Archive Pages Design$type=blogging

Astronomers Find Hair Growing on Black Holes Before They Go Bald Again — Really!

Welcome to another edition of “Things in astronomy that sound dirty.” You know: moon, galactic bulge, greatest elongation, big bang, astron...

>

Welcome to another edition of “Things in astronomy that sound dirty.” You know: moon, galactic bulge, greatest elongation, big bang, astronomical unit … you get the idea. (Feel free to add your own.) Today’s astronomical innuendo? (Yes, Beavis, ‘innuendo’ sounds dirty too … heh-heh. Now, back to astronomy.) Black hole hair. Believe it or not, it has a cousin – bald black hole. Yes, these are real terms and, proving once again that you can get funding for just about anything, a group of astronomers has been studying them and recently had their results published. No, the publication is not X-rated, but this story will probably have a few more innuendos before it’s over.

“It has been shown recently that extreme Reissner-Nordström black holes perturbed by a minimally coupled, free, massless scalar field have permanent scalar hair. The hair, a conserved charge calculated at the black hole’s event horizon, can be measured by a certain expression at future null infinity: The latter approaches the hair inversely in time. We generalize this newly discovered hair also for extreme Kerr black holes. We study the behavior of nearly extreme black hole hair and its measurement at future null infinity as a transient phenomenon.”

OK, let’s get some non-dirty terms defined. Reissner-Nordström black holes are black holes with mass and electric charge but no spin. ‘Perturbed’ means subjected to a force other than gravity. ‘Scalar hair’ is a peculiarity unique to a single black hole that makes it distinguishable from others. ‘Extreme black holes’ are the smallest possible black holes that can exist while rotating at a given fixed constant speed. For years, astronomers have ascribed to the “no-hair theorem” of black holes which states that all black holes can be characterized by only three externally observable parameters: mass, electric charge, and angular momentum. Anything else is referred to as black hole ‘hair’ and is sucked into the black hole horizon before it can be observed.

Except …

This new study led by Lior Burko, a physicist at Theiss Research in California and published in Physical Review Research, found that two types of black holes can grow hair, but then quickly go bald again. (A condition many guys can relate to.) Nearly extreme Reissner-Nordström black holes, which have almost the maximum possible electric charge but don’t rotate, and nearly extreme Kerr black holes, which rotate at nearly maximum spin but have no electric charge, were modeled and found to have temporary hair (distinguishing characteristics) growth that quickly fell out (or in this case, fell in).

Is this a big deal, Lior? He tells LiveScience:

“This is an interesting find, because it’s a transient behavior.”

Well, that was enough to get funding and now other astronomers on other black hole projects (studying black holes, not throwing money into one, although they’re sometimes the same thing) have something else to look for. The Laser Interferometer Gravitational-Wave Observatory (LIGO) measuring gravitational waves created by black holes is one, as is the planned Laser Interferometer Space Antenna (LISA) project for detecting gravitational waves from supermassive black holes. Like water circling the drain in a shower, these gravitational waves could show some black hair.

I can get that hair out for you.

This is why the Buttheads of the world never become astronomers. Everything they think is hilarious is usually a real astronomical term. What fun is that?

They also make great band names. Like ‘The Astronomical Unit’.

