Mystery Glow of Dark Matter Halos Fueled by Extragalactic Stars

Stars ripped from their home galaxies as they collide with other galaxies can get slung into giant invisible cocoons of dark matter, researchers say, which might explain mysterious radiation pervading the sky.

These findings suggest the halos of?dark matter?surrounding galaxies are not completely dark after all, but contain a small number of stars, investigators added.

In recent decades, satellite telescopes have detected more infrared light emanating from the sky than known galaxies could account for. Scientists had suggested this strange glow might come from sources too dim for observatories to see directly ? for instance, the earliest, most distant galaxies. If such primordial galaxies were responsible for this radiation, that might suggest far more of them existed than before thought, potentially radically altering notions of how the cosmos evolved.

Now, using NASA's Spitzer Space Telescope, astronomers have viewed a sufficiently large enough patch of sky to help shed light on this infrared glow. The researchers found that neither primordial galaxies nor faint dwarf galaxies could explain fluctuations in this excess radiation seen across space.

"We have made new measurements of the glow and found it to be brighter in intensity by several orders of magnitude than the first galaxies," study lead author Asantha Cooray, a cosmologist at the University of California, Irvine, told SPACE.com.

Instead, the researchers suggest wandering stars in the gargantuan spherical halos of dark matter enveloping their home galaxies might be responsible for this mysterious light. Physicists think invisible, as-yet-unidentified dark matter makes up about 85 percent of all matter in the universe.

"These diffuse stripped halo stars explain the missing infrared glow," Cooray said.

These stars were likely torn from the main bodies of their galaxies during epic collisions with other galaxies. They may have also been stripped away from their original homes by other galaxies pulling at them with their gravity, just as the moon's gravity tugs at Earth's oceans to generate tides. [Photos of Great Galaxy Crashes]

"For a typical Milky Way-sized galaxy, the intensity of light coming from these halo stars is about 1 percent of the total light from that galaxy," Cooray said. "That fraction grows rapidly, to as high as 20 percent, in denser galaxy environments like galaxy groups and clusters, as collisions and tidal stripping are more frequent in dense regions of the universe."

Mostly, these stars were only exiled to the most distant outskirts of their home galaxies instead of getting hurled out into intergalactic space, trapped as they were by the gravitational pull of the dark matter halos surrounding their galaxies. Galaxies exist in dark matter halos that are much larger than the galaxies; when galaxies merge together, stars and gas sink to the middle of the resulting combined halo.

"If I sum all of the galaxies out to about a billion years since the Big Bang from today, the stripped diffuse stars contribute about 10 percent of the total infrared light intensity seen by Spitzer ? the rest is the light from galaxies," Cooray said. "The previous explanation attributed that 10 percent of unexplained intensity to primordial galaxies and stars, but the most recent estimates by a variety of authors, not just my group, are that the primordial galaxies contribute at most 0.5 percent."

Future research can see whether data from other telescopes and experiments will confirm the research team's model.

"These halo stars, while bright in the infrared, should also emit visible optical light," Cooray said. As such, the Hubble Space Telescope should be able to see these stars as well, he explained.

The scientists detailed their findings in the Oct. 25 issue of the journal Nature.

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Source: http://news.yahoo.com/mystery-glow-dark-matter-halos-fueled-extragalactic-stars-171003300.html

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PSBs cut rates, fees on home, auto loans to hike loan disbursal ...

Following finance minister P. Chidambaram's plea to banks to take steps to accelerate growth in banking sector, public sector banks have responded by either reducing the interest rates or by eliminating the processing fees on car and home loans to increase demand in the market.

It is reported that the finance minster is happy with the steps taken by the banks. At a recent meeting held by the minister with the chiefs of various public sector banks, he is said to have urged banks to introduce reduced interest rates on various loans to accelerate growth in retail loans segment.

The banks which have heeded finance minister's advice include banks like Bank of India, Central Bank of India, Canara Bank, Indian bank, Allahabad Bank and Bank of Baroda. These lenders have introduced interest rate cuts in home loans or car loans or have slashed their processing fees completely on these loans.

Source: http://www.rupeetimes.com/news/home_loans/psbs_cut_rates_fees_on_home_auto_loans_to_hike_loan_disbursal_7277.html

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Prime Minister?s twitter account tweeted this pic

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Risk of death significantly higher if both mother and newborn admitted to ICU following birth

ScienceDaily (Oct. 22, 2012) ? Mothers and newborns who are both admitted to an intensive care unit (ICU) after delivery are significantly more likely to die compared with mom-baby pairs not needing ICU admission, found a study in CMAJ (Canadian Medical Association Journal). As well, when both mother and baby require admission to an ICU, they are much more likely to be managed at different hospitals, thereby negatively impacting maternal-infant bonding.

Researchers completed a population-based study of all 1.02 million live born singleton deliveries in Ontario between 2002 and 2010. They found that infant mortality was 28 times higher and maternal death 330 times higher when a newborn was admitted to a neonatal ICU (NICU) while its mother was admitted to an adult ICU -- collectively called "co-ICU" -- than when neither mom nor baby was admitted to an ICU. Separation of mother and infant soon after birth was 31 times more common with co-ICU than no ICU, because one or both needed to be transferred to another hospital.

"In addition to being at high risk of death, newborns admitted to the NICU experience long-term morbidity," writes lead author Dr. Joel Ray, Departments of Medicine, and Obstetrics and Gynaecology, St. Michael's Hospital, and the Institute for Clinical Evaluative Sciences. "This produces a great deal of stress for the parents." When the mother requires admission to an ICU as well, she may be unable to care for, or bond with, her baby. This can have long-term implications for mother-child bonding.

To explain the higher risk of death for mothers and babies both admitted to an ICU, the authors suggest that "abnormalities of the maternal and fetal placental circulations may often co-exist, and a diseased placenta may adversely affect mother and fetus alike. Placental dysfunction may result in preeclampsia, placental abruption and placental infarction, paralleled by an increased rate of preterm cesarean delivery and involvement of the maternal hepatic, cardiac, renal and cerebral systems."

Coordination of care plans by ICU staff for mothers and babies in their respective ICUs, especially by trained social workers, as well as efforts to transfer mothers and babies to the same hospital, may help lessen the burden of maternal-newborn separation.

The authors conclude that "co-ICU admission may be one optimal marker of maternal and infant morbidity and mortality beyond maternal ICU or NICU admission alone."

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The above story is reprinted from materials provided by Canadian Medical Association Journal, via EurekAlert!, a service of AAAS.

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Journal Reference:

1. Joel G. Ray, Marcelo L. Urquia, Howard Berger, Marian J. Vermeulen. Maternal and neonatal separation and mortality associated with concurrent admissions to intensive care units. CMAJ, 2012 DOI: 10.1503/cmaj.121283

Note: If no author is given, the source is cited instead.

Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_health/~3/0EMMsnHnTDg/121022122048.htm

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Susan Sarandon: Vote So 'Old Folks' Don't Decide Your Fate

'You've gotta get out there and have a voice,' actress tells MTV News as part of our Power of 12 countdown to Election Day on November 6.
By Amy Wilkinson, with reporting by Kara Warner

Susan Sarandon
Photo: MTV News

Source: http://www.mtv.com/news/articles/1695915/susan-sarandon-young-voters-advice.jhtml

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Melissa Rycroft Injured During 'DWTS' Rehearsal

It's all fun and games rehearsing for Dancing with the Stars -- until someone gets hurt. The latest victim on the injury-prone reality show is Melissa Rycroft.

Source: http://www.ivillage.com/melissa-rycroft-injured-during-dancing-stars-rehearsal/1-a-495812?dst=iv%3AiVillage%3Amelissa-rycroft-injured-during-dancing-stars-rehearsal-495812

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Protesters break into grounds of Libya's parliament

TRIPOLI (Reuters) - About 500 protesters broke into the grounds of Libya's parliament building on Sunday to demand an end to violence in Bani Walid, a former stronghold of the late Muammar Gaddafi that is being shelled by militiamen from a rival town.

Militias, many from Misrata and aligned with the Defence Ministry, have been shelling the hilltop town of 70,000 people for several days. State news agency LANA said on Sunday that 22 people had been killed and 200 wounded in the fighting.

"We are here to demand the government find a peaceful solution for the tribal war that is happening in Bani Walid," protester Nasser Ehdein said.

Libya's new rulers have held elections but have struggled to impose their authority on a country awash with weapons a year after Gaddafi was killed and the fighting in Bani Walid underscored how tenuous their control remains.

In a country where rumors abound, there were also conflicting reports over the weekend about the fate of Gaddafi's son Khamis and that of the late autocrat's former spokesman.

In Tripoli, an unarmed group of male and female protesters forced their way past security guards at the gates of the grounds of the parliament buildings, chanting "There is no God but God, and President (Mohammed) Magarief is God's enemy."

Security forces fired rounds into the air as they held their positions at the doors of the building, while elected members of the General National Congress met inside.

Ehdein said most of the protesters were residents of Tripoli who had family in or hailed from Bani Walid.

This is the second time protesters have broken into the grounds of the assembly since it took power in the summer.

The first time was on October 4 when a group of protesters who believed their town was underrepresented in a proposed Libyan government stormed the assembly as it prepared to scrutinize the prime minister-elect's nominations.

In the port city of Benghazi anger boiled over on Sunday night where about 400 unarmed but angry protesters stormed the grounds of private Libyan satellite channel Libya al-Ahrar.

The protesters demanded that the channel air photographic evidence that Gaddafi's son Khamis had been killed in battle. Libyan officials had announced he had been killed in fighting in Bani Walid but that has not been confirmed.

Demonstrators said they were furious over what they deemed a false rumor, saying it had helped fuel violence in Bani Walid and stir up tribal enmity.

Bani Walid was one of the towns that remained loyal to Gaddafi the longest. It remains isolated from the rest of Libya and former rebels say there are still pockets of support for the old government there.

ROCKETS

In Bani Walid itself, 140 km (86 miles) south of Tripoli, militia leader Abdelkarim Ghomaid said fighting was in full swing.

"The shelling is coming from all sides," he said by phone.

A Bani Walid resident said by phone: "Fighting is continuing today. There is smoke rising over certain parts of the city."

Outside Bani Walid, hundreds of vehicles lined up in the village of Weshtata, 80 km (50 miles) from Tripoli, waiting to be checked by government forces as families fled the fighting.

"We are escaping the danger of the rockets, the shrapnel, and the deaths inside. There hasn't been electricity for days," said one man who had his family in a pick-up truck.

A feud between Misrata and Bani Walid was inflamed by the death of rebel Omran Shaban after he was detained for two months in Bani Walid. Shaban, from Misrata, was the man who found Gaddafi hiding in a drain pipe in Sirte on October 20, 2011.

Libya's congress ordered the Defence and Interior Ministries to find those responsible for abducting Shaban and suspected of torturing him. It gave Bani Walid a deadline to hand them over.

Hundreds of families have fled the fighting in Bani Walid to Tarhouna, some 80 km away, where a statement from the prime minister's office on Saturday said militias had captured former Gaddafi spokesman Moussa Ibrahim.

However, in an audio clip posted on Facebook, a person purporting to be Ibrahim, who held news conferences in Tripoli during the war, dismissed news of his arrest.

There was no independent verification of the authenticity or timing of the Facebook post, dated October 20.

Some officials said Gaddafi's son Khamis had been captured in Bani Walid and died after being taken to Misrata. But there was no official written statement from the government on this, as with previous captures of former Gaddafi-era figures.

On Sunday, Deputy Prime Minister Mustafa Abushagur said on his official Twitter account that the announcement of Ibrahim's arrest and Khamis's death was made without confirmation of the news.

Khamis was reported dead on at least three separate occasions during last year's conflict. A Syrian-based television station that supported Gaddafi said he had been killed in fighting southeast of Tripoli on August 29, 2011.

(Additional reporting by Hadeel al-Shalchi, Marie-Louise Gumuchian and Reuters Television; Editing by Alison Williams and Andrew Osborn)

Source: http://news.yahoo.com/protesters-break-grounds-libyas-parliament-004512282.html

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