[et_pb_section fb_built=”1″ _builder_version=”4.16″ _module_preset=”default” background_image=”https:\/\/www.ieec.cat\/wp-content\/uploads\/2022\/02\/slider-comunicacio.jpg” max_height=”130px” custom_padding=”0px||0px||false|false” da_disable_devices=”off|off|off” global_colors_info=”{}” da_is_popup=”off” da_exit_intent=”off” da_has_close=”on” da_alt_close=”off” da_dark_close=”off” da_not_modal=”on” da_is_singular=”off” da_with_loader=”off” da_has_shadow=”on”][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.16″ _module_preset=”default” custom_padding=”24px||11px|||” da_disable_devices=”off|off|off” global_colors_info=”{}” da_is_popup=”off” da_exit_intent=”off” da_has_close=”on” da_alt_close=”off” da_dark_close=”off” da_not_modal=”on” da_is_singular=”off” da_with_loader=”off” da_has_shadow=”on”][et_pb_row _builder_version=”4.16″ _module_preset=”default” custom_padding=”||||false|false” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text admin_label=”Unitats de recerca” _builder_version=”4.16″ _dynamic_attributes=”content” _module_preset=”default” text_font=”|700||on|||||” text_font_size=”16px” header_font=”|700|||||||” custom_margin=”||10px||false|false” header_font_size_tablet=”28px” header_font_size_phone=”26px” header_font_size_last_edited=”on|phone” global_colors_info=”{}”]@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoiY3VzdG9tX21ldGFfb3JnYW5pemFjaW9uZXMiLCJzZXR0aW5ncyI6eyJiZWZvcmUiOiIiLCJhZnRlciI6IiIsImVuYWJsZV9odG1sIjoib2ZmIn19@[\/et_pb_text][et_pb_post_title author=”off” categories=”off” comments=”off” featured_image=”off” admin_label=”T\u00edtol i data” _builder_version=”4.27.2″ _module_preset=”default” title_font=”Cairo|300|||||||” title_font_size=”40px” meta_font=”||on||||||” meta_font_size=”16px” title_font_size_tablet=”35px” title_font_size_phone=”30px” title_font_size_last_edited=”on|desktop” global_colors_info=”{}”][\/et_pb_post_title][et_pb_text admin_label=”Subt\u00edtols” _builder_version=”4.27.2″ _module_preset=”default” text_font=”Source Sans Pro||on||||||” text_font_size=”24px” text_line_height=”1.1em” text_font_size_tablet=”22px” text_font_size_phone=”20px” text_font_size_last_edited=”on|phone” global_colors_info=”{}”]<\/p>\n
[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”1_2″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_post_title title=”off” meta=”off” _builder_version=”4.16″ _module_preset=”default” custom_margin=”||0px||false|false” border_width_top=”10px” border_color_top=”#406fda” global_colors_info=”{}”][\/et_pb_post_title][et_pb_text _builder_version=”4.27.2″ _module_preset=”default” text_font=”||||||||” text_font_size=”15px” text_line_height=”1.1em” background_color=”rgba(64,111,218,0.15)” custom_margin=”0px||||false|false” custom_padding=”30px|20px|30px|20px|true|true” global_colors_info=”{}”]<\/p>\n
Caption:<\/strong> Recreation of a burst, identified as CSS161010, in which a small black hole swallows a star. [\/et_pb_text][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.2″ _module_preset=”default” link_font=”|700|||on||||” global_colors_info=”{}”]<\/p>\n An international scientific team has managed to detect an exceptionally fast and bright cosmic burst in a small galaxy located 500 million light years away. This discovery, led by Claudia Guti\u00e9rrez, researcher from the <\/span>Institute of Space Studies of Catalonia<\/span><\/a> (IEEC \u2014 Institut d\u2019Estudis Espacials de Catalunya) at the <\/span>Institute of Space Sciences<\/span><\/a> (ICE-CSIC), is published today in a study in<\/span> The Astrophysical Journal<\/span><\/i>.<\/span><\/p>\n The burst, identified as CSS161010, reached its maximum brightness in just 4 days and dropped to half in just 2.5 days<\/b>, which meant that both its discovery and the subsequent observations of its evolution became a scientific milestone and a challenge for the research team.<\/span><\/p>\n The CSS161010 event was discovered by the Catalina Real-Time Transient Survey, with a previous detection reported by the All-Sky Automated Survey for SuperNovae. Its subsequent follow-up, which allowed its characterisation, was carried out with the <\/span>Gran Telescopio Canarias<\/span><\/a> (GTC) and the <\/span>Nordic Optical Telescope<\/span><\/a> (NOT), both installed at the Roque de Los Muchachos Observatory, of the Instituto de Astrof\u00edsica de Canarias (IAC), located in the municipality of Garaf\u00eda in La Palma.