{"id":9466,"date":"2018-04-13T10:49:08","date_gmt":"2018-04-13T03:49:08","guid":{"rendered":"http:\/\/ttud.com.vn\/?p=9466"},"modified":"2018-04-13T10:49:08","modified_gmt":"2018-04-13T03:49:08","slug":"phat-hien-ra-ngan-ha-gan-nhu-khong-co-vat-chat-toi-gioi-thien-van-hoc-dau-dau-khong-hieu-tai-sao","status":"publish","type":"post","link":"https:\/\/casta.ttud.com.vn\/index.php\/phat-hien-ra-ngan-ha-gan-nhu-khong-co-vat-chat-toi-gioi-thien-van-hoc-dau-dau-khong-hieu-tai-sao\/","title":{"rendered":"Ph\u00e1t hi\u1ec7n ra ng\u00e2n h\u00e0 g\u1ea7n nh\u01b0 kh\u00f4ng c\u00f3 v\u1eadt ch\u1ea5t t\u1ed1i, gi\u1edbi thi\u00ean v\u0103n h\u1ecdc \u0111au \u0111\u1ea7u kh\u00f4ng hi\u1ec3u t\u1ea1i sao"},"content":{"rendered":"

V\u1eadt ch\u1ea5t t\u1ed1i v\u1ed1n \u0111\u00e3 r\u1ea5t kh\u00f3 hi\u1ec3u m\u00e0 sau ph\u00e1t hi\u1ec7n ng\u00e0y m\u1edbi n\u00e0y, n\u00f3 l\u1ea1i c\u00e0ng g\u00e2y b\u1ed1i r\u1ed1i h\u01a1n n\u1eefa. C\u00e1c nh\u00e0 thi\u00ean v\u0103n h\u1ecdc kh\u00e1m ph\u00e1 ra m\u1ed9t d\u1ea3i ng\u00e2n h\u00e0 g\u1ea7n nh\u01b0 kh\u00f4ng c\u00f3 m\u1ed9t ch\u00fat v\u1eadt ch\u1ea5t t\u1ed1i n\u00e0o.<\/p>\n

N\u00f3i th\u1eadt ra th\u00ec, ta v\u1eabn ch\u01b0a ch\u1eafc ch\u1eafn “v\u1eadt ch\u1ea5t t\u1ed1i” l\u00e0 th\u1ee9 g\u00ec, nh\u01b0ng \u1edf th\u1eddi \u0111i\u1ec3m hi\u1ec7n t\u1ea1i, n\u00f3 l\u00e0 l\u1eddi gi\u1ea3i th\u00edch h\u1ee3p l\u00fd nh\u1ea5t cho nh\u1eefng hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00fd, nh\u1eefng h\u1ecdc thuy\u1ebft v\u1eadt l\u00fd v\u0169 tr\u1ee5 m\u00e0 ta v\u1eabn s\u1eed d\u1ee5ng v\u00e0 v\u1eabn \u0111\u00fang. \u0110a s\u1ed1 c\u00e1c ng\u00e2n h\u00e0 \u0111\u01b0\u1ee3c cho l\u00e0 c\u00f3 l\u01b0\u1ee3ng v\u1eadt ch\u1ea5t t\u1ed1i nhi\u1ec1u h\u01a1n v\u1eadt ch\u1ea5t th\u00f4ng th\u01b0\u1eddng. Khoa h\u1ecdc v\u1ed1n v\u1eadn h\u00e0nh nh\u01b0 v\u1eady \u0111\u00f3.<\/p>\n

D\u1ea3i ng\u00e2n h\u00e0 n\u00e0y ch\u1ee9a qu\u00e1 \u00edt v\u1eadt ch\u1ea5t t\u1ed1i \u0111\u1ec3 m\u00e0 c\u00f3 th\u1eadt, v\u00e0 \u0111i\u1ec1u n\u00e0y \u0111ang l\u00e0m \u0111au \u0111\u1ea7u c\u00e1c nh\u00e0 thi\u00ean v\u0103n h\u1ecdc.<\/p>\n

\n
\"Ph\u00e1t<\/div>\n
<\/div>\n<\/div>\n

D\u1ef1a theo nh\u1eefng kh\u00e1i ni\u1ec7m ta \u0111ang s\u1eed d\u1ee5ng v\u1ec1 s\u1ef1 ti\u1ebfn h\u00f3a c\u1ee7a d\u1ea3i ng\u00e2n h\u00e0, th\u00ec v\u1eadt ch\u1ea5t t\u1ed1i kh\u00f4ng ch\u1ec9 \u0111\u01a1n gi\u1ea3n l\u00e0 th\u00e0nh ph\u1ea7n m\u00e0 c\u00f2n l\u1ea1i y\u00eau c\u1ea7u quan tr\u1ecdng \u0111\u1ec3 t\u1ea1o n\u00ean m\u1ed9t d\u1ea3i ng\u00e2n h\u00e0. Ng\u00e2n h\u00e0 m\u1edbi \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n n\u00e0y c\u00f3 t\u00ean NGC1052-DF2 n\u1eb1m c\u00e1ch ta 65 tri\u1ec7u n\u0103m \u00e1nh s\u00e1ng, n\u1eb1m t\u1ea1i khu v\u1ef1c ch\u00f2m sau Cetus.<\/p>\n

