Patterns – by Amy Lowell

Posted in Poetry with tags , , on April 14, 2019 by telescoper

I walk down the garden paths,
And all the daffodils
Are blowing, and the bright blue squills.
I walk down the patterned garden-paths
In my stiff, brocaded gown.
With my powdered hair and jewelled fan,
I too am a rare
Pattern. As I wander down
The garden paths.

My dress is richly figured,
And the train
Makes a pink and silver stain
On the gravel, and the thrift
Of the borders.
Just a plate of current fashion,
Tripping by in high-heeled, ribboned shoes.
Not a softness anywhere about me,
Only whalebone and brocade.
And I sink on a seat in the shade
Of a lime tree.For my passion
Wars against the stiff brocade.
The daffodils and squills
Flutter in the breeze
As they please.
And I weep;
For the lime-tree is in blossom
And one small flower has dropped upon my bosom.

And the plashing of waterdrops
In the marble fountain
Comes down the garden-paths.
The dripping never stops.
Underneath my stiffened gown
Is the softness of a woman bathing in a marble basin,
A basin in the midst of hedges grown
So thick, she cannot see her lover hiding,
But she guesses he is near,
And the sliding of the water
Seems the stroking of a dear
Hand upon her.
What is Summer in a fine brocaded gown!
I should like to see it lying in a heap upon the ground.
All the pink and silver crumpled up on the ground.

I would be the pink and silver as I ran along the paths,
And he would stumble after,
Bewildered by my laughter.
I should see the sun flashing from his sword-hilt and the buckles
on his shoes.
I would choose
To lead him in a maze along the patterned paths,
A bright and laughing maze for my heavy-booted lover,
Till he caught me in the shade,
And the buttons of his waistcoat bruised my body as he clasped me,
Aching, melting, unafraid.
With the shadows of the leaves and the sundrops,
And the plopping of the waterdrops,
All about us in the open afternoon —
I am very like to swoon
With the weight of this brocade,
For the sun sifts through the shade.

Underneath the fallen blossom
In my bosom,
Is a letter I have hid.
It was brought to me this morning by a rider from the Duke.
“Madam, we regret to inform you that Lord Hartwell
Died in action Thursday se’nnight.”
As I read it in the white, morning sunlight,
The letters squirmed like snakes.
“Any answer, Madam,” said my footman.
“No,” I told him.
“See that the messenger takes some refreshment.
No, no answer.”
And I walked into the garden,
Up and down the patterned paths,
In my stiff, correct brocade.
The blue and yellow flowers stood up proudly in the sun,
Each one.
I stood upright too,
Held rigid to the pattern
By the stiffness of my gown.
Up and down I walked,
Up and down.

In a month he would have been my husband.
In a month, here, underneath this lime,
We would have broke the pattern;
He for me, and I for him,
He as Colonel, I as Lady,
On this shady seat.
He had a whim
That sunlight carried blessing.
And I answered, “It shall be as you have said.”
Now he is dead.

In Summer and in Winter I shall walk
Up and down
The patterned garden-paths
In my stiff, brocaded gown.
The squills and daffodils
Will give place to pillared roses, and to asters, and to snow.
I shall go
Up and down,
In my gown.
Gorgeously arrayed,
Boned and stayed.
And the softness of my body will be guarded from embrace
By each button, hook, and lace.
For the man who should loose me is dead,
Fighting with the Duke in Flanders,
In a pattern called a war.
Christ! What are patterns for?

by Amy Lowell (1874-1925)

A Prominence from Principe

Posted in History, The Universe and Stuff with tags , , , , on April 13, 2019 by telescoper

While I seem to be on a little run of posts about the 1919 Eclipse I thought I’d share the above photograph, taken at Principe, that shows that the bending of light from stars was not the only observation made at this eclipse. At the top of the figure you can see a wonderful example of a solar prominence..

The Mystery Object Revealed

Posted in History, The Universe and Stuff with tags , , , , , on April 12, 2019 by telescoper

As I revealed this afternoon in my talk at the Royal Astronomical Society, yesterday’s mystery object..

..is in fact the 4-inch object (geddit?) glass that was manufactured by Howard Grubb in Dublin and taken to Sobral in Brazil in 1919 to be used in a famous experiment to measure the bending of light by the Sun during a total eclipse.

Here is a picture of the observing setup in Sobral:

The 4-inch lens is mounted in the square tube on the right. The eclipse was observed using a coelostat (a steerable mirror) that reflected light into the telescopes. Here is a photograph of the coelostat:

The object glass and coelostat are usually on display at Dunsink Observatory but these are currently en route to Brazil for the commemorations of the centenary of the historic expedition.

Photo Credits to Tom Ray of DIAS…

Mystery Object

Posted in History, The Universe and Stuff on April 11, 2019 by telescoper

I’ve had a very busy day today and am now about to dash off again so I’ll just post this picture to see if anyone can guess what the mystery object is..

Answers through the Comments Box please!

Results from the Event Horizon Telescope

Posted in Astrohype, The Universe and Stuff with tags , , on April 10, 2019 by telescoper

Following yesterday’s little teaser, let me point out that there is a press conference taking place today (at 2pm Irish Summer Time, that’s 3pm Brussels) to announce a new result from the Event Horizon Telescope. The announcement will be streamed live here.

Sadly, I’m teaching at the time of the press conference so I won’t be able to watch, but that doesn’t mean that you shouldn’t!