<\/span><\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.2″ _module_preset=”default” link_font=”|700|||on||||” locked=”off” global_colors_info=”{}”]<\/p>\n These types of rapidly evolving cosmic phenomena are very difficult to study due to their nature. However, modern techniques and more advanced instruments make it possible to study them thanks to the improved field of view and the ability to capture high-resolution images of the telescopes used.<\/span><\/p>\n To date, only a dozen cosmic explosions with these characteristics in terms of brightness and evolution have been detected, but their origin remains a complete mystery. However, the team of researchers led by Claudia Guti\u00e9rrez believes that, <\/span>for the first time, the unique spectral properties of CSS161010 provide important clues about its physical origin<\/b> and their analysis suggests that it is actually the image resulting from a small black hole swallowing a star.<\/span><\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.2″ _module_preset=”default” text_text_color=”#FFFFFF” text_font_size=”21px” text_line_height=”1.1em” background_color=”#406fda” text_orientation=”center” width=”70%” width_tablet=”70%” width_phone=”70%” width_last_edited=”on|desktop” module_alignment=”center” custom_padding=”40px|50px|40px|50px|true|true” custom_padding_tablet=”40px|50px|40px|50px|true|true” custom_padding_phone=”30px|20px|30px|20px|true|true” custom_padding_last_edited=”on|phone” text_font_size_tablet=”21px” text_font_size_phone=”19px” text_font_size_last_edited=”on|desktop” global_colors_info=”{}”]<\/p>\n <\/span>\u201cWe had never found a hydrogen line profile so blueshifted. This feature was both surprising and intriguing, prompting us to investigate possible connections with the galaxy where the event occurred,\u201d says Guti\u00e9rrez. <\/span><\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.2″ _module_preset=”default” link_font=”|700|||on||||” locked=”off” global_colors_info=”{}”]<\/p>\n This conclusion was reached as the team found broad hydrogen lines showing very high speed\u2014up to 10% of the light speed\u2014and an unprecedented evolution. Two months after the start of the outburst, the object’s brightness had decreased 900 times compared to its maximum. Surprisingly, the spectra captured by the Gran Telescopio Canarias at this time revealed that all the hydrogen line profiles were still blueshifted, which in astrophysics means they are moving towards us at extremely high speeds<\/strong>. This would indicate a strong gas outflow, something completely unforeseen for phenomena such as supernovae.<\/span><\/p>\n \u201cWe had never found a hydrogen line profile so blueshifted. This feature was both surprising and intriguing, prompting us to investigate possible connections with the galaxy where the event occurred,\u201d says Guti\u00e9rrez. <\/span><\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.2″ _module_preset=”default” header_2_font=”|700|||||||” header_2_font_size=”25px” header_2_font_size_tablet=”23px” header_2_font_size_phone=”23px” header_2_font_size_last_edited=”on|phone” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.2″ _module_preset=”default” link_font=”|700|||on||||” locked=”off” global_colors_info=”{}”]<\/p>\n The burst occurred in a tiny galaxy containing a mass of stars about 400 times less than our Milky Way\u2019s. Therefore, if the galaxy hosts a massive black hole, its mass must also be small, corresponding to an intermediate-mass black hole.<\/span><\/p>\n \u201cSo far, <\/span>this kind of black holes have been extremely hard to identify<\/b> and astronomers are only aware of a very small number of confirmed cases,\u201d explains professor Seppo Mattila, from the University of Turku in Finland, one of the lead authors of the paper. \u201cIdentifying and characterising intermediate-mass black holes is essential for understanding black hole formation pathways and evolution. In fact, they are the fundamental components of supermassive black holes found at the centre of galaxies, and they have been observed to exist even in the early Universe,\u201d adds Professor Mattila.