K\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd c\u1ee7a n\u00f3 c\u0169ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi D\u1ea3i Ng\u00e2n h\u00e0, nh\u01b0ng l\u01b0\u1ee3ng sao c\u1ee7a n\u00f3 \u00edt h\u01a1n h\u1eb3n, t\u1ec9 l\u1ec7 l\u00e0 1\/200 \u2013 c\u1ee9 200 sao trong D\u1ea3i Ng\u00e2n h\u00e0 m\u1edbi c\u00f3 1 sao t\u1ea1i NGC 1052-DF2. Ng\u00e2n h\u00e0 n\u00e0y th\u01b0a \u0111\u1ebfn m\u1ee9c ta c\u00f3 th\u1ec3 nh\u00ecn xuy\u00ean qua n\u00f3, sang nh\u1eefng ng\u00e2n h\u00e0 \u0111\u1eb1ng sau.<\/p>\n

V\u1eeba \u00edt sao l\u1ea1i v\u1eeba \u00edt v\u1eadt ch\u1ea5t t\u1ed1i, n\u00ean l\u00e0 ng\u00e2n h\u00e0 NGC 1052-DF2 c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng r\u1ea5t th\u1ea5p.<\/p>\n

\n
\"Ph\u00e1t<\/div>\n
<\/div>\n<\/div>\n

“Vi\u1ec7c t\u00ecm \u0111\u01b0\u1ee3c m\u1ed9t ng\u00e2n h\u00e0 m\u00e0 kh\u00f4ng c\u00f3 v\u1eadt ch\u1ea5t t\u1ed1i l\u00e0 \u0111i\u1ec1u b\u1ea5t ng\u1edd v\u1edbi ch\u00fang t\u00f4i b\u1edfi l\u1ebd th\u1ee9 v\u1eadt ch\u1ea5t v\u00f4 h\u00ecnh, b\u00ed \u1ea9n n\u00e0y \u0111\u00e1ng l\u1ebd ph\u1ea3i l\u00e0 th\u1ee9 chi\u1ebfm ph\u1ea7n nhi\u1ec1u trong b\u1ea5t c\u1ee9 ng\u00e2n h\u00e0 n\u00e0o<\/i>“, tr\u01b0\u1edfng ban nghi\u00ean c\u1ee9u, gi\u00e1o s\u01b0 Pieter van Dokkum t\u1eeb \u0110\u1ea1i h\u1ecdc Yale ph\u00e1t bi\u1ec3u.<\/p>\n

“Nhi\u1ec1u th\u1eadp k\u1ec9 nay, ch\u00fang ta v\u1eabn ngh\u0129 r\u1eb1ng ng\u00e2n h\u00e0 b\u1eaft ngu\u1ed3n t\u1eeb m\u1ed9t c\u1ee5m v\u1eadt ch\u1ea5t t\u1ed1i. Sau \u0111\u00f3 m\u1ecdi th\u1ee9 m\u1edbi b\u1eaft \u0111\u1ea7u h\u00ecnh th\u00e0nh: kh\u00ed gas t\u00edch t\u1ee5 l\u1ea1i quanh c\u00e1c qu\u1ea7ng s\u00e1ng c\u1ee7a v\u1eadt ch\u1ea5t t\u1ed1i, kh\u00ed gas bi\u1ebfn th\u00e0nh nh\u1eefng ng\u00f4i sao, ch\u00fang l\u1edbn d\u1ea7n l\u00ean v\u00e0 t\u1ea1o th\u00e0nh m\u1ed9t ng\u00e2n h\u00e0, gi\u1ed1ng nh\u01b0 D\u1ea3i Ng\u00e2n h\u00e0 n\u00e0y v\u1eady. NGC 1052-DF2 \u0111i ng\u01b0\u1ee3c l\u1ea1i v\u1edbi kh\u00e1i ni\u1ec7m s\u1ef1 h\u00ecnh th\u00e0nh c\u1ee7a c\u00e1c ng\u00e2n h\u00e0<\/i>“.<\/p>\n