I’ll post pictures and comments when I get back. Watch this space. Or you could watch this video..

UPDATE: Well, there we are. Here is the image of the `shadow’ of the event horizon around the black hole in M87:

The image is about 42 micro arcseconds across. I guess to people brought up on science fiction movies with fancy special effects the image is probably a little underwhelming, but it really is an excellent achievement to get that resolution. Above all, it’s a great example of scientific cooperation – 8 different telescopes all round the world. The sizeable European involvement received a substantial injection of funding from the European Union too!

Other parameters are here:

The accompanying EU press release is here. Further information can be found here. The six publications relating to this result can be found here:

The Shadow of an Event Horizon

Posted in The Universe and Stuff with tags , , , , , on April 9, 2019 by telescoper

There is a paper on the arXiv written about 5 years ago called Towards the event horizon – the supermassive black hole in the Galactic Center by Falcke and Markoff, the abstract of which reads:

The center of our Galaxy hosts the best constrained supermassive black hole in the universe, Sagittarius A* (Sgr A*). Its mass and distance have been accurately determined from stellar orbits and proper motion studies, respectively, and its high-frequency radio, and highly variable near-infrared and X-ray emission originate from within a few Schwarzschild radii of the event horizon. The theory of general relativity (GR) predicts the appearance of a black hole shadow, which is a lensed image of the event horizon. This shadow can be resolved by very long baseline radio interferometry and test basic predictions of GR and alternatives thereof. In this paper we review our current understanding of the physical properties of Sgr A*, with a particular emphasis on the radio properties, the black hole shadow, and models for the emission and appearance of the source. We argue that the Galactic Center holds enormous potential for experimental tests of black hole accretion and theories of gravitation in their strong limits.

Please note that the black hole in the centre of the giant elliptical galaxy M87 is about 1000 times further away from us than the black hole in the centre of the Milky Way but is also about 1000 times more massive, so its Schwarzschild radius is 1000 times larger. The observational challenge of imaging the event horizon is therefore similar in the two cases.

You may find this useful if, by sheer coincidence, there is some big announcement tomorrow..

Gravitational Wave Flash!

Posted in The Universe and Stuff with tags , , , , on April 9, 2019 by telescoper

The third observing run for Advanced LIGO – O3 – started on April 1 2019, after 19 months upgrading the detectors. Last night, April 8, saw the first new detection of a candidate gravitational wave source, apparently another black hole binary, dubbed S190408an.

It is anticipated that sources like this will be discovered at a rate of roughly one per week for the (planned) year-long run. Given the likely rate of events the policy of LIGO is now to make data publicly available directly without writing papers first. You can find the data entry for this event here, including this map of its position.

Whether the LIGO Scientific Collaboration will release sufficient data for others to perform a full analysis of the signal remains to be seen, but if the predicted detection rate matches reality, the field is going to move very rapidly from studies of individual events to statistical analysis of large populations. Such is the way of science!

This is not an Animation…

Posted in Art with tags , on April 8, 2019 by telescoper

To find out more about this optical illusion, which was created by Yurii Peripedia using nothing more complicated than Adobe Illustrator, see here.

The Arthritic Cosmological Principle

Posted in Biographical with tags , on April 7, 2019 by telescoper

When I attended a meeting recently quite a few people expressed concern about my health given that I turned up with a walking-stick. I’ve actually been using one on occasions for quite a few months now, and it may well become a regular accessory, so to avoid anyone else I meet wondering what’s going on I thought I’d post a brief explanation.

Over the past six months or so I’ve had an increasing problem with swelling and stiffness in my knees. This is worst in the morning when I’ve just got out of bed, in which situation my knees are invariably bright red.

You can see what I mean in the picture here (viewer discretion advised). The stiffness sometimes makes me a bit wobbly on my pins and makes it a bit tricky dealing with stairs. I use the stick more for balance than anything else, and once I get going I can walk quite comfortably. I spent most of a day walking around Copenhagen without ill effects when I visited there in February.

I’ve been to the doctor several times about this and, although I’m still waiting for various test results, it’s clear that I have some form of arthritis. For the time being I’m just taking an anti-inflammatory drug which is quite effective at reducing the swelling. In due course I may be put on other medication, possibly involving a course of injections, and maybe even surgery. I’ll just have to wait and see about that.

The important thing is that, although I’m not exactly thrilled to have arthritis, I’m not in any real pain. It’s just a bit uncomfortable, that’s all, though that does make it hard to concentrate sometimes and it has impacted on my capacity to work long hours. I am sorry that I have missed some deadlines as a result.

You may or may not know that I used to run a lot when I was younger, including a few marathons and half-marathons. This has caused me some problems with my knees before, and I had minor surgery (arthroscopy) about 15 years ago to help with this. That procedure went pretty well, but I was warned that I was a relatively high risk for arthritis. It looks like the doctor wasn’t wrong! My running days are well and truly over, that’s for sure.

One other thing worth mentioning is that this condition does seem to be highly temperature-dependent. This last week the weather suddenly turned a lot colder and the arthritis definitely got worse. Perhaps in future I could learn to use the colour of my knees as some kind of forecasting method?

Der Englische Patient

Posted in Politics with tags , , on April 7, 2019 by telescoper

I couldn’t resist sharing this brilliant cartoon by Jürgen Tomicek