<\/span><\/p>\n Professor Peter Lundqvist from Stockholm University, also part of this team, points out: \u201cThe disintegration of a star that came too close to the intermediate-mass black hole reveals the black hole, which would be quiescent otherwise. There are likely to be other such black holes in other dwarf galaxies, and we need to track down events similar to CSS161010 in order to determine the properties of these black holes more precisely.\u201d<\/span><\/p>\n <\/span><\/p>\n Press release prepared in collaboration with the Institute of Space Sciences.<\/span><\/em><\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.16″ _module_preset=”default” custom_margin=”30px||||false|false” locked=”off” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_divider color=”#406fda” _builder_version=”4.16″ _module_preset=”default” custom_margin=”||10px||false|false” global_colors_info=”{}”][\/et_pb_divider][et_pb_text admin_label=”M\u00e9s informaci\u00f3” _builder_version=”4.27.2″ _module_preset=”default” text_font=”Cairo|700|||||||” text_text_color=”#406fda” text_font_size=”20px” custom_margin=”||10px||false|false” global_colors_info=”{}”]<\/p>\n More information<\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.2″ _module_preset=”default” text_font_size=”16px” text_line_height=”1.1em” link_font=”|700|||on||||” custom_margin=”20px||||false|false” global_colors_info=”{}”]<\/p>\n <\/span>This research is presented in a paper entitled \u201c<\/span>CSS161010: A Luminous, Fast Blue Optical Transient with Broad Blueshifted Hydrogen Lines<\/span><\/a>\u201d, by <\/span>C. P. Guti\u00e9rrez <\/span>et al.<\/span><\/i>, to appear in the journal The Astrophysical Journal on 11 December 2024. DOI:10.3847\/1538-4357\/ad89a5<\/span><\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.16″ _module_preset=”default” custom_margin=”||||false|false” locked=”off” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_divider color=”#406fda” _builder_version=”4.16″ _module_preset=”default” custom_margin=”||10px||false|false” global_colors_info=”{}”][\/et_pb_divider][et_pb_text admin_label=”Enlla\u00e7os” _builder_version=”4.27.2″ _module_preset=”default” text_font=”Cairo|700|||||||” text_text_color=”#406fda” text_font_size=”20px” custom_margin=”||10px||false|false” global_colors_info=”{}”]<\/p>\n Links<\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.27.2″ _module_preset=”default” text_font_size=”16px” text_line_height=”1.1em” link_font=”|700|||on|||#1a1140|” link_text_color=”#1a1140″ link_line_height=”1.4em” custom_margin=”20px||||false|false” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.16″ _module_preset=”default” custom_margin=”||||false|false” locked=”off” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_divider color=”#406fda” _builder_version=”4.16″ _module_preset=”default” custom_margin=”||10px||false|false” global_colors_info=”{}”][\/et_pb_divider][et_pb_text admin_label=”Contactes” _builder_version=”4.27.2″ _module_preset=”default” text_font=”Cairo|700|||||||” text_text_color=”#406fda” text_font_size=”20px” custom_margin=”||10px||false|false” global_colors_info=”{}”]<\/p>\n Contacts<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”2_5,3_5″ admin_label=”Row” _builder_version=”4.16″ _module_preset=”default” custom_margin=”0px||||false|false” custom_padding=”0px||||false|false” global_colors_info=”{}”][et_pb_column type=”2_5″ _builder_version=”4.16″ _module_preset=”default” custom_padding=”|||20px|false|false” border_width_left=”1px” border_color_left=”#406fda” global_colors_info=”{}”][et_pb_text _builder_version=”4.16″ _module_preset=”default” text_font_size=”16px” text_line_height=”1.1em” link_font=”|700|||on|||#1a1140|” link_text_color=”#1a1140″ link_line_height=”1.4em” header_4_font=”|700|||||||” header_4_text_color=”#1a1140″ custom_margin=”||||false|false” locked=”off” global_colors_info=”{}”]<\/p>\n
Credits:<\/strong> Gabriel P\u00e9rez (IAC).<\/span><\/p>\nLooking for intermediate mass black holes<\/h2>\n
\n
IEEC Communication Office<\/h4>\n