Nh\u01b0ng b\u00ean c\u1ea1nh \u0111\u00f3, ng\u00e2n h\u00e0 n\u00e0y \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong nghi\u00ean c\u1ee9u v\u1eadt ch\u1ea5t t\u1ed1i. N\u00f3 kh\u00f4ng c\u00f3 nhi\u1ec1u v\u1eadt ch\u1ea5t t\u1ed1i nh\u01b0ng v\u1eabn c\u00f3 sao, NGC 1052-DF2 gi\u00fap ta ch\u1ee9ng minh \u0111\u01b0\u1ee3c r\u1eb1ng v\u1eadt ch\u1ea5t t\u1ed1i th\u1ef1c s\u1ef1 t\u1ed3n t\u1ea1i \u1edf c\u00e1c ng\u00e2n h\u00e0 kh\u00e1c v\u00e0 v\u1eadt ch\u1ea5t t\u1ed1i kh\u00e1c bi\u1ec7t v\u1edbi v\u1eadt ch\u1ea5t c\u00f3 t\u00ednh baryon \u2013 m\u1ed9t h\u1ea1t h\u1ea1 nguy\u00ean t\u1eed h\u1ee3p l\u1ea1i t\u1eeb 3 quark.<\/p>\n

Gi\u00e1o s\u01b0 van Dokkum v\u00e0 \u0111\u1ed9i ng\u0169 nghi\u00ean c\u1ee9u c\u1ee7a m\u00ecnh ph\u00e1t hi\u1ec7n ra ng\u00e2n h\u00e0 n\u00e0y nh\u1edd D\u00e0n K\u00ednh vi\u1ec5n v\u1ecdng Dragonfly, v\u1ed1n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 b\u1eaft \u0111\u01b0\u1ee3c h\u00ecnh \u1ea3nh c\u1ee7a nh\u1eefng v\u1eadt th\u1ec3 m\u1edd trong V\u0169 tr\u1ee5. Sau khi ph\u00e1t hi\u1ec7n ra ng\u00e2n h\u00e0 n\u00e0y t\u1ed3n t\u1ea1i, h\u1ecd s\u1ebd d\u1ee5ng nh\u1eefng k\u00ednh vi\u1ec5n v\u1ecdng kh\u00e1c \u0111\u1ec3 nh\u00ecn v\u00e0o b\u00ean trong n\u00f3, x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c k\u00edch th\u01b0\u1edbc l\u1edbn v\u00e0 t\u00ednh nh\u1ea5t m\u1edd nh\u1ea1t c\u1ee7a n\u00f3.<\/p>\n

\n
\"Ph\u00e1t<\/div>\n
\n

D\u00e0n k\u00ednh Dragonfly.<\/p>\n<\/div>\n<\/div>\n

\n
\"Ph\u00e1t<\/div>\n
\n

D\u00e0n k\u00ednh Dragonfly.<\/em><\/p>\n<\/div>\n<\/div>\n

\u0110i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh c\u1ee7a ng\u00e2n h\u00e0 n\u00e0y so v\u1edbi c\u00e1c ng\u00e2n h\u00e0 kh\u00e1c m\u00e0 ta bi\u1ebft t\u1edbi th\u1eddi \u0111i\u1ec3m n\u00e0y l\u00e0 l\u01b0\u1ee3ng v\u1eadt ch\u1ea5t t\u1ed1i \u00edt \u1ecfi c\u1ee7a n\u00f3.<\/p>\n

“C\u1ee9 t\u01b0\u1edfng t\u01b0\u1ee3ng b\u1ea1n l\u1ea5y m\u1ed9t ng\u00e2n h\u00e0 m\u00e0 ch\u1ec9 c\u00f3 c\u00e1c qu\u1ea7n sao v\u00e0 c\u00e1c c\u1ee5m tr\u00f2n, ch\u1ee9 ch\u1eb3ng c\u00f3 c\u00e1i g\u00ec kh\u00e1c c\u1ea3<\/i>“, \u00f4ng van Dokkum n\u00f3i.<\/p>\n

“Kh\u00f4ng c\u00f3 h\u1ecdc thuy\u1ebft n\u00e0o c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c vi\u1ec7c nh\u1eefng ng\u00e2n h\u00e0 t\u01b0\u01a1ng t\u1ef1 nh\u01b0 th\u1ebf n\u00e0y t\u1ed3n t\u1ea1i. N\u00f3 ho\u00e0n to\u00e0n l\u00e0 m\u1ed9t b\u00ed \u1ea9n. V\u00e0 ch\u01b0a th\u1ec3 bi\u1ebft \u0111\u01b0\u1ee3c qu\u00e1 tr\u00ecnh h\u00ecnh th\u00e0nh n\u00ean ch\u00fang<\/i>“.<\/p>\n