COMMENTS

Loading...
Name

Âm Nhạc Ẩm Thực Angela Phương Trinh Angelina Jolie Bảo Thy benh-gan Bộ Ảnh - Video Brad Pitt Bùa Ngải Bước Nhảy Hoàn Vũ cac-benh-ve-gan Cao Thái Sơn Chi Pu Chuyện chỉ có ở Trung Quốc Chuyện kỳ lạ về trẻ em Chuyện Lạ Chuyện lạ bốn phương chọn lọc Chuyện lạ cảm động về các loài vật Chuyện lạ khó tin nhưng lại có thật Chuyện lạ ở Nhật Bản Chuyện lạ thế giới khó tin nhưng có thật Chuyện lạ về các loài vật Chuyện lạ về các tài năng hiếm có Chuyện lạ về chó và mèo Chuyện lạ về du lịch Chuyện lạ về hôn nhân - vợ chồng Chuyện lạ về những kỷ lục giảm cân Chuyện lạ về sữa Chuyện lạ Việt Nam có thật Cine Cộng Đồng Mạng Công Nghệ Cung Hoàng Đạo Cường Đô La Đàm Vĩnh Hưng Đàn Ông Đặng Thu Thảo dang-mieng Đĩa Bay Diễm My 9x Điện Ảnh Diệp Lâm Anh Đỗ Mạnh Cường Đời Sống doi-song Đông Nhi Đồng Tính Động Vật Du Lịch Đức Phúc fashion Gay Giảm cân Giáo Dục Giới Trẻ Hồ Ngọc Hà Hoa Hậu Hòa Minzy Hoài Linh Hoàng Thùy Linh Học Tiếng Anh hoc-duong Hot News HotNews Hương Giang Idol Hương Tràm Huỳnh Hiểu Minh Issac Jennifer Phạm Jessica Minh Anh Kenbi Khánh Phạm Khám Phá kham-pha Khánh Hiền Khmer News khoa-hoc khoa-hoc-cong-nghe Khoảnh Khắc Lan Khuê Lazada Lê Xuân Tiền Lều Phương Anh Linh Nga Lý Hải Mai Phương Thúy Maria Ozawa Mẹo Vặt Midu Minh Hằng Miu Lê Món ngon mỗi ngày Mọt Phim Musik Mỹ Linh Mỹ Tâm News Ngô Kiến Huy Ngọc Trinh Người ngoài hành tinh Nhật Kim Anh Những chuyện kỳ quặc trên thế giới Những hiện tượng bí ẩn và khó hiểu Những người có khả năng đặc biệt Noo Phước Thịnh Ốc Thanh Vân oto-xe-may Phạm Băng Băng Phạm Hương Phẫu Thuật Thẩm Mỹ Phong cách Phượng Channel Pokémon Go Quang Dũng Sao Shopping Sĩ Thanh Sơn Tùng M-TP sport Star Sức Khỏe suc-khoe suc-khoe-gioi-tinh Tâm Linh Tâm Sự Tăng Thanh Hà Taylor Swift Thanh Hằng Thành Lộc Thanh Thảo The Face - Gương mặt thương hiệu Thể Hình The Remix – Hòa Âm Ánh Sáng the-gioi Thời Trang Thu Minh Thu Phương Thượng Ẩn Thúy Nga Tin Nổi Bật Tin Nóng Tin Thế Giới Tin Trong Nước Tình Yêu Tom Cruise Trà Ngọc Hằng Trấn Thành Trường Giang Trương Nam Thành Tử Vi tv-show UFO Ung Thư Video Việt Hương Vietnam's Next Top Model Vĩnh Thụy Võ Cảnh Võ Hoàng Yến Vũ Khắc Tiệp Vũ Ngọc Anh Vũ Ngọc Đãng xa-hoi xe xo-gan Xu Hướng - Làm Đẹp
false
ltr
item
GIẢI TRÍ SAO 24H: Astronomers Find Hair Growing on Black Holes Before They Go Bald Again — Really!
Astronomers Find Hair Growing on Black Holes Before They Go Bald Again — Really!
https://mysteriousuniverse.org/wp-content/uploads/2019/11/fractal-1280110_1920-643x440.jpg
GIẢI TRÍ SAO 24H
https://www.giaitrisao24h.com/2019/11/astronomers-find-hair-growing-on-black.html
https://www.giaitrisao24h.com/
https://www.giaitrisao24h.com/
https://www.giaitrisao24h.com/2019/11/astronomers-find-hair-growing-on-black.html
true
5412201294335186192
UTF-8
Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All BÀI CÙNG CHỦ ĐỀ LABEL ARCHIVE SEARCH Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago