of 1854
NOVA | American Astronomical Society | 2017 Sep 08

Can’t get enough eclipse news? Check out this coverage of the solar eclipse of 1854! Special thanks to Tumblr blogger Nemfrog for digging this out of the archives.

These two sets of photographs both capture the annular solar eclipse that occurred on May 26, 1854, passing close to the U.S./Canada border. The photographs come from articles (linked below) published by two scientists who both watched the eclipse from the state of New York and made extensive measurements of its properties. ...

Observation of the annular eclipse of May 26, in the suburbs of Ogdensburgh, N. Y. - Stephen Alexander
On the solar eclipse of 1854 May 26 - W. H. C. Bartlett
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TRAPPIST-1’s Stability and Age

Postby bystander » Fri Sep 15, 2017 6:19 pm

TRAPPIST-1’s Stability and Age
NOVA | American Astronomical Society | 2017 Sep 11

If you missed the New York Times publication of this video back in May, it’s definitely worth a watch! The video, created by Matt Russo (CITA, University of Toronto), Dan Tamayo, (University of Toronto Scarborough), and Andrew Santaguida (RVNNERS), provides a musical description — a sonification — of the TRAPPIST-1 exoplanetary system. It was produced in conjunction with a study led by Tamayo that was published in ApJ Letters, exploring the dynamical stability of the TRAPPIST-1 system. ...

Convergent Migration Renders TRAPPIST-1 Long-lived - Daniel Tamayo et al

viewtopic.php?t=36874
Know the quiet place within your heart and touch the rainbow of possibility; be
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The Shredding of a Solar Filament

Postby bystander » Fri Sep 15, 2017 6:28 pm

The Shredding of a Solar Filament
NOVA | American Astronomical Society | 2017 Sep 13

Solar eruptions don’t always succeed! The Very High Angular Resolution Ultraviolet Telescope (VAULT2.0) sounding rocket captured an event in 2014 in which a solar filament was shredded by the Sun’s own magnetic forces before it had the chance to result in a coronal mass ejection. These observations, detailed in a recently published paper in ApJ led by Georgios Chintzoglou (Lockheed Martin Solar and Astrophysics Laboratory and UCAR, Boulder), mark the first time we’ve witnessed a filament being torn down by the Sun — allowing us to investigate in detail how and why this happened. Check out the video below (by NASA’s Goddard Space Flight Center/Genna Duberstein) for an overview of the failed eruption and what we learned.

Magnetic Flux Rope Shredding By a Hyperbolic Flux Tube:
The Detrimental Effects of Magnetic Topology on Solar Eruptions
- Georgios Chintzoglou et al
Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk.
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Pulsar Jackpot in a Star Cluster

Postby bystander » Fri Sep 15, 2017 6:37 pm

Pulsar Jackpot in a Star Cluster
NOVA | American Astronomical Society | 2017 Sep 15

Is Terzan 5, a star cluster that lies ~19,000 light-years away, a true globular cluster born in the Milky Way? Or are we seeing the remains of a dwarf galaxy that was captured by our galaxy? New observations by the Green Bank Telescope in West Virginia have tracked the radio signals of a treasure trove of millisecond pulsars — 36 of them — in the heart of Terzan 5. These signals can be used to trace the density distribution of the cluster, revealing where the matter resides. The observations, detailed in a recent article led by Brian Prager (University of Virginia, Charlottesville) and illustrated in the video below (credited to B. Saxton (NRAO/AUI/NSF); GBO/AUI/NSF; NASA/ESA Hubble), suggest that there is no supermassive black hole in the cluster center. This supports the idea that Terzan 5 is a true globular cluster.

Using Long-term Millisecond Pulsar Timing to Obtain Physical
Characteristics of the Bulge Globular Cluster Terzan 5
- Brian J. Prager et al

viewtopic.php?t=37557
Know the quiet place within your heart and touch the rainbow of possibility; be
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