C\u00f3 m\u1ed9t l\u1eddi gi\u1ea3i th\u00edch c\u00f3 th\u1ec3 h\u1ee3p l\u00fd: NGC 1052-DF2 n\u1eb1m trong m\u1ed9t c\u1ee5m ng\u00e2n h\u00e0 b\u1ecb chi ph\u1ed1i b\u1edfi m\u1ed9t ng\u00e2n h\u00e0 kh\u1ed5ng l\u1ed3 c\u00f3 t\u00ean NGC 1052. Theo nh\u01b0 b\u00e1o c\u00e1o nghi\u00ean c\u1ee9u, c\u00f3 th\u1ec3 c\u1ee5m ng\u00e2n h\u00e0 nh\u1ecf n\u00e0y \u0111\u01b0\u1ee3c t\u1ea1o n\u00ean b\u1edfi kh\u00ed gas v\u1ed1n \u0111ang ti\u1ebfn v\u1ec1 NGC 1052 \u0111\u1ec3 t\u1ea1o n\u00ean ng\u00e2n h\u00e0, nh\u01b0ng v\u00ec kh\u00f4ng t\u1edbi \u0111\u01b0\u1ee3c n\u01a1i, n\u00ean n\u00f3 t\u1ee5 l\u1ea1i th\u00e0nh NGC 1052-DF2.<\/p>\n

Ho\u1eb7c c\u0169ng c\u00f3 th\u1ec3 ng\u00e2n h\u00e0 n\u00e0y \u0111\u01b0\u1ee3c t\u1ea1o n\u00ean t\u1eeb kh\u00ed gas tho\u00e1t ra khi hai ng\u00e2n h\u00e0 kh\u00e1c h\u00f2a l\u00e0m m\u1ed9t. Ho\u1eb7c l\u00e0 \u0111\u00e3 c\u00f3 m\u1ed9t s\u1ef1 ki\u1ec7n g\u00ec \u0111\u00f3 x\u00f3a s\u1ed5 to\u00e0n b\u1ed9 s\u1ed1 v\u1eadt ch\u1ea5t t\u1ed1i kh\u1ecfi ng\u00e2n h\u00e0 n\u00e0y.<\/p>\n

Nh\u01b0ng nh\u1eefng gi\u1ea3 thuy\u1ebft tr\u00ean kh\u00f4ng b\u00e1c b\u1ecf \u0111\u01b0\u1ee3c s\u1ef1 k\u00ec l\u1ea1 c\u1ee7a ng\u00e2n h\u00e0 NGC 1052-DF2. \u0110\u1ed9i ng\u0169 nghi\u00ean c\u1ee9u v\u1eabn \u0111ang c\u1ed1 g\u1eafng t\u00ecm ra m\u1ed9t ng\u00e2n h\u00e0 kh\u00e1c t\u01b0\u01a1ng t\u1ef1, nh\u1eb1m l\u00e0m s\u00e1ng t\u1ecf m\u1ed9t (trong h\u00e0ng t\u1ec9 t\u1ec9) b\u00ed \u1ea9n c\u1ee7a V\u0169 tr\u1ee5 n\u00e0y.<\/p>\n

Ngu\u1ed3n: kenh14.vn<\/p>\n","protected":false},"excerpt":{"rendered":"

V\u1eadt ch\u1ea5t t\u1ed1i v\u1ed1n \u0111\u00e3 r\u1ea5t kh\u00f3 hi\u1ec3u m\u00e0 sau ph\u00e1t hi\u1ec7n ng\u00e0y m\u1edbi n\u00e0y, n\u00f3 l\u1ea1i c\u00e0ng g\u00e2y b\u1ed1i r\u1ed1i h\u01a1n n\u1eefa. C\u00e1c nh\u00e0 thi\u00ean v\u0103n h\u1ecdc kh\u00e1m ph\u00e1 ra m\u1ed9t d\u1ea3i ng\u00e2n h\u00e0 g\u1ea7n nh\u01b0 kh\u00f4ng c\u00f3 m\u1ed9t ch\u00fat v\u1eadt ch\u1ea5t t\u1ed1i n\u00e0o. N\u00f3i th\u1eadt ra th\u00ec, ta v\u1eabn ch\u01b0a ch\u1eafc ch\u1eafn “v\u1eadt […]<\/p>\n","protected":false},"author":18,"featured_media":9467,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-9466","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/9466","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/comments?post=9466"}],"version-history":[{"count":3,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/9466\/revisions"}],"predecessor-version":[{"id":9703,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/9466\/revisions\/9703"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media\/9467"}],"wp:attachment":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media?parent=9466"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/categories?post=9466"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/tags?post=9